1 // ViewController.m
2 // 04-掌握-NSURLConnection发送GET请求
3 //
4 // Created by xiaomage on 16/2/22.
5 // Copyright © 2016年 小码哥. All rights reserved.
6 //
7
8 #import "ViewController.h"
9
10 @interface ViewController ()<NSURLConnectionDataDelegate>
11 /** 注释 */
12 @property (nonatomic, strong) NSMutableData *resultData;
13 @end
14
15 @implementation ViewController
16
17 #pragma mark ----------------------
18 #pragma mark lazy loading
19 -(NSMutableData *)resultData
20 {
21 if (_resultData == nil) {
22 _resultData = [NSMutableData data];
23 }
24 return _resultData;
25 }
26 #pragma mark ----------------------
27 #pragma mark Events
28 -(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
29 {
30 [self delegate];
31 }
32
33 /*
34 请求:请求头(NSURLRequest默认包含)+请求体(GET没有)
35 响应:响应头(真实类型--->NSHTTPURLResponse)+响应体(要解析的数据)
36 */
37 #pragma mark ----------------------
38 #pragma mark Methods
39 -(void)sync
40 {
41 /*
42 GET:http://120.25.226.186:32812/login?username=123&pwd=456&type=JSON
43 协议+主机地址+接口名称+?+参数1&参数2&参数3
44 post:http://120.25.226.186:32812/login
45 协议+主机地址+接口名称
46 */
47 //GET,没有请求体
48 //1.确定请求路径
49 NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login?username=520it&pwd=520it&type=JSON"];
50
51 //2.创建请求对象
52 //请求头不需要设置(默认的请求头)
53 //请求方法--->默认为GET
54 NSURLRequest *request = [[NSURLRequest alloc]initWithURL:url];
55
56 //3.发送请求
57 //真实类型:NSHTTPURLResponse
58 NSHTTPURLResponse *response = nil;
59 /*
60 第一个参数:请求对象
61 第二个参数:响应头信息
62 第三个参数:错误信息
63 返回值:响应体
64 */
65 //该方法是阻塞的,即如果该方法没有执行完则后面的代码将得不到执行
66 NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
67
68 //4.解析 data--->字符串
69 //NSUTF8StringEncoding
70 NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
71
72 NSLog(@"%zd",response.statusCode);
73 }
74
75 -(void)async
76 {
77 //1.确定请求路径
78 NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login?username=520it&pwd=520it&type=JSON"];
79
80 //2.创建请求对象
81 //请求头不需要设置(默认的请求头)
82 NSURLRequest *request = [[NSURLRequest alloc]initWithURL:url];
83
84 //3.发送异步请求
85 /*
86 第一个参数:请求对象
87 第二个参数:队列 决定代码块completionHandler的调用线程
88 第三个参数:completionHandler 当请求完成(成功|失败)的时候回调
89 response:响应头
90 data:响应体
91 connectionError:错误信息
92 */
93 [NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc]init] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
94
95
96 //4.解析数据
97 NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
98
99 NSHTTPURLResponse *res = (NSHTTPURLResponse *)response;
100 NSLog(@"%zd",res.statusCode);
101 NSLog(@"%@",[NSThread currentThread]);
102 }];
103 }
104
105 -(void)delegate
106 {
107 //1.确定请求路径
108 NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login?username=123&pwd=123&type=JSON"];
109
110 //2.创建请求对象
111 NSURLRequest *request = [NSURLRequest requestWithURL:url];
112
113 //3.设置代理,发送请求
114 //3.1
115 //[NSURLConnection connectionWithRequest:request delegate:self];
116
117 //3.2
118 //[[NSURLConnection alloc]initWithRequest:request delegate:self];
119
120 //3.3 设置代理,时候发送请求需要检查startImmediately的值
121 //(startImmediately == YES 会发送 | startImmediately == NO 则需要调用start方法)
122 NSURLConnection * connect = [[NSURLConnection alloc]initWithRequest:request delegate:self startImmediately:NO];
123
124 //调用开始方法
125 [connect start];
126
127 // [connect cancel];//取消
128 }
129
130 #pragma mark ----------------------
131 #pragma mark NSURLConnectionDataDelegate
132 //1.当接收到服务器响应的时候调用
133 -(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
134 {
135 NSLog(@"%s",__func__);
136 }
137
138 //2.接收到服务器返回数据的时候调用,调用多次
139 -(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
140 {
141 NSLog(@"%s",__func__);
142
143 //拼接数据
144 [self.resultData appendData:data];
145 }
146 //3.当请求失败的时候调用
147 -(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
148 {
149 NSLog(@"%s",__func__);
150 }
151
152 //4.请求结束的时候调用
153 -(void)connectionDidFinishLoading:(NSURLConnection *)connection
154 {
155 NSLog(@"%s",__func__);
156
157 NSLog(@"%@",[[NSString alloc]initWithData:self.resultData encoding:NSUTF8StringEncoding]);
158 }
159 @end
