uni-app初探之天气预报小例子

概述

在实际工作中，App既需要支持Android手机，又要支持IOS手机，还要支持微信小程序，公众号等，面对这样的需求，是否劳心费力，苦不堪言，还要考虑各平台的兼容性。现在uni-app以“开发一次，多端覆盖”的理念，海纳百川，求同存异，受到大多数开发者的青睐。uni-app是采用vue.js作为开发前端应用的框架，开发者编写一套代码，可发布到iOS、Android、Web（响应式）、以及各种小程序（微信/支付宝/百度/头条/QQ/钉钉/淘宝）、快应用等多个平台。本文以一个天气预报的小例子，简述uni-app的开发步骤。

为什么选择uni-app ？

  1. uni-app实现了一套代码，同时运行到多个平台。
  2. uni-app在开发者数量、案例、跨端抹平度、扩展灵活性、性能体验、周边生态、学习成本、开发成本等8大关键指标上拥有更强的优势。
  3. DCloud为uni-app开发提供了开发利器HBuilderX，以其轻巧极速，强大的语法提示，清爽护眼，和专为vue量身打造的优势，吸引了大多数的开发者。

uni-app目录结构

一个uni-app工程，默认包含如下目录及文件，如下图所示：

 

uni-app应用生命周期

uni-app 支持如下应用生命周期函数：

 

 注意：应用生命周期仅可在App.vue中监听，在其它页面监听无效。

uni-app页面生命周期

uni-app 支持如下页面生命周期函数：

 

 关于其他uni-app介绍，可以参考uni-app官网

示例效果图

 本次开发是一个天气预报的小例子，在Chrome浏览器里面如下图所示：

 在Android手机上如下所示：

源码分析

 在uni-app开发小例子时，为了代码的复用，自定义三个组件，包括，风车组件，圆形进度球组件，天气组件。源码分别如下：

（一）圆形进度球组件

组件包含三部分，分别是页面(template)，脚本(JavaScript)，样式(CSS)，源码如下：

页面(template)代码如下：

 1 <template>
 2     <view class="content">
 3         <view class="progress">
 4             <view class="progress_outer">
 5                 <view class="progress_inner"></view>
 6                 <view class="progress_masker" :style="maskStyle"></view>
 7             </view>
 8             <view class="progress_value">{{cvalue}}%</view>
 9         </view>
10     </view>
11 </template>
View Code

脚本(JavaScript)代码如下：

 1 <script>
 2     export default {
 3         props: {
 4             cvalue: {
 5                 // 进度条百分比
 6                 type: Number,
 7                 default: 10,
 8             },
 9         },
10 
11         data() {
12             return {
13 
14             };
15         },
16         computed: {
17             maskStyle(){
18                 var top=100-this.cvalue;
19                 return {marginTop :  top + '%'};
20             },
21             
22         }
23 
24     }
25 </script>
View Code

样式(CSS)代码如下：

 1 <style>
 2     .content{
 3         width: 200rpx;
 4         height: 200rpx;
 5         display: block;
 6         box-sizing: border-box;
 7     }
 8     .progress {
 9         position: relative;
10         width: 200rpx;
11         height: 200rpx;
12         padding: 0;
13         box-sizing: border-box;
14     }
15     .progress_outer
16     {
17          height:100%;
18          width:100%;
19          background-color:gray;
20          border-radius:calc(100%/2);
21          border:5px solid rgba(0,0,0, 0.1);
22          padding:0;
23          box-shadow: 0px 2px 4px #555555;
24          -webkit-box-shadow: 0px 2px 4px #555555;
25          -moz-box-shadow: 0px 2px 4px #555555;
26          position: absolute;
27          box-sizing: border-box;
28          overflow: hidden;
29          
30      }
31       .progress_inner
32       {
33           height:100%;
34           width:100%;
35           border:1px solid yellow;
36           border-radius:calc(100%/2);
37           position:absolute;
38           background-color:white;
39           text-align:center;
40           box-sizing: border-box;
41           
42       }
43      .progress_masker
44      {
45          height:100%;
46          width:100%;
47          background: -webkit-gradient(linear,center top,center bottom,from(#0ff), to(#0f0));
48          background: -moz-linear-gradient( top,#fff,#0f0);
49          background: -o-linear-gradient( top,#fff,#0f0);
50          position: absolute;
51          box-sizing: border-box;
52      }
53      .progress_value
54      {
55          width:100%;
56          color:black;
57          font-weight:bolder;
58          background-color:transparent;
59          text-align:center;
60          position: absolute;
61          margin-top: 90rpx;
62      }
63 </style>
View Code

