[英]UITableView Scrolling/Inset Issue
我有一个带有多个文本字段的UITableView。 当我单击文本字段时,我设置了ContentOffset以将文本字段带到页面的顶部,但是当键盘出现时,我没有足够的插图来这样做。 因此,我在视图底部添加了插图。 这使我可以一直向下滚动,但是现在当我选择一个字段时,它向下滚动的距离比我设置的setContentOffset还要远。 我尝试了不同的内容插入值,但是没有用。 有没有办法解决此内容插入问题?
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
}
我已经在SO上找到了它,但是现在找不到它的链接,这里的代码非常巧妙地处理了键盘和tableview的插图。 好东西是用于显示和隐藏。 无需实施其他键盘通知:
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)
}
就您的解决方案而言,您可以替换以下两行:
var adjustmentHeight = (keyboardFrame.height + 100) * (show ? 1 : -1)
adjustmentHeight = (adjustmentHeight < 0.0) ? 0.0 : adjustmentHeight
有:
var adjustmentHeight = keyboardFrame.height * (show ? 1 : 0)
并且要确保您还将top inset设置为0,请执行以下操作:
let contentInsets = UIEdgeInsetsMake(0, 0, adjustmentHeight, 0)
self.editPaymentTableView.contentInset = contentInsets
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