GET/POST请求

NSLog(@"get同步!");
   
    NSString *urlStr = @"http://api.map.baidu.com/place/v2/search?query=银行®ion=大连&output=json&ak=6E823f587c95f0148c19993539b99295";
   
    //对中文进行编码
    NSString *urlStrEcode = [urlStrstringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
   
    //1.创建url地址
    NSURL *url = [NSURLURLWithString: urlStrEcode];
   
    //2.创建请求对象
    NSMutableURLRequest*request = [NSMutableURLRequestrequestWithURL:url];
   
    //创建服务器响应信息对象
    NSURLResponse*response =nil;
   
    //创建错误信息对象
    NSError *error = nil;
   
    //3.向服务器发送请求
    NSData *data =[NSURLConnectionsendSynchronousRequest:requestreturningResponse:&responseerror:&error];
   
    NSMutableDictionary*dic =[NSJSONSerializationJSONObjectWithData:dataoptions:NSJSONReadingMutableContainerserror:nil];
    NSLog(@"dic = %@", dic);
    NSLog(@"response = %@", response);
    NSLog(@"----------------------------------");

    NSLog(@"error = %@", error);

NSLog(@"post同步!");
    NSString *str = @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx";
   
    //post方法是地址参数分离的
    NSURL *url = [NSURLURLWithString:str];
    NSMutableURLRequest*request = [NSMutableURLRequestrequestWithURL:url];
   
    //设置请求方式为post
    [request setHTTPMethod:@"POST"];
   
    //设置参数转化成data型
    NSString *bodyStr =@"date=20131129&startRecord=5&len=5&udid=1234567890&terminalType=Iphone&cid=215";
   
    NSData *bodyData = [bodyStr dataUsingEncoding:NSUTF8StringEncoding];
   
    //设置请求对象为body体
    [request setHTTPBody:bodyData];
   
    NSURLResponse*response =nil;
    NSError *error = nil;
   
    //向服务器发送请求
    NSData *data = [NSURLConnectionsendSynchronousRequest:requestreturningResponse:&responseerror:&error];
   
    NSMutableDictionary*dic = [NSJSONSerializationJSONObjectWithData:dataoptions:NSJSONReadingMutableContainerserror:nil];
    NSLog(@"dic = %@", dic);

    NSLog(@"response = %@", response);

NSLog(@"get异步!");
    //NSString *str = @"http://project.lanou3g.com/teacher/yihuiyun/phpJSON.php";
   
    NSString *str =@"http://img4.duitang.com/uploads/item/201207/28/20120728105310_jvAjW.thumb.600_0.jpeg";
    NSURL *url = [NSURLURLWithString:str];
   
    NSMutableURLRequest*request = [NSMutableURLRequestrequestWithURL:url];
   
#pragma mark 设置异步请求代理(get异步)
    [NSURLConnectionconnectionWithRequest:requestdelegate:self];

#pragma mark --收到服务器响应(get异步)
- (void)connection:(NSURLConnection*)connection didReceiveResponse:(NSURLResponse*)response
{
    //初始化data属性
    self.data= [NSMutableDatadata];

}

#pragma mark --接收数据(get异步)
- (void)connection:(NSURLConnection*)connection didReceiveData:(NSData*)data
{
    //接受data对象
    [self.dataappendData:data];
}

#pragma mark --数据请求完成(get异步)
- (void)connectionDidFinishLoading:(NSURLConnection*)connection
{
//    NSMutableArray *array = [NSJSONSerialization JSONObjectWithData:self.data options:NSJSONReadingMutableContainers error:nil];
//    NSLog(@"array = %@", array);
   
   
    //显示图片
    self.imageview.image= [UIImageimageWithData:self.data];
   
}

#pragma mark --数据请求失败(get异步)
- (void)connection:(NSURLConnection*)connection didFailWithError:(NSError*)error
{
    NSLog(@"error = %@", error);
    NSLog(@"connection = %@", connection);
}


#pragma mark -- post异步
- (void)buttonAction3:(UIButton*)button
{
    NSLog(@"post异步!");
   
    NSString *str = @"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx";
    NSURL *url = [NSURLURLWithString:str];
   
    NSMutableURLRequest*request = [NSMutableURLRequestrequestWithURL:url];
   
    [request setHTTPMethod:@"POST"];
   
    NSString *bodyStr =@"date=20131129&startRecord=5&len=5&udid=1234567890&terminalType=Iphone&cid=215";
   
    NSData *data = [bodyStr dataUsingEncoding:NSUTF8StringEncoding];
   
    [request setHTTPBody:data];
   
   
    //post 异步请求 block
    //参数1.request对象
    //参数2.多线程队列NSOperationQueue对象
    [NSURLConnectionsendAsynchronousRequest:requestqueue:[NSOperationQueuemainQueue]completionHandler:^(NSURLResponse*response,NSData *data,NSError*connectionError){
       
#pragma mark --遇到block一定要会调回来的参数就是你需要的数据
       
        NSMutableDictionary*dic = [NSJSONSerializationJSONObjectWithData:dataoptions:NSJSONReadingMutableContainerserror:nil];
        NSLog(@"dic = %@", dic);

    }];

}