（二）风车组件

风车组件包含两部分，分别是页面(template)，样式(CSS)，源码如下：

页面(template)代码如下：

 1 <template>
 2     <view>
 3         <view class="wind_mill">
 4             <view class="cicle"></view>
 5             <view class="vane">
 6                 <view class="vane1"></view>
 7                 <view class="vane2"></view>
 8                 <view class="vane3"></view>
 9             </view>
10             <view class="blade">
11                 
12             </view>
13         </view>
14     </view>
15 </template>
View Code

 样式(CSS)代码如下：

 1 <style>
 2     .wind_mill{
 3         width: 200rpx;
 4         height: 220rpx;
 5         /* background-color:  rgba(25, 83, 157, 0.5); */
 6         position: relative;
 7     }
 8     @keyframes vanflash{
 9         from{transform: rotate(0deg); transform-origin: center;}
10         to{transform: rotate(360deg);transform-origin: center;}
11     }
12     .vane{
13         width: 200rpx;
14         height: 200rpx;
15         position: relative;
16         animation-name: vanflash;
17         animation-duration: 5s;
18         animation-iteration-count: infinite;
19         -webkit-animation-name: vanflash;
20         -webkit-animation-duration: 5s;
21         -webkit-animation-iteration-count: infinite;
22     }
23     .vane1{
24         display: block;
25         width: 80rpx;
26         height: 4rpx;
27         background-color: #FFFFFF;
28         border-radius: 5rpx;
29         position: absolute;
30         left: 100rpx;
31         top:100rpx;
32         transform: rotate(0deg);
33         transform-origin:left;
34         -webkit-transform:rotate(0deg);
35         
36     }
37     .vane2{
38         width: 80rpx;
39         height: 4rpx;
40         background-color: #FFFFFF;
41         position: absolute;
42         left: 100rpx;
43         top:100rpx;
44         border-radius: 5rpx;
45         transform: rotate(120deg);
46         transform-origin:left;
47         -webkit-transform:rotate(120deg);
48     }
49     .vane3{
50         width: 80rpx;
51         height: 4rpx;
52         background-color: #FFFFFF;
53         position: absolute;
54         left: 100rpx;
55         top:100rpx;
56         border-radius: 5rpx;
57         transform: rotate(240deg);
58         transform-origin:left;
59         -webkit-transform:rotate(240deg);
60     }
61     .cicle{
62         position: absolute;
63         left: 90rpx;
64         top:90rpx;
65         background-color: #FFFFFF;
66         width: 20rpx;
67         height: 20rpx;
68         border-radius: 16rpx;
69     }
70     .blade{
71         width: 120rpx;
72         height: 10rpx;
73         background-color: #FFFFFF;
74         position: absolute;
75         left: 100rpx;
76         top:100rpx;
77         border-radius: 5rpx;
78         transform: rotate(90deg);
79         transform-origin:left;
80         -webkit-transform:rotate(90deg);
81     }
82 </style>
View Code

