get请求的block方法

    //  get请求

    NSURL * url = [NSURL URLWithString:@"http://192.168.2.119/test2.zip"];

    NSURLRequest * requset = [NSURLRequest requestWithURL:url];

    

    //异步方法

    NSOperationQueue * queue = [NSOperationQueue mainQueue]

    [NSURLConnection sendAsynchronousRequest:requset queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {

        NSLog(@"%li",data.length);

    NSLog(@"%@", [NSThread currentThread]);

    }];

    

    //同步方法

//    NSURL * url = [NSURL URLWithString:@"http://192.168.2.162/logo.php?userName=jereh&pwd=123"];

//    NSURLRequest * requset = [NSURLRequest requestWithURL:url];

//    NSURLResponse * response;

//    NSData * data = [NSURLConnection sendSynchronousRequest:requset returningResponse:&response error:nil];

//    NSLog(@"%li",data.length);