IOS网络请求中文转码

-(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]);
    }];

}