我的工具栏左侧有UIBarButtomItem
,标签为Admin
我需要在点击它时显示一个弹出框,但它出现在错误的位置,它出现在屏幕的左上角:
这是打开popover的功能:
// this IBAction is assigned only to the Admin bar button item
@IBAction func openAdmin(sender: UIBarButtonItem) {
let alertController = UIAlertController(title: nil, message: "Elige una opción", preferredStyle: .ActionSheet)
// action button initializations... ... ...
let barButtonItemSize = sender.valueForKey("view")
alertController.popoverPresentationController?.sourceView = self.view
alertController.popoverPresentationController?.sourceRect = barButtonItemSize!.frame
presentViewController(alertController, animated: true, completion: nil)
}
当我触摸管理栏按钮时,我也会在控制台上收到此警告:
快照未呈现的视图会导致空快照。确保您的视图在屏幕更新后的快照或快照之前至少呈现一次
我做错了什么?或者我需要做什么才能在管理员的顶部显示popover?
答案 0 :(得分:5)
替换
alertController.popoverPresentationController?.sourceView = self.view
alertController.popoverPresentationController?.sourceRect = barButtonItemSize!.frame
与
alertController.popoverPresentationController?.sourceView = sender
alertController.popoverPresentationController?.barButtonItem = sender