（三）天气组件

天气组件，引用了前面两个组件，并有自定义数据内容，如下所示：

页面(template)代码如下：

 1 <template>
 2     <scroll-view scroll-y="true" class="main">
 3         <view class="current">
 4             <view class="district">{{district}}</view>
 5             <view class="temp">{{temp}}°C</view>
 6             <view class="temp_range">{{temprange}}</view>
 7             <view class="temp_desc">{{tempdesc}}</view>
 8             <br>
 9             <view class="temp_src">
10                 <view class="temp_src_left">中国气象</view>
11                 <view class="temp_src_right">上次更新时间：{{updatetime}}</view>
12             </view>
13         </view>
14         <scroll-view scroll-x="true">
15             <view class="hour" enable-flex="true">
16                 <view class="each_hour" v-for="item in timelist">
17                     <view class="each_hour_time">{{item.time}}</view>
18                     <image :src="item.img" mode="scaleToFill" class="each_hour_img" ></image>
19                     <view class="each_hour_temp">{{item.temp}}</view>
20                 </view>
21             </view>
22         </scroll-view>
23 
24         <view class="sevenday">
25             <view class="each_day" v-for="item in daylist">
26                 <view class="each_day_text">
27                     {{item.day}} {{item.week}}
28                 </view>
29                 <image class="each_day_img" :src="item.img" mode=""></image>
30                 <view class="each_day_temp">{{item.temp}}</view>
31             </view>
32 
33         </view>
34         <view class="air">
35             <view class="air_title">
36                 <view class="" style="flex: 1;">空气质量</view>
37                 <view class="" style="text-align: right;flex: 1;">更多></view>
38             </view>
39             <view class="air_body">
40                 <view class="air_left">
41                     <airprogress class="airprogress" :cvalue="airvalue"></airprogress>
42                 </view>
43                 <view class="air_right">
44                     <view class="air_content" v-for="item in airlist">
45                         <view class="air_content_name">{{item.name}}</view>
46                         <view class="air_content_value">{{item.value}}</view>
47                     </view>
48                 </view>
49             </view>
50         </view>
51         <view class="wind">
52             <view class="wind_title">
53                 <view class="" style="flex: 1;">风向风力</view>
54                 <view class="" style="text-align: right;flex: 1;">更多></view>
55             </view>
56             <view class="wind_body">
57                 <view class="wind_left">
58                     <windmill class="wind01"></windmill>
59                     <windmill class="wind02"></windmill>
60                 </view>
61                 <view class="wind_right">
62                     <view class="wind_right_direction">
63                         <view style="flex: 1;text-align: left;">风向</view>
64                         <view style="flex: 1;text-align: left;">{{winddirection}}</view>
65                     </view>
66                     <view class="wind_right_power">
67                         <view style="flex: 1;text-align: left;">风力</view>
68                         <view style="flex: 1;text-align: left;">{{windpower}}</view>
69                     </view>
70                 </view>
71             </view>
72         </view>
73         <view class="provider">provide by Alan.hsiang</view>
74     </scroll-view>
75 </template>
View Code

脚本(JavaScript)代码如下：

 1 <script>
 2     import windmill from "../windmill/windmill.vue"
 3     import airprogress from "../airprogress/airprogress.vue"
 4     export default {
 5         components: {
 6             windmill,
 7             airprogress
 8         },
 9         props:{
10             district:{
11                 type:String,
12                 required:true,
13             },
14             temp:{
15                 type:Number,
16                 default:0
17             },
18             temprange:{
19                 type:String,
20                 
21             },
22             tempdesc:{
23                 type:String,
24                 
25             },
26             updatetime:{
27                 type:String,
28                 
29             },
30             timelist:{
31                 type:Array,
32                 
33             },
34             daylist:{
35                 type:Array,
36                 
37             },
38             airvalue:{
39                 type:Number,
40                 default:10,
41                 
42             },
43             airlist:{
44                 type:Array,
45                 
46             },
47             winddirection:{
48                 type:String,
49                 
50             },
51             windpower:{
52                 type:String,
53                 
54             }
55         },
56         data() {
57             return {
58                 
59 
60             };
61         },
62         }
63 </script>
View Code

