OC -网络请求 - NSURLConnection - POST

 1 #import "ViewController.h"
 2 
 3 @interface ViewController ()
 4 
 5 @end
 6 
 7 @implementation ViewController
 8 -(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
 9 {
10     [self post];
11 }
12 
13 -(void)post
14 {
15     //1.确定请求路径
16     NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login"];
17     
18     //2.创建可变请求对象
19     NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
20     
21     //3.修改请求方法,POST必须大写
22     request.HTTPMethod = @"POST";
23     
24     //设置属性,请求超时
25     request.timeoutInterval = 10;
26     
27     //设置请求头User-Agent
28     //注意:key一定要一致(用于传递数据给后台)
29     [request setValue:@"ios 10.1" forHTTPHeaderField:@"User-Agent"];
30     
31     //4.设置请求体信息,字符串--->NSData
32     request.HTTPBody = [@"username=520it&pwd=123&type=JSON" dataUsingEncoding:NSUTF8StringEncoding];
33     
34     //5.发送请求
35     [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
36        
37         //6.解析数据,NSData --->NSString
38         NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);
39     }];
40 }
41 
42 @end