本文介绍了如何从UICollectionViewCell呈现AlertView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
我在标题中使用带有Map的UICollectionView。
I am using a UICollectionView with a Map in the header.
我想处理核心位置错误。我有3种错误类型,其中两种我想呈现 UIAlertView
。
I want to handle Core Location errors. I have 3 error types and for two of them I want to present a UIAlertView
.
但我得到的是错误,因为 UICollectionViewCell
没有名为的成员presentViewController
。
But I am getting an error, because UICollectionViewCell
doesn't have a member called presentViewController
.
func locationUnknown() {
var alert = UIAlertController(title: "Location Unknown", message: "Please try again later.", preferredStyle: UIAlertControllerStyle.Alert)
let alertAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: { (action: UIAlertAction!) -> Void in
})
alert.addAction(alertAction)
self.presentViewController(alert, animated:true, completion: nil)
}
如何将此 UIAlertView
发送到 UICollectionView
的屏幕?
How can I send this UIAlertView
to the UICollectionView
's screen?
推荐答案
使用窗口的根视图控制器显示警告:
Use the window's root view controller to present the alert:
self.window?.rootViewController?.present(alert, animated: true, completion: nil)
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