在显示/隐藏键盘iOS11上滚动UITableView

时间:2017-10-14 10:45:22

标签: ios swift uitableview keyboard

我正在使用以下代码在显示/隐藏键盘时滚动UITableView及其页脚。它在iOS 10中与我一起运行良好,但是一旦我更新到iOS 11,滚动效果不佳。

代码:

func registerNotificationObservers()
{      
    NotificationCenter.default.addObserver(self, selector: #selector(ArticleDetailsVC.keyboardWillShow), name: .UIKeyboardWillShow, object: nil)
    NotificationCenter.default.addObserver(self, selector:#selector(ArticleDetailsVC.keyboardWillHide), name: .UIKeyboardWillHide, object: nil)
}

func removeNotificationObservers()
{
    NotificationCenter.default.removeObserver(self, name: .UIKeyboardWillShow, object: nil)
    NotificationCenter.default.removeObserver(self, name: .UIKeyboardWillHide, object: nil)
}

@objc func keyboardWillShow(_ notification: Notification) {
    print("keyboardWillShow")
    if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue
    {
        if self.commentsTableView.frame.origin.y == 0{
            print("keyboardWillShow ..")
            self.tableViewFooter.frame.origin.y -= keyboardSize.height - 50
            self.commentsTableView.frame.origin.y -= keyboardSize.height

        }


    }
}


@objc func keyboardWillHide(_ notification: Notification) {
    print("keyboardWillHide")

    if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue
    {
        if self.commentsTableView.frame.origin.y != 0{

            print("keyboardWillHide ..")
            self.tableViewFooter.frame.origin.y += keyboardSize.height + 50
            self.commentsTableView.frame.origin.y += keyboardSize.height   
        }  

    }
}

希望能解决这个问题。

3 个答案:

答案 0 :(得分:0)

添加以下行后(通常在viewDidLoad()中),tableView的行为将与iOS 10相同:

    if #available(iOS 11.0, *) {
        self.commentsTableView.contentInsetAdjustmentBehavior = .never
    }

答案 1 :(得分:0)

UITableView继承UIScrollView时,您可以使用下面的UIScrollViewDelegate函数:

 func scrollViewDidScroll(_ scrollView: UIScrollView) 
 {
        if scrollView == self.tableView
        {
            // show/hide Keyboard
        } 
 }

答案 2 :(得分:0)

将断点放在下如果让我自己看到keyboardSize ,对于UIKeyboardFrameBeginUserInfoKey键盘高度可能是0.0

UIKeyboardFrameBeginUserInfoKey 更改为 UIKeyboardFrameEndUserInfoKey 帮助我解决了这种情况

所以你的代码:

@objc func keyboardWillShow(_ notification: Notification) {
    print("keyboardWillShow")
    if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue
    {
        if self.commentsTableView.frame.origin.y == 0{
            print("keyboardWillShow ..")
            self.tableViewFooter.frame.origin.y -= keyboardSize.height - 50
            self.commentsTableView.frame.origin.y -= keyboardSize.height

        }
    }
}

希望它也能解决你的问题

对于 keyboardWillHide 方法,我已将其保留为 UIKeyboardFrameBeginUserInfoKey ,因为它没有问题