UIView popup和textField

Question

嗨我遇到textfields和setAnimationDuration的问题，当我点击文本时它就像这样

https://vid.me/DU50

这是代码

-(IBAction)open:(id)sender{

    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5];
    [UIView setAnimationDelay:0.0];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];

    view1.frame = CGRectMake(0, 63, 320, 568);

}