样式(CSS)代码如下：

  1 <style>
  2     view {
  3         /* border: #007AFF 1rpx solid; */
  4         font-family: Arial, Helvetica, sans-serif;
  5         font-size: 28rpx;
  6         padding: 2rpx;
  7     }
  8 
  9     .main {
 10         width: 100%;
 11         height: 100%;
 12         padding: 4rpx;
 13         background-color: rgba(25, 83, 157, 0.5);
 14         color: #FFFFFF;
 15     }
 16 
 17     .current {
 18         display: flex;
 19         flex-direction: column;
 20         vertical-align: middle;
 21         justify-content: center;
 22         height: 400rpx;
 23         border-bottom: #F1F1F1 2rpx solid;
 24     }
 25 
 26     .current view {
 27         margin-bottom: 4rpx;
 28     }
 29 
 30     .district {
 31         height: 60rpx;
 32         font-size: 45rpx;
 33         text-align: center;
 34 
 35     }
 36 
 37     .temp {
 38         height: 90rpx;
 39         font-size: 70rpx;
 40         text-align: center;
 41         line-height: 1.5;
 42     }
 43 
 44     .temp_range {
 45         height: 60rpx;
 46         font-size: 40rpx;
 47         text-align: center;
 48         line-height: 1.5;
 49     }
 50 
 51     .temp_desc {
 52         height: 50rpx;
 53         font-size: 30rpx;
 54         text-align: center;
 55         line-height: 1.5;
 56     }
 57 
 58     .temp_src {
 59         display: flex;
 60         flex-direction: row;
 61         text-align: justify;
 62         vertical-align: bottom;
 63     }
 64 
 65     .temp_src_left {}
 66 
 67     .temp_src_right {
 68         flex: 1;
 69         text-align: right;
 70     }
 71 
 72     .top {
 73         display: flex;
 74         flex-direction: column;
 75     }
 76 
 77     .hour {
 78         display: flex;
 79         flex-direction: row;
 80         text-align: center;
 81         font-size: small;
 82         margin-top: 4rpx;
 83         margin-bottom: 4rpx;
 84         border-bottom: #F1F1F1 2rpx solid;
 85     }
 86     .each_hour{
 87         margin-left: 6rpx;
 88     }
 89     .each_hour_img{
 90         width: 50rpx;
 91         height: 50rpx;
 92     }
 93     .sevenday {
 94         display: flex;
 95         flex-direction: column;
 96     }
 97 
 98     .each_day {
 99         display: flex;
100         flex-direction: row;
101         text-align: center;
102         margin-bottom: 2rpx;
103         border-bottom: #F1F1F1 2rpx solid;
104 
105     }
106 
107 
108     .each_day_text {
109         flex: 1;
110         text-align: left;
111         line-height: 2;
112     }
113 
114 
115     .each_day_img {
116         width: 70rpx;
117         height: 70rpx;
118     }
119 
120     .each_day_temp {
121         flex: 1;
122         text-align: right;
123         line-height: 2;
124     }
125 
126     .air {
127         display: flex;
128         flex-direction: column;
129         margin: 6rpx;
130     }
131 
132     .air_title {
133         display: flex;
134         flex-direction: row;
135         font-size: small;
136     }
137 
138     .air_body {
139         display: flex;
140         flex-direction: row;
141     }
142 
143     .air_left {
144         flex: 1;
145         display: inline-block;
146         text-align: center;
147         margin-top: 6rpx;
148     }
149     .airprogress{
150         position: absolute;
151         left: 40rpx;
152     }
153     .air_right {
154         flex: 1;
155         display: flex;
156         flex-direction: column;
157     }
158 
159     .air_content {
160         display: flex;
161         flex-direction: row;
162     }
163 
164     .air_content_name {
165         flex: 1;
166         font-size: 20rpx;
167     }
168 
169     .air_content_value {
170         flex: 1;
171         font-size: 20rpx;
172     }
173 
174     
175     .wind{
176         display: flex;
177         flex-direction: column;
178         height: 260rpx;
179         margin: 6rpx;
180     }
181     .wind_title{
182         display: flex;
183         flex-direction: row;
184     }
185     .wind_body{
186         display: flex;
187         flex-direction: row;
188     }
189     .wind_left{
190         flex: 1;
191         position: relative;
192         height: 150rpx;
193     }
194     .wind_right{
195         flex: 1;
196         display: flex;
197         flex-direction: column;
198     }
199     .wind_right_direction{
200         flex: 0.5;
201         display: flex;
202         flex-direction: row;
203     }
204     .wind_right_power{
205         flex: 1;
206         display: flex;
207         flex-direction: row;
208     }
209     .wind_left_img{
210         width: 140rpx;
211         height: 140rpx;
212     }
213     .wind01{
214         position: absolute;
215         top: 10rpx;
216         left: 0rpx;
217     }
218     .wind02{
219         position: absolute;
220         top: -20rpx;
221         left: 90rpx;
222     }
223     .provider{
224         text-align: center;
225     }
226 </style>
View Code

 

（四）页面调用组件

当组件定义完成，就可以在页面引用组件，如下所示：

本例采用swiper来实现左右滑动功能，页面(template)源码如下：

 1 <template>
 2     <view class="content">
 3         <swiper :indicator-dots="showIndicatorDots" indicator-color="#FFFFFF" indicator-active-color="#FF0000" :autoplay="isAutoPlay">
 4             <swiper-item v-for="(item,index) in weather_content">
 5                 <weather :id="index" 
 6                 :district="item.district" 
 7                 :temp="item.temp" 
 8                 :tempdesc="item.tempdesc" 
 9                 :temprange="item.temprange"
10                 :updatetime="item.updatetime"
11                 :timelist="item.time_list"
12                 :daylist="item.day_list"
13                 :airvalue="item.air_value"
14                 :airlist="item.air_list"
15                 :winddirection="item.winddirection"
16                 :windpower="item.windpower"
17                 class="weather">
18                     
19                 </weather>
20             </swiper-item>
21         </swiper>
22     </view>
23 </template>
View Code

