ios - 键盘和文本字段一起动画进入 View

Question

我想在 NumberPad 上方有一个文本字段，以便在点击 showKeyboard 时，UIView(带有文本字段和“添加”按钮)+ NumberPad 一起动画到 View 中。我可以让他们分别看到，但不能同时看到。我不确定会发生什么。如果我按一次 showKeyboard，就会出现 numberPad，如果我再次按下 UIView(带有文本字段和“添加”按钮)就会动画化到 View 中。我怎样才能让 numberPad 和 UIView 一起过渡到 View 中？非常感谢任何帮助!

class ViewController: UIViewController{

    @IBOutlet var showKeyboard: UIButton!
    @IBOutlet var containerView: UIView!
    @IBOutlet var inputField: UITextField!
    @IBOutlet var addData: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    @IBAction func didTapshowKeyboard(sender: AnyObject) {

        inputField.keyboardType = UIKeyboardType.NumberPad
        inputField.becomeFirstResponder()

        let height = containerView.frame.size.height
        let width = containerView.frame.size.width

        //New X Position (same)
        let xPosition = containerView.frame.origin.x // i.e. 0

        //New Y position
        let yPosition = containerView.frame.origin.y - 270

        UIView.animateWithDuration(0.3, animations: {
            self.containerView.frame = CGRect(x: 0, y: yPosition, width: width , height: height) })

        println("tapped")
    }
}

Answer 1

您应该在 keyboardWillShow 通知器中进行所有动画计算:(将 _textField 替换为包含您要显示的所有元素的 View 。请注意，一旦您的文本字段成为第一响应者，此方法就会触发)。

- (void)keyboardWillShow:(NSNotification *)notification {
     //this is the time interval for the animation time
    NSTimeInterval animationDuration = [[[notification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
    NSInteger animationCurve = [[[notification userInfo] objectForKey:UIKeyboardAnimationCurveUserInfoKey] integerValue];
    //Get the keyboard frame to calculate your UITextField position
    CGRect keybFrame = [[[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey]CGRectValue];

   //set the textField frame to bottom of screen, before animating it up with the keyboard
   _textField.frame = CGRectMake(0, self.view.frame.size.height, self.view.frame.size.width, kTextFieldHeight);

   //setting a new frame to the textField
   CGRect frame = CGRectMake(0, (self.view.frame.size.height - keybFrame.size.height) - kTextFieldHeight, self.view.frame.size.width, kTextFieldHeight);

   [UIView animateWithDuration:animationDuration delay:0.0 options:animationCurve animations:^{
        //Making it visible
       _textField.alpha = 1.0;
       _textField.frame = frame;
   } completion:^(BOOL finished) {}];
}