-(void)get

{

    NSString *urlStr = @"http://120.25.226.186:32812/login2?username=小码哥&pwd=520it&type=JSON";

    NSLog(@"转码前: %@",urlStr);

    //中文转码处理

    urlStr =  [urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    NSLog(@"转码后: %@",urlStr);

    //1.url

    NSURL *url = [NSURL URLWithString:urlStr];

    //http://120.25.226.186:32812/login2?username=%E5%B0%8F%E7%A0%81%E5%93%A5&pwd=520it&type=JSON

    NSLog(@"url------%@",url);

    //2.urlrequest

    NSURLRequest *request = [NSURLRequest requestWithURL:url];

    //3.connect

    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {

        //容错处理

        if (connectionError) {

            NSLog(@"%@",connectionError);

            return ;

        }

        //4.解析

        NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);

    }];

}

-(void)post

{

    //观察URL中是否有中文,如果有中文则需要转码

    NSString *urlStr = @"http://120.25.226.186:32812/login2";

    //username=小码哥&pwd=520it&type=JSON

    //1.url

    NSURL *url = [NSURL URLWithString:urlStr];

    //2.urlrequest

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

    //2.1 post

    request.HTTPMethod = @"POST";

    //2.2 body

    request.HTTPBody = [@"username=小码哥&pwd=520it&type=JSON" dataUsingEncoding:NSUTF8StringEncoding];

    //3.connect

    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {

        //容错处理

        if (connectionError) {

            NSLog(@"%@",connectionError);

            return ;

        }

        //4.解析

        NSLog(@"%@",[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding]);

    }];

}