本例通过脚本造了一些数据，没有进行接口调用，脚本(JavaScript)代码如下：

  1 <script>
  2     import weather from "@/components/weather/weather.vue"
  3     export default {
  4         components: {
  5             weather
  6         },
  7         data() {
  8             return {
  9                 title: 'Hello',
 10                 showIndicatorDots:true,
 11                 isAutoPlay:false,
 12                 weather_content:[{
 13                     district:"龙岗区",
 14                     temp:23,
 15                     temprange:"-2°C / 10°C",
 16                     tempdesc:"晴 空气良",
 17                     updatetime:"22:10",
 18                     time_list: [{
 19                             time: "00:00",
 20                             img: "../../static/day/00.png",
 21                             temp: "0°C"
 22                         },
 23                         {
 24                             time: "01:00",
 25                             img: "../../static/day/01.png",
 26                             temp: "1°C"
 27                         }, {
 28                             time: "02:00",
 29                             img: "../../static/day/02.png",
 30                             temp: "2°C"
 31                         },
 32                         {
 33                             time: "03:00",
 34                             img: "../../static/day/03.png",
 35                             temp: "3°C"
 36                         }, {
 37                             time: "04:00",
 38                             img: "../../static/day/04.png",
 39                             temp: "4°C"
 40                         },
 41                         {
 42                             time: "05:00",
 43                             img: "../../static/day/05.png",
 44                             temp: "5°C"
 45                         }, {
 46                             time: "06:00",
 47                             img: "../../static/day/06.png",
 48                             temp: "6°C"
 49                         },
 50                         {
 51                             time: "07:00",
 52                             img: "../../static/day/07.png",
 53                             temp: "7°C"
 54                         }, {
 55                             time: "08:00",
 56                             img: "../../static/day/08.png",
 57                             temp: "8°C"
 58                         },
 59                         {
 60                             time: "09:00",
 61                             img: "../../static/day/09.png",
 62                             temp: "9°C"
 63                         }, {
 64                             time: "10:00",
 65                             img: "../../static/day/10.png",
 66                             temp: "10°C"
 67                         },
 68                         {
 69                             time: "11:00",
 70                             img: "../../static/day/11.png",
 71                             temp: "11°C"
 72                         }, {
 73                             time: "12:00",
 74                             img: "../../static/day/12.png",
 75                             temp: "12°C"
 76                         },
 77                         {
 78                             time: "13:00",
 79                             img: "../../static/day/13.png",
 80                             temp: "13°C"
 81                         }, {
 82                             time: "14:00",
 83                             img: "../../static/day/14.png",
 84                             temp: "14°C"
 85                         },
 86                         {
 87                             time: "15:00",
 88                             img: "../../static/day/15.png",
 89                             temp: "15°C"
 90                         }, {
 91                             time: "16:00",
 92                             img: "../../static/day/16.png",
 93                             temp: "16°C"
 94                         },
 95                         {
 96                             time: "17:00",
 97                             img: "../../static/day/17.png",
 98                             temp: "17°C"
 99                         }, {
100                             time: "18:00",
101                             img: "../../static/day/18.png",
102                             temp: "18°C"
103                         },
104                         {
105                             time: "19:00",
106                             img: "../../static/day/19.png",
107                             temp: "19°C"
108                         }, {
109                             time: "20:00",
110                             img: "../../static/day/20.png",
111                             temp: "20°C"
112                         },
113                         {
114                             time: "21:00",
115                             img: "../../static/day/21.png",
116                             temp: "21°C"
117                         }, {
118                             time: "22:00",
119                             img: "../../static/day/22.png",
120                             temp: "22°C"
121                         },
122                         {
123                             time: "23:00",
124                             img: "../../static/day/23.png",
125                             temp: "23°C"
126                         }
127                     ],
128                     day_list: [{
129                             day: "10月31日",
130                             week: "昨天",
131                             img: "../../static/night/00.png",
132                             temp: "26°C/21°C"
133                         },
134                         {
135                             day: "11月01日",
136                             week: "今天",
137                             img: "../../static/night/01.png",
138                             temp: "22°C/11°C"
139                         },
140                         {
141                             day: "11月02日",
142                             week: "明天",
143                             img: "../../static/night/03.png",
144                             temp: "12°C/11°C"
145                         },
146                         {
147                             day: "11月03日",
148                             week: "星期二",
149                             img: "../../static/night/04.png",
150                             temp: "18°C/01°C"
151                         },
152                         {
153                             day: "11月04日",
154                             week: "星期三",
155                             img: "../../static/night/06.png",
156                             temp: "22°C/02°C"
157                         },
158                         {
159                             day: "11月05日",
160                             week: "星期四",
161                             img: "../../static/night/07.png",
162                             temp: "12°C/02°C"
163                         },
164                         {
165                             day: "11月07日",
166                             week: "星期五",
167                             img: "../../static/night/09.png",
168                             temp: "06°C/02°C"
169                         }
170                     ],
171                     air_value:30,
172                     air_list: [{
173                             name: "PM10",
174                             value: 23
175                         },
176                         {
177                             name: "PM2.5",
178                             value: 25
179                         },
180                         {
181                             name: "NO2",
182                             value: 28
183                         },
184                         {
185                             name: "SO2",
186                             value: 5
187                         },
188                         {
189                             name: "O3",
190                             value: 35
191                         },
192                         {
193                             name: "CO",
194                             value: 0.91
195                         }
196                     ],
197                     winddirection:"北风",
