弃用的异步get和post方法之代理方法

 #import "ViewController.h"
 #import "Header.h"

 @interface ViewController () <NSURLConnectionDataDelegate>

 /**
  *  用来存储数据
  */
 @property (nonatomic, strong) NSMutableData *resultData;

 @property (nonatomic, strong) NSMutableArray *dataArray;

 @end

 @implementation ViewController

 // 懒加载
 - (NSMutableArray *)dataArray {

     if (!_dataArray) {
         _dataArray = [NSMutableArray array];
     }
     return _dataArray;
 }

 - (void)viewDidLoad {
     [super viewDidLoad];
     // Do any additional setup after loading the view, typically from a nib.
 }

 #pragma mark - get异步请求
 - (IBAction)getAsynchronousRequset:(UIButton *)sender {

     // 1.创建url
     NSURL *url = [NSURL URLWithString:GET_URL];

     // 2.创建请求
     NSURLRequest *request = [NSURLRequest requestWithURL:url];

     // 使用delegate实现
     [NSURLConnection connectionWithRequest:request delegate:self];

 }

 #pragma mark - 代理方法
 - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {

     // 初始化数据
     self.resultData = [NSMutableData data];

 }

 // 开始接收数据(这个方法会重复执行，得到的每段数据拼接在一起就可以了)
 - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {

     [self.resultData appendData:data];
 }

 // 结束服务器
 - (void)connectionDidFinishLoading:(NSURLConnection *)connection {

     // 进行数据解析
     NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:self.resultData options:NSJSONReadingAllowFragments error:nil];
     NSLog(@"%@", dic);
 }

 #pragma mark - post异步请求
 - (IBAction)postAsynchronousRequset:(UIButton *)sender {

     // 1.创建url
     NSURL *url = [NSURL URLWithString:POST_URL];

     // 2.创建请求
     NSMutableURLRequest *mutableRequest = [NSMutableURLRequest requestWithURL:url];

     // 2.5.设置body
     // 创建一个连接字符串（这个内容在以后的开发中接口文档都有标注）
     NSString *dataStr = POST_BODY;

     // 对连接字符串进行编码【这一步千万不能忘记】
     NSData *postData = [dataStr dataUsingEncoding:NSUTF8StringEncoding];

     // 设置请求格式为post请求【在这里POST必须大写】
     [mutableRequest setHTTPMethod:@"POST"];

     // 设置请求体（body）
     [mutableRequest setHTTPBody:postData];

     // 代理方法
     [NSURLConnection connectionWithRequest:mutableRequest delegate:self];
 }

 #pragma mark - 代理方法
 - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {

     // 初始化数据
     self.resultData = [NSMutableData data];

 }

 // 开始接收数据(这个方法会重复执行，得到的每段数据拼接在一起就可以了)
 - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {

     [self.resultData appendData:data];
 }

 // 结束服务器
 - (void)connectionDidFinishLoading:(NSURLConnection *)connection {

     // 进行数据解析
     NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:self.resultData options:NSJSONReadingAllowFragments error:nil];
     NSLog(@"%@", dic);
 }

 @end