我在编辑时根据 cell
内的 UITextView
光标位置具有 tableView 的自动滚动功能。
它适用于以前的 iOS 版本。从 iOS11 开始它就坏了。
我已经根据键盘高度设置了 tableView
contentInset
。对于自动滚动,我在 textViewDidChange
if let confirmedTextViewCursorPosition = textView.selectedTextRange?.end {
let caretPosition = textView.caretRect(for: confirmedTextViewCursorPosition)
var textViewActualPosition = tableView.convert(caretPosition, from: textView.superview?.superview)
textViewActualPosition.origin.y += 22.0
tableView.scrollRectToVisible(textViewActualPosition, animated: false)
}
最佳答案
Askh1t是正确的,这是我的实现:
var info = notification.userInfo!
var keyboardSize:CGRect = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue
if keyboardSize.size.height <= 0 { // to fix bug on iOS 11
keyboardSize = (info[UIKeyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
}
以及适合您的完整模块化实现:
//MARK: - Properties
var activeTextView: UITextView?
//MARK: - Scroll View Notifications
// add in viewDidLoad
func registerForKeyboardNotifications(){
//Adding notifies on keyboard appearing
NotificationCenter.default.addObserver(forName: Notification.Name.UIKeyboardWillShow, object: nil, queue: nil, using: keyboardWasShown)
NotificationCenter.default.addObserver(forName: Notification.Name.UIKeyboardWillHide, object: nil, queue: nil, using: keyboardWillBeHidden)
}
//add in viewWillDisappear
func deregisterFromKeyboardNotifications(){
//Removing notifies on keyboard appearing
NotificationCenter.default.removeObserver(self, name: Notification.Name.UIKeyboardDidShow, object: nil)
NotificationCenter.default.removeObserver(self, name: Notification.Name.UIKeyboardWillHide, object: nil)
}
func keyboardWasShown(notification: Notification) -> Void {
//Need to calculate keyboard exact size due to Apple suggestions
self.tableView.isScrollEnabled = true
var info = notification.userInfo!
var keyboardSize:CGRect = (info[UIKeyboardFrameBeginUserInfoKey] as! NSValue).cgRectValue
if keyboardSize.size.height <= 0 { // to fix bug on iOS 11
keyboardSize = (info[UIKeyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
}
self.tableView.contentInset.bottom = keyboardSize.height //add this much
self.tableView.scrollIndicatorInsets.bottom = keyboardSize.height //scroll too it.
var aRect : CGRect = self.view.frame
aRect.size.height -= keyboardSize.height
if let activeField = self.activeTextView {
if (!aRect.contains(activeField.frame.origin)){
self.tableView.scrollRectToVisible(activeField.frame, animated: true)
}
}
}
func keyboardWillBeHidden(notification: Notification){
self.tableView.contentInset.bottom = 0
self.tableView.isScrollEnabled = true
self.tableView.alwaysBounceVertical = true
}
func textViewDidBeginEditing(_ textView: UITextView){
activeTextView = textView
}
func textViewDidEndEditing(_ textView: UITextView){
tableView.isScrollEnabled = true
activeTextView = nil
}
关于ios - 自动滚动到放置在 UITableViewCell 内的 textView 光标在 iOS11 中不起作用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47708491/