import UIKitclass ViewController: UIViewController {override func viewDidLoad() {super.viewDidLoad()}override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {// 創建let alertController = UIAlertController(title: "提示", message: "你確定要離開？", preferredStyle:.Alert) // 設置2個UIAlertAction let cancelAction = UIAlertAction(title: "取消", style: .Cancel, handler: nil) let okAction = UIAlertAction(title: "好的", style: .Default) { (UIAlertAction) in print("點擊了好的") } // 添加 alertController.addAction(cancelAction) alertController.addAction(okAction) // 彈出 self.presentViewController(alertController, animated: true, completion: nil) } }

// 除了彈出，還可以使用底部向上滑出的樣式// 注意：如果上拉菜單中有『取消』按鈕的話，那么它永遠都會出現在菜單的底部，不管添加的次序如何// 創建// preferredStyle 為 ActionSheetlet alertController = UIAlertController(title: "保存或刪除數據", message: "刪除數據將不可恢復", preferredStyle:.ActionSheet) // 設置2個UIAlertAction let cancelAction = UIAlertAction(title: "取消", style: .Cancel, handler: nil) let deleteAction = UIAlertAction(title: "刪除", style: .Destructive, handler: nil) let saveAction = UIAlertAction(title: "保存", style: .Default, handler: nil) // 添加到UIAlertController alertController.addAction(cancelAction) alertController.addAction(saveAction) alertController.addAction(deleteAction) // 彈出 self.presentViewController(alertController, animated: true, completion: nil)

/*添加任意數量的文本輸入框（比如可以用來實現登錄框）*/let alertController = UIAlertController(title: "系統登錄", message: "請輸入用戶名和密碼", preferredStyle: UIAlertControllerStyle.Alert)alertController.addTextFieldWithConfigurationHandler { (textField:UITextField) in textField.placeholder = "用戶名" } alertController.addTextFieldWithConfigurationHandler { (textField:UITextField) in textField.placeholder = "密碼" textField.secureTextEntry = true } let cancelAction = UIAlertAction(title: "取消", style: UIAlertActionStyle.Cancel, handler: nil) let okAction = UIAlertAction(title: "好的", style: UIAlertActionStyle.Default) { (UIAlertAction) in let login = alertController.textFields![0] let pwd = alertController.textFields![1] print("用戶名：\(login.text) 密碼：\(pwd.text)") } alertController.addAction(cancelAction) alertController.addAction(okAction) // 彈出 self.presentViewController(alertController, animated: true, completion: nil)

轉載于:https://www.cnblogs.com/Free-Thinker/p/6372952.html

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