Swift 带键盘的快速移动视图
我试图在键盘出现时向上移动视图,在键盘隐藏时向下移动视图 我遇到的问题是高度似乎不同:KBH1输出216,KBH2输出260 这将导致视图向下移动的距离比最初移动的距离更远 我该如何纠正这一点Swift 带键盘的快速移动视图,swift,uikeyboard,Swift,Uikeyboard,我试图在键盘出现时向上移动视图,在键盘隐藏时向下移动视图 我遇到的问题是高度似乎不同:KBH1输出216,KBH2输出260 这将导致视图向下移动的距离比最初移动的距离更远 我该如何纠正这一点 extension UIViewController { func addKeyboardFunctions() { let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #
extension UIViewController {
func addKeyboardFunctions() {
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(dismissKeyboardEx))
// tap.cancelsTouchesInView = false
view.addGestureRecognizer(tap)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillDisappear), name: Notification.Name.UIKeyboardWillHide, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillAppear), name: Notification.Name.UIKeyboardWillShow, object: nil)
}
@objc func keyboardWillAppear(_ notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
if self.view.frame.origin.y == 0{
self.view.frame.origin.y -= keyboardSize.height
print("KBH: \(keyboardSize.height)")
}
}
}
@objc func keyboardWillDisappear(_ notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
if self.view.frame.origin.y != 0{
self.view.frame.origin.y += keyboardSize.height
print("KBH: \(keyboardSize.height)")
}
}
}
问题是您使用的是
UIKeyboardFrameBeginUserInfo
通知将为您提供开始帧和结束帧,因此您可以相应地移动视图。结束帧将是键盘动画结束的位置,因此它是最终位置。你应该用这个
我以前经常使用这个分机,我想它是给Swift 2的
func getKeyboardHeight(notification: NSNotification) -> CGFloat {
let userInfo = notification.userInfo
let keyboardSize = userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue
return keyboardSize.CGRectValue().height
}
您应该能够更新Swift 4,但最重要的部分是使用结束帧而不是开始视图控制器是否嵌入在导航控制器中?嗨,不,它在嵌入的视图中它是否包含导航栏?不,我问的是导航栏,因为两者之间的高度差是44,这是导航栏的高度。我相信这与此有关。