ViewController.h
1 #import <UIKit/UIKit.h>
2
3 @interface ViewController : UIViewController{
4 NSTimer *timer;
5 UIScrollView *scrollViewText;
6 }
7
8 @property (nonatomic ,strong) NSArray *arrData;
9
10
11 @end
ViewController.m
1 //
2 // ViewController.m
3 // 跑马灯文字广告
4 //
5 // Created by Time.X on 16/2/15.
6 // Copyright © 2016年 Time.X. All rights reserved.
7 //
8
9 #import "ViewController.h"
10
11 #pragma mark - Class define variable
12 #define K_MAIN_VIEW_SCROLL_HEIGHT 80.0f
13 #define K_MAIN_VIEW_SCROLL_TEXT_TAG 300
14 #define K_MAIN_VIEW_TEME_INTERVAL 0.35 //计时器间隔时间(单位秒)
15 #define K_MAIN_VIEW_SCROLLER_SPACE 20 //每次移动的距离
16 #define K_MAIN_VIEW_SCROLLER_LABLE_WIDTH 280 //字体宽度
17 #define K_MAIN_VIEW_SCROLLER_LABLE_MARGIN 20 //前后间隔距离
18
19 @interface ViewController ()
20
21 @end
22
23 @implementation ViewController
24
25 #pragma mark - Class property
26 @synthesize arrData;
27
28 - (void)viewDidLoad {
29 [super viewDidLoad];
30
31 [self initView];
32 }
33
34 - (void)didReceiveMemoryWarning {
35 [super didReceiveMemoryWarning];
36 // Dispose of any resources that can be recreated.
37 }
38
39
40 #pragma mark - Custom method
41 //初始化数据
42 -(void) initView{
43
44 if (!self.arrData) {
45 self.arrData = @[
46 @{
47 @"newsId" :@"201507070942261935",
48 @"newsImg" :@"http://bg.fx678.com/HTMgr/upload/UpFiles/20150707/sy_2015070709395519.jpg",
49 @"newsTitle" : @"三大理由欧元任性抗跌，欧元区峰会将为希腊定调"
50 },
51 @{
52 @"newsId" :@201507070929021220,
53 @"newsImg" :@"http://bg.fx678.com/HTMgr/upload/UpFiles/20150707/sy_2015070709273545.jpg",
54 @"newsTitle" :@"欧盟峰会或现希腊转机，黄金打响1162保卫战"
55 },
56 @{
57 @"newsId" :@201507070656471857,
58 @"newsImg" :@"http://bg.fx678.com/HTMgr/upload/UpFiles/20150707/2015070706533134.jpg",
59 @"newsTitle" :@"希腊困局欧元不怕，油价服软暴跌8%"
60 }
61 ];
62 }
63
64 //文字滚动
65 [self initScrollText];
66
67 //开启滚动
68 [self startScroll];
69 }
70
71
72 //文字滚动初始化
73 -(void) initScrollText{
74
75 //获取滚动条
76 scrollViewText = (UIScrollView *)[self.view viewWithTag:K_MAIN_VIEW_SCROLL_TEXT_TAG];
77 if(!scrollViewText){
78 scrollViewText = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, K_MAIN_VIEW_SCROLL_HEIGHT)];
79 scrollViewText.showsHorizontalScrollIndicator = NO; //隐藏水平滚动条
80 scrollViewText.showsVerticalScrollIndicator = NO; //隐藏垂直滚动条
81 scrollViewText.tag = K_MAIN_VIEW_SCROLL_TEXT_TAG;
82 [scrollViewText setBackgroundColor:[UIColor grayColor]];
83
84 //清除子控件
85 for (UIView *view in [scrollViewText subviews]) {
86 [view removeFromSuperview];
87 }
88
89 //添加到当前视图
90 [self.view addSubview:scrollViewText];
91 }
92
93
94 if (self.arrData) {
95
96 CGFloat offsetX = 0 ,i = 0, h = 30;
97
98 //设置滚动文字
99 UILabel *labText = nil;
100 for (NSDictionary *dicTemp in self.arrData) {
101 labText = [[UILabel alloc] initWithFrame:CGRectMake(
102 i * (K_MAIN_VIEW_SCROLLER_LABLE_WIDTH + K_MAIN_VIEW_SCROLLER_LABLE_MARGIN),
103 (K_MAIN_VIEW_SCROLL_HEIGHT - h) / 2,
104 K_MAIN_VIEW_SCROLLER_LABLE_WIDTH,
105 h)];
106 [labText setFont:[UIFont systemFontOfSize:18]];
107 [labText setTextColor:[UIColor whiteColor]];
108 labText.text = dicTemp[@"newsTitle"];
109 offsetX += labText.frame.origin.x;
110
111 //添加到滚动视图
112 [scrollViewText addSubview:labText];
113
114 i++;
115 }
116
117 //设置滚动区域大小
118 [scrollViewText setContentSize:CGSizeMake(offsetX, 0)];
119 }
120 }
121
122
123 //开始滚动
124 -(void) startScroll{
125
126 if (!timer)
127 timer = [NSTimer scheduledTimerWithTimeInterval:K_MAIN_VIEW_TEME_INTERVAL target:self selector:@selector(setScrollText) userInfo:nil repeats:YES];
128
129 [timer fire];
130 }
131
132
133 //滚动处理
134 -(void) setScrollText{
135
136 CGFloat startX = scrollViewText.contentSize.width - K_MAIN_VIEW_SCROLLER_LABLE_WIDTH - K_MAIN_VIEW_SCROLLER_LABLE_MARGIN;
137
138 [UIView animateWithDuration:K_MAIN_VIEW_TEME_INTERVAL * 2 animations:^{
139 CGRect rect;
140 CGFloat offsetX = 0.0;
141
142 for (UILabel *lab in scrollViewText.subviews) {
143
144 rect = lab.frame;
145 offsetX = rect.origin.x - K_MAIN_VIEW_SCROLLER_SPACE;
146 if (offsetX < -K_MAIN_VIEW_SCROLLER_LABLE_WIDTH)
147 offsetX = startX;
148
149 lab.frame = CGRectMake(offsetX, rect.origin.y, rect.size.width, rect.size.height);
150 }
151
152 NSLog(@"offsetX:%f",offsetX);
153
154 }];
155
156 }
157
158 @end
