Swift 找出UIKeyboard.frame何时与其他帧相交？

我需要找出textfield何时成为第一响应者，以通知我即将显示的键盘是否会妨碍UITextField。如果有，我想调整scrollview属性

到目前为止，我有这个设置。我正在侦听调用以下选择器的UIKeyboardWillShow通知：

func keyboardWillAppear(notification:NSNotification)
{
    if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue
    {

        if keyboardSize.intersects(textField.frame)
        {
            print("It intersects")
        }
        else
        {
            print("Houston, we have a problem")
        }
    }

注意：我尝试了UIKeyboardDidShow，但仍然没有成功。UITextField是scrollView的子视图

听键盘大小的变化

转换坐标

工作样本：

 @IBOutlet weak var textView: UITextView!
 override func viewDidLoad() {
    super.viewDidLoad()

    //keyboard observers
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChange), name: NSNotification.Name.UIKeyboardWillChangeFrame, object: nil)
}

func keyboardWillChange(notification:NSNotification)
{
    print("Keyboard size changed")

    if let keyboardSize = notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? CGRect {
        //convert gotten rect
        let r = self.view.convert(keyboardSize, from: nil)

        //test it
        if r.intersects(textView.frame) {
            print("intersects!!!")
        }
    }
}

func keyboardWillAppear(notification:NSNotification)
{
    if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue
    {
        if keyboardSize.origin.y < textField.frame.origin.y + textField.frame.size.height {
             print("It intersects")
        } else {
            print("Houston, we have a problem")
        }
    }
}

---

比较一下键盘的起始位置和文本的结束位置如何

工作样本：

 @IBOutlet weak var textView: UITextView!
 override func viewDidLoad() {
    super.viewDidLoad()

    //keyboard observers
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChange), name: NSNotification.Name.UIKeyboardWillChangeFrame, object: nil)
}

func keyboardWillChange(notification:NSNotification)
{
    print("Keyboard size changed")

    if let keyboardSize = notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? CGRect {
        //convert gotten rect
        let r = self.view.convert(keyboardSize, from: nil)

        //test it
        if r.intersects(textView.frame) {
            print("intersects!!!")
        }
    }
}

func keyboardWillAppear(notification:NSNotification)
{
    if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue
    {
        if keyboardSize.origin.y < textField.frame.origin.y + textField.frame.size.height {
             print("It intersects")
        } else {
            print("Houston, we have a problem")
        }
    }
}

func键盘将出现（通知：NSNotification）
{
如果让keyboardSize=（notification.userInfo？[UIKeyboardFrameEndUserInfoKey]作为？NSValue）？.cgRectValue
{
如果keyboardSize.origin.y

@Dalj Djan，这很有帮助。然而，我只需要在convert func中做一个小的调整，因此，将nil改为我的scrollView，因为我的textfield是scrollView的一个子视图。谢谢兄弟。