198                     windpower:"3~4级"
199                 },{
200                     district:"东城区",
201                     temp:13,
202                     temprange:"12°C / 20°C",
203                     tempdesc:"阴 空气很好",
204                     updatetime:"22:00",
205                     time_list: [{
206                             time: "00:00",
207                             img: "../../static/night/00.png",
208                             temp: "0°C"
209                         },
210                         {
211                             time: "01:00",
212                             img: "../../static/night/01.png",
213                             temp: "1°C"
214                         }, {
215                             time: "02:00",
216                             img: "../../static/night/02.png",
217                             temp: "2°C"
218                         },
219                         {
220                             time: "03:00",
221                             img: "../../static/night/03.png",
222                             temp: "3°C"
223                         }, {
224                             time: "04:00",
225                             img: "../../static/night/04.png",
226                             temp: "4°C"
227                         },
228                         {
229                             time: "05:00",
230                             img: "../../static/night/05.png",
231                             temp: "5°C"
232                         }, {
233                             time: "06:00",
234                             img: "../../static/night/06.png",
235                             temp: "6°C"
236                         },
237                         {
238                             time: "07:00",
239                             img: "../../static/night/07.png",
240                             temp: "7°C"
241                         }, {
242                             time: "08:00",
243                             img: "../../static/night/08.png",
244                             temp: "8°C"
245                         },
246                         {
247                             time: "09:00",
248                             img: "../../static/night/09.png",
249                             temp: "9°C"
250                         }, {
251                             time: "10:00",
252                             img: "../../static/night/10.png",
253                             temp: "10°C"
254                         },
255                         {
256                             time: "11:00",
257                             img: "../../static/night/11.png",
258                             temp: "11°C"
259                         }, {
260                             time: "12:00",
261                             img: "../../static/night/12.png",
262                             temp: "12°C"
263                         },
264                         {
265                             time: "13:00",
266                             img: "../../static/night/13.png",
267                             temp: "13°C"
268                         }, {
269                             time: "14:00",
270                             img: "../../static/night/14.png",
271                             temp: "14°C"
272                         },
273                         {
274                             time: "15:00",
275                             img: "../../static/night/15.png",
276                             temp: "15°C"
277                         }, {
278                             time: "16:00",
279                             img: "../../static/night/16.png",
280                             temp: "16°C"
281                         },
282                         {
283                             time: "17:00",
284                             img: "../../static/night/17.png",
285                             temp: "17°C"
286                         }, {
287                             time: "18:00",
288                             img: "../../static/night/18.png",
289                             temp: "18°C"
290                         },
291                         {
292                             time: "19:00",
293                             img: "../../static/night/19.png",
294                             temp: "19°C"
295                         }, {
296                             time: "20:00",
297                             img: "../../static/night/20.png",
298                             temp: "20°C"
299                         },
300                         {
301                             time: "21:00",
302                             img: "../../static/night/21.png",
303                             temp: "21°C"
304                         }, {
305                             time: "22:00",
306                             img: "../../static/night/22.png",
307                             temp: "22°C"
308                         },
309                         {
310                             time: "23:00",
311                             img: "../../static/night/23.png",
312                             temp: "23°C"
313                         }
314                     ],
315                     day_list: [{
316                             day: "10月31日",
317                             week: "昨天",
318                             img: "../../static/day/00.png",
319                             temp: "6°C/21°C"
320                         },
321                         {
322                             day: "11月01日",
323                             week: "今天",
324                             img: "../../static/day/01.png",
325                             temp: "12°C/11°C"
326                         },
327                         {
328                             day: "11月02日",
329                             week: "明天",
330                             img: "../../static/day/03.png",
331                             temp: "22°C/09°C"
332                         },
333                         {
334                             day: "11月03日",
335                             week: "星期二",
336                             img: "../../static/day/04.png",
337                             temp: "28°C/11°C"
338                         },
339                         {
340                             day: "11月04日",
341                             week: "星期三",
342                             img: "../../static/day/06.png",
343                             temp: "12°C/02°C"
344                         },
345                         {
346                             day: "11月05日",
347                             week: "星期四",
348                             img: "../../static/day/07.png",
349                             temp: "22°C/12°C"
350                         },
351                         {
352                             day: "11月07日",
353                             week: "星期五",
354                             img: "../../static/night/09.png",
355                             temp: "16°C/12°C"
356                         }
357                     ],
358                     air_value:67,
359                     air_list: [{
360                             name: "PM10",
361                             value: 63
362                         },
363                         {
364                             name: "PM2.5",
365                             value: 39
366                         },
367                         {
368                             name: "NO2",
369                             value: 23
370                         },
371                         {
372                             name: "SO2",
373                             value: 5
374                         },
375                         {
376                             name: "O3",
377                             value: 65
378                         },
379                         {
380                             name: "CO",
381                             value: 0.71
382                         }
383                     ],
384                     winddirection:"东南风",
385                     windpower:"1~4级"
386                 }]
387             }
388         },
389         onLoad() {
390             console.log("测试加载页面")
391         },
392         onShow(){
393             console.log("页面onshow....")
394         },
395         methods: {
396 
397         }
398     }
399 </script>
View Code

