ios - 由于在其中添加了文本字段，警报视图向上移动

Question

我正在单击按钮创建警报视图。我在其中放置了一个 UITextfield。但是警报视图在屏幕上向上移动。我无法将它带回屏幕中央。

这是我的代码和屏幕截图。

创建此警报视图的代码是这样的：-

- (IBAction)btn_cancelAppointment_click:(id)sender
{
    // Here We are Creating Alertview which asks for
    UIAlertView* cancelAlert = [[UIAlertView alloc] init];

    [cancelAlert setDelegate:self];
    [cancelAlert setTitle:@"Are you sure you want to request cancellation of this appointment?"];
    [cancelAlert setMessage:@"                             "];
    [cancelAlert addButtonWithTitle:@"NO"];
    [cancelAlert addButtonWithTitle:@"YES"];

    UITextField * txt_cancelNote = [[UITextField alloc] initWithFrame:CGRectMake(20.0, 88.0, 245.0, 30.0)];

    [txt_cancelNote setBackgroundColor:[UIColor whiteColor]];
    [txt_cancelNote setBorderStyle:UITextBorderStyleRoundedRect];
    [txt_cancelNote setPlaceholder:@"Enter cancellation note"];
    txt_cancelNote.tag = 11;

    [cancelAlert addSubview:txt_cancelNote];
    cancelAlert.delegate = self;
    [cancelAlert show];
}

所以，如果有人能告诉我如何把它带回屏幕的中心。任何帮助将不胜感激。

Answer 1

通过设置的transform属性尝试一下UIAlertView

  UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"Test" message:nil delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
  alertView.transform = CGAffineTransformMakeTranslation(x, y);