本文介绍了如何在Swift中旋转UIAlertController的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个工作 UIAlertController
,但我想将 alert.view
旋转90度。
I have a working UIAlertController
, but I want to rotate the alert.view
by 90 degrees left.
我该怎么办?我的代码如下:
How can I do it? My code is here below:
let alert = UIAlertController(title: "", message: "Message Sample", preferredStyle: .Alert)
alert.addAction(UIAlertAction(title: "Okay", style: .Default){(action)->() in })
presentViewController(alert, animated: true) {}
我试图添加:
alert.view.transform = CGAffineTransformMakeRotation(CGFloat(M_PI_2))
但是它不起作用。
谢谢!
推荐答案
随着此代码:
let alert = UIAlertController(title: "", message: "Message Sample", preferredStyle: .Alert)
alert.addAction(UIAlertAction(title: "Okay", style: .Default){(action)->() in })
self.presentViewController(alert, animated: true, completion: {() -> Void in
alert.view.transform = CGAffineTransformMakeRotation(CGFloat(M_PI_2))
})
Swift3
let alert = UIAlertController(title: "", message: "Message Sample", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "Okay", style: .default){(action)->() in })
self.present(alert, animated: true, completion: {() -> Void in
alert.view.transform = CGAffineTransform(rotationAngle: CGFloat(Double.pi/2) )
})
你可以实现这个目标:
更新回答
self.presentViewController(alert, animated: true, completion: {() -> Void in
// alert.view.transform = CGAffineTransformMakeRotation(CGFloat(M_PI_2))
UIView.animateWithDuration(1.0, delay: 0, options: .CurveLinear, animations: { () -> Void in
alert.view.transform = CGAffineTransformMakeRotation(CGFloat(M_PI_2))
}) { (finished) -> Void in
// do something if you need
}
})
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