get请求的block方法

    //  get请求

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

   NSURLRequest * requset = [NSURLRequestrequestWithURL:url];

    

    //异步方法

    NSOperationQueue * queue = [NSOperationQueuemainQueue]

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

       NSLog(@"%li",data.length);

    NSLog(@"%@", [NSThreadcurrentThread]);

    }];

    

    //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);