request网络访问请求-优快云博客

本文链接：https://blog.youkuaiyun.com/smilebigdear/article/details/44917441

本文介绍了在iOS开发中使用NSURLConnection进行网络请求的具体实现方法，包括如何构造URL、创建请求对象及执行异步请求，并展示了如何处理请求成功后的数据转换。

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request网络访问请求第一版本：

    //1、URL
    NSString *urlStr = @"http://www.kuaidi100.com/query?type=shunfeng&postid=134972345057";
    NSURL *url = [NSURL URLWithString:urlStr];
    
    //2、Request
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    
    //3、Connection(异步请求)
    [NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError)
    {
        //执行成功，将data转换成字符串
        NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"%@", str);
    }];

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request网络访问请求第二版：

    //1、URL
    NSString *urlStr = @"http://www.kuaidi100.com/query?type=shunfeng&postid=134972345057";
    NSURL *url = [NSURL URLWithString:urlStr];
    
    //2、Request
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    
    //3、Connection(异步请求)
    [NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError)
    {
        if (connectionError == nil)
        {
            //执行成功，将data转换成字符串
            NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
            NSLog(@"%@", str);
            
            //主线程更新
            [[NSOperationQueue mainQueue] addOperationWithBlock:^{
                
            }];
        }
        else
        {
            NSLog(@"fuck error with request %@", [connectionError domain]);
        }
    }];