UITableView滚动/插入问题

Question

我有一个具有多个文本框的UITableView。当我点击文本框时，我将setContentOffset设置为使文本框位于页面的顶部，但当键盘出现时，我没有足够的插入框来执行此操作。所以我在插图底部添加了插图。这使我可以一直向下滚动，但现在当我选择一个向下滚动的字段时，比我设置的setContentOffset更远。我试过不同的内容插值，但没有任何工作。有没有办法解决这个内容插入问题？

func adjustInsetForKeyboardShow(_ show: Bool, notification: Notification) { 
     if !keyboardAdjusted || !show { 
      guard let value = (notification as NSNotification).userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue else { return } 
      let keyboardFrame = value.cgRectValue 
      var adjustmentHeight = (keyboardFrame.height + 100) * (show ? 1 : -1) 
      adjustmentHeight = (adjustmentHeight < 0.0) ? 0.0 : adjustmentHeight 

      self.editPaymentTableView.contentInset.bottom = adjustmentHeight 
      self.editPaymentTableView.scrollIndicatorInsets.bottom = adjustmentHeight 
     } 
     keyboardAdjusted = show 
    } 

Answer 1

我前一段时间发现这对SO，但无法找到链接到它了，这里要说的是很整齐地处理键盘和tableview中的插图代码。好的是它是用于显示和隐藏的。无需执行其他键盘通知：

public func keyboardWillChangeFrame(notification: NSNotification) { 
    guard 
     let userInfo = notification.userInfo, 
     let endFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue, 
     let duration: TimeInterval = (userInfo[UIKeyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue, 
     let animationCurveRawNSNumber = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? NSNumber 
     else { 
      return 
    } 

    let animationCurveRaw = animationCurveRawNSNumber.uintValue 
    let animationCurve: UIViewAnimationOptions = UIViewAnimationOptions(rawValue: animationCurveRaw) 

    let offsetY: CGFloat 
    if endFrame.origin.y >= UIScreen.main.bounds.size.height { 
     offsetY = 0.0 
    } else { 
     offsetY = endFrame.size.height 
    } 

    let contentInsets = UIEdgeInsetsMake(0, 0, offsetY, 0) 
    UIView.animate(withDuration: duration, delay: TimeInterval(0), options: animationCurve, animations: { 
     self.tableView.contentInset = contentInsets 
     self.tableView.scrollIndicatorInsets = contentInsets 
    }, completion: nil) 
} 

在解决方案方面，可以取代这两条线路：

var adjustmentHeight = (keyboardFrame.height + 100) * (show ? 1 : -1) 
adjustmentHeight = (adjustmentHeight < 0.0) ? 0.0 : adjustmentHeight 

有：

var adjustmentHeight = keyboardFrame.height * (show ? 1 : 0) 

而且，以确保您'也将top插入到0做：

let contentInsets = UIEdgeInsetsMake(0, 0, adjustmentHeight, 0) 
self.editPaymentTableView.contentInset = contentInsets