NSURLConnection-中国語URL処理

urlの中に直接中国語があって、何の処理もしないと解析できなくて、空に戻ります。トランスコードが必要です

//    URL    
    urlStr = [urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

GET

- (void)get
{
    // 0.    
    NSString *urlStr = @"http://120.25.226.186:32812/login2?username=   &pwd=520it";
    //    URL    
    urlStr = [urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
    NSURL *url = [NSURL URLWithString:urlStr];
    
    // 1.      
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    
    // 2.    
    [NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
        // 3.          （      ）
        NSString *string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"%@", string);
    }];
}

POST

- (void)post
{
    // 0.    
    NSString *urlStr = @"http://120.25.226.186:32812/login2";
    NSURL *url = [NSURL URLWithString:urlStr];
    
    // 1.      
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    request.HTTPMethod = @"POST";
    request.HTTPBody = [@"username=   &pwd=520it" dataUsingEncoding:NSUTF8StringEncoding];
    
    // 2.    
    [NSURLConnection sendAsynchronousRequest:request queue:[[NSOperationQueue alloc] init] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
        // 3.          （      ）
        NSString *string = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"%@", string);
    }];
}