我想添加除“确定”按钮以外的另一个按钮,该按钮应仅关闭警报。我希望其他按钮调用某个功能。
var logInErrorAlert: UIAlertView = UIAlertView() logInErrorAlert.title = "Ooops" logInErrorAlert.message = "Unable to log in." logInErrorAlert.addButtonWithTitle("Ok")
我如何在此警报中添加另一个按钮,然后单击该按钮,然后允许它调用一个函数,因此可以说我们希望新按钮进行调用:
retry()
Swifty方法是使用新的UIAlertController和闭包:
// Create the alert controller let alertController = UIAlertController(title: "Title", message: "Message", preferredStyle: .Alert) // Create the actions let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.Default) { UIAlertAction in NSLog("OK Pressed") } let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel) { UIAlertAction in NSLog("Cancel Pressed") } // Add the actions alertController.addAction(okAction) alertController.addAction(cancelAction) // Present the controller self.presentViewController(alertController, animated: true, completion: nil)
斯威夫特3:
// Create the alert controller let alertController = UIAlertController(title: "Title", message: "Message", preferredStyle: .alert) // Create the actions let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default) { UIAlertAction in NSLog("OK Pressed") } let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.cancel) { UIAlertAction in NSLog("Cancel Pressed") } // Add the actions alertController.addAction(okAction) alertController.addAction(cancelAction) // Present the controller self.present(alertController, animated: true, completion: nil)