样式(CSS)代码如下：

 1 <style>
 2     .content {
 3         width: 100%;
 4         height: 100%;
 5         color: #007AFF;
 6     }
 7     swiper{
 8         width: 100%;
 9         height: 100%;
10     }
11     .swiper-item{
12         border: #007AFF 1rpx solid;
13     }
14     .weather{
15         height: 100%;
16     }
17 </style>
View Code

（五）注意事项

例子虽小，开发时也会踩坑，具体事项如下：

1. 开发过程中，在运行到Chrome浏览器，一切正常，但是当运行到Android真机时，页面除了导航条显示，其他一片空白，后来发现，需要在App.vue中定义页面的高度，才可以正常显示。App.vue源码如下所示：

 1 <script>
 2     export default {
 3         onLaunch: function() {
 4             console.log('App Launch')
 5         },
 6         onShow: function() {
 7             console.log('App Show')
 8         },
 9         onHide: function() {
10             console.log('App Hide')
11         }
12     }
13 </script>
14 
15 <style>
16     /*每个页面公共css */
17     uni-page-body,#app {width:100%;height: 100%;}
18     /* #ifdef APP-PLUS */
19     
20     /* 以下样式用于 hello uni-app 演示所需 */
21     page {
22         /* background-color: #F4F5F6; */
23         height: 100%;
24         /* font-size: 28rpx; */
25         /* line-height: 1.8; */
26     }
27     /* #endif*/
28 </style>
View Code

2. 在开发过程中，最初圆形进度条是采用svg进行开发，在Chrome浏览器显示正常，但是在手机App上显示不出来，并造成页面显示一大片空白，后来不得已采用css实现。

备注

次北固山下
【作者】王湾  【朝代】唐 
客路青山外，行舟绿水前。
潮平两岸阔，风正一帆悬。
海日生残夜，江春入旧年。
乡书何处达？归雁洛阳边。

posted @ 2020-11-13 23:33  老码识途呀  阅读(2962)  评论(0)  编辑  收藏  举报