ios - 出现键盘时快速移动 View

Question

我的 View 中有六个 UITextField，我想决定 View 是否必须移动。如何在移动 View 之前检查选择了哪个 TextField？

这就是我显示键盘和移动 View 的代码:

    NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name: UIKeyboardWillShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)

func keyboardWillShow(notification: NSNotification) {
            if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
                self.view.frame.origin.y -= keyboardSize.height - 85
            }
    }

    func keyboardWillHide(notification: NSNotification) {
            if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
                self.view.frame.origin.y += keyboardSize.height - 85
            }
    }

Answer 1

如果您想知道选择了哪个UITextField，可以使用textFieldDidBeginEditing和textFieldDidEndEditing

func textFieldDidBeginEditing(textField: UITextField!) {
    currentSelectedTextField = textField
}

func textFieldDidEndEditing(textField: UITextField!) {
    currentSelectedTextField = nil
}

关于如何在选择 UITextField 时管理键盘的引用:https://developer.apple.com/library/ios/documentation/StringsTextFonts/Conceptual/TextAndWebiPhoneOS/KeyboardManagement/KeyboardManagement.html