场景: 自定义cell内部通过Autolayout 布局, 使cell content 能够自动撑开。
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| cell.editCallBack = {[weak self] in
guard let self = self else { return }
UIView.performWithoutAnimation {
self.tableView.beginUpdates()
self.tableView.endUpdates()
self.tableView.scrollToRow(at: indexPath, at: .bottom, animated: false)
}
}
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| UIView.performWithoutAnimation {
}
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上面代码能够主线程刷新 cell 布局 , 并且没有闪屏幕情况。
监听键盘的弹出
别忘了移除监听。
首先要拿到键盘的高度,
然后tableview距离底部高度( 一般都是安全区域的高度, 全屏显示 ),
得到差值就是 contentEdgeInset 要偏移的高度 。
let deltaHeight = keyboardSize!.height - tableViewBottomSpace
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| NotificationCenter.default.rx
.notification(UIResponder.keyboardWillShowNotification)
.subscribe(onNext: {[weak self] notification in
guard let self = self,
let userInfo = notification.userInfo else { return }
let deltaHeight = keyboardSize!.height - tableViewBottomSpace
let keyboardValue = userInfo[UIResponder.keyboardFrameEndUserInfoKey]
let keyboardSize = (keyboardValue as AnyObject).cgRectValue?.size
let duration = (userInfo[UIResponder.keyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue
let tableViewBottomSpace: CGFloat = 114
UIView.animate(withDuration: duration ?? 0.5) {
self.tableView.contentInset = UIEdgeInsets(top: 0,
left: 0,
bottom: deltaHeight,
right: 0)
}
}).disposed(by: disposeBag)
NotificationCenter.default.rx
.notification(UIResponder.keyboardWillHideNotification)
.subscribe(onNext: {[weak self] notification in
guard let self = self else { return }
let duration = (notification.userInfo?[UIResponder.keyboardWillHideNotification] as? NSNumber)?.doubleValue
UIView.animate(withDuration: duration ?? 0.5) {
self.tableView.contentInset = UIEdgeInsets.zero
}
}).disposed(by: disposeBag)
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最后移除对键盘的监听
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| deinit {
notificationCenter.default.removeObserver(self)
}
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