我在故事板中有一个文本视图和文本域。当文本域或文本视图显示键盘时，我想向上移动滚动视图。对UITextField来说，每件事都很好，但对于textView来说，这不起作用。我的代码是向上移动视图：
func keyboardWillShow(notification: NSNotification) {
if let endFrame = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
var keyboardHeight = view.bounds.height - endFrame.origin.y
if #available(iOS 11, *) {
if keyboardHeight > 0 {
keyboardHeight = keyboardHeight - view.safeAreaInsets.bottom
var contentInset:UIEdgeInsets = self.scrollView.contentInset
contentInset.bottom = keyboardHeight
viewBottom.constant = keyboardHeight
self.scrollView.contentInset = contentInset
}
}
else {
let keyboardSize = (notification.userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue).cgRectValue.size
var contentInset:UIEdgeInsets = self.scrollView.contentInset
contentInset.bottom = (keyboardSize.height)
self.scrollView.contentInset = contentInset
}
view.layoutIfNeeded()
}
}
func keyboardWillHide(notification: NSNotification) {
var contentInset:UIEdgeInsets = self.scrollView.contentInset
contentInset.bottom = 0
self.scrollView.contentInset = contentInset
}
显示键盘的textfield和textView有什么区别？
当我点击textview的方法调用和滚动视图内容插入时，与点击textfield相同，但视图不向上移动。
如何解决这个问题？
最佳答案
class matchViewController: UIViewController,UITextViewDelegate {
var activeTextview: UITextView?
@IBOutlet weak var yourTextview: UITextView!
@IBOutlet weak var scrollView: UIScrollView!
override func viewDidLoad() {
super.viewDidLoad()
yourTextview.delegate=self
NotificationCenter.default.addObserver(self, selector: #selector(yourViewController.keyboardWillShow(_:)), name:NSNotification.Name.UIKeyboardWillShow, object: self.view.window)
NotificationCenter.default.addObserver(self, selector: #selector(yourViewController.keyboardWillHide(_:)), name:NSNotification.Name.UIKeyboardWillHide, object: self.view.window)
}
@objc func keyboardWillShow(_ sender: Notification) {
var info: [AnyHashable : Any] = sender.userInfo!
let kbSize: CGSize = ((info[UIKeyboardFrameEndUserInfoKey]! as AnyObject).cgRectValue.size)
let contentInsets: UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0)
scrollView.contentInset = contentInsets
scrollView.scrollIndicatorInsets = contentInsets
var aRect: CGRect = self.view.frame
aRect.size.height -= kbSize.height
if let activeTextview=activeTextview{
self.scrollView.scrollRectToVisible((activeTextview.frame), animated: true)
}
}
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?){
view.endEditing(true)
super.touchesBegan(touches, with: event)
}
@objc func keyboardWillHide(_ sender: Notification) {
let userInfo: [AnyHashable: Any] = sender.userInfo!
let keyboardSize: CGSize = (userInfo[UIKeyboardFrameBeginUserInfoKey]! as AnyObject).cgRectValue.size
self.scrollView.frame.origin.y += keyboardSize.height
}
override func viewDidDisappear(_ animated: Bool) {
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillShow, object: self.view.window)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillHide, object: self.view.window)
}
func textViewDidBeginEditing(_ textView: UITextView) {
activeTextview=textView
}
func textViewDidEndEditing(_ textView: UITextView){
activeTextview=nil
}
}