@objc func keyboardWasShown(_ notification:NSNotification) {
var userinfo = notification.userInfo!
let kbSize:NSValue = userinfo[UIKeyboardFrameBeginUserInfoKey] as! NSValue
let kbRectSize = kbSize.cgRectValue
let edgeInsects = UIEdgeInsetsMake(0, 0,kbRectSize.height + 10, 0)
self.scrollView.contentInset = edgeInsects
self.scrollView.scrollIndicatorInsets = edgeInsects
// active text field
var aRect:CGRect = self.view.frame
aRect.size.height -= kbRectSize.height
if(!aRect.contains(activeField.frame.origin)){
scrollView.isScrollEnabled = true
scrollView.scrollRectToVisible(activeField.frame, animated: true)
aRect = CGRect.zero
}
}
ScrollView 将按预期第一次滚动,然后变得无响应。 代码在 Xcode 8.3 之前运行良好,没有任何问题。
请确认这是否是错误以及如何规避它。提前致谢。
最佳答案
我也遇到了同样的问题,通过做一些改变,它工作正常。在您的场景中尝试下面的代码,看看它是否有效:
@objc func keyboardWasShown(_ notification:NSNotification) {
var keyboardHeight: CGFloat = 260
var userinfo = notification.userInfo!
let keyboardSize = (userinfo[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.size
if keyboardSize!.height > 10.0{
keyboardHeight = keyboardSize!.height
}
let edgeInsects = UIEdgeInsetsMake(0, 0, keyboardHeight + 10, 0)
self.scrollView.contentInset = edgeInsects
self.scrollView.scrollIndicatorInsets = edgeInsects
// active text field
var aRect:CGRect = self.view.frame
aRect.size.height -= kbRectSize.height
if(!aRect.contains(activeField.frame.origin)){
scrollView.isScrollEnabled = true
scrollView.scrollRectToVisible(activeField.frame, animated: true)
aRect = CGRect.zero
}
}
我在我的项目中使用了以下代码来注册屏幕,它工作得很好:
func keyboardWasShown(notification: NSNotification){
//Need to calculate keyboard exact size due to Apple suggestions
var keyboardHeight: CGFloat = 260
self.scrollView.isScrollEnabled = true
var info = notification.userInfo!
let keyboardSize = (info[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue.size
if keyboardSize!.height > 10.0{
keyboardHeight = keyboardSize!.height
}
let contentInsets : UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, keyboardHeight, 0.0)
self.scrollView.contentInset = contentInsets
self.scrollView.scrollIndicatorInsets = contentInsets
var aRect : CGRect = self.view.frame
aRect.size.height -= keyboardHeight
if let activeField = self.activeField {
if (!aRect.contains(activeField.frame.origin)){
self.scrollView.scrollRectToVisible(activeField.frame, animated: true)
}
}
}
func keyboardWillBeHidden(notification: NSNotification){
//Once keyboard disappears, restore original positions
self.scrollView.contentInset = UIEdgeInsets.zero
self.scrollView.scrollIndicatorInsets = UIEdgeInsets.zero
self.scrollView.isScrollEnabled = false
}
只需根据您的要求尝试和调试更多更改即可。希望它有效。
关于ios - Xcode 9 中的 UIKeyboard Notification.userInfo 关键错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46751348/