ASI中POST请求和文件下载

//POST请求
 1 - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    // 1.URL
    NSURL *url = [NSURL URLWithString:@"http://localhost:8080/MJServer/login"];
    
    // 2.创建一个请求对象
    ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
    
    // 3.设置请求参数(建议使用setPostValue多一点)
    [request setPostValue:@"123" forKey:@"username"];
    [request setPostValue:@"123" forKey:@"pwd"];
    
    // 4.开始请求
    [request startAsynchronous];
    
    // 5.设置监听方法
    __weak typeof(request) weakRequest = request;
    [request setCompletionBlock:^{
        NSLog(@"请求完毕--%@", [weakRequest responseString]);
    }];
}

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