การสร้าง Message Box หรือ Alert ด้วย UIAlertView บน iOS (iPhone,iPad)

UIAlertView *welcomemessage =[[UIAlertView alloc] initWithTitle:@"Title" message:@"Message" delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
    [welcomemessage show];

- (IBAction)Hello:(id)sender {
    
    NSString *hello = @"สวัสดีครับคุณ ";
    NSString *name = txtName.text;
    NSString *message;
    message = [hello stringByAppendingString:name];
    
    lblResponse.text = message;
    
    
    UIAlertView *welcomemessage =[[UIAlertView alloc] initWithTitle:hello message:name delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
    [welcomemessage show];
    
}