2016 - 1- 22 NSURLConnetction --- POST请求

    NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/login"];
    
    // 创建请求
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    
    request.HTTPMethod = @"POST";// 设置为POST请求
    
    request.HTTPBody = [@"username=122&pwd=1222" dataUsingEncoding:NSUTF8StringEncoding];// 设置请求体,需要注意将字符串转换为DATA
    
    // 发送请求
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
        NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"%@",str);
    }];