我有一个scrollView,当我显示键盘时,我想向上滚动.
2014-09-29 14：48：50.738 swrd [1563：472888] – [swrd.EditPhotoViewController keyboardWasShown]：无法识别的选择器发送到实例0x14ed36640
这是我的代码,怎么了？
func registerForKeyboardNotifications ()-> Void {
NSNotificationCenter.defaultCenter().addObserver(self,selector: "keyboardWasShown",name: UIKeyboardDidShowNotification,object: nil)
NSNotificationCenter.defaultCenter().addObserver(self,selector: "keyboardWillBeHidden",name: UIKeyboardWillHideNotification,object: nil)
}
func deregisterFromKeyboardNotifications () -> Void {
let center: NSNotificationCenter = NSNotificationCenter.defaultCenter()
center.removeObserver(self,name: UIKeyboardDidHideNotification,object: nil)
center.removeObserver(self,object: nil)
}
func keyboardWasShown (notification: NSNotification) {
let info : NSDictionary = notification.userInfo!
let keyboardSize = info.objectForKey(UIKeyboardFrameBeginUserInfoKey)?.frame
let insets: UIEdgeInsets = UIEdgeInsetsMake(self.scrollView.contentInset.top,keyboardSize!.height,0)
self.scrollView.contentInset = insets
self.scrollView.scrollIndicatorInsets = insets
self.scrollView.contentOffset = CGPointMake(self.scrollView.contentOffset.x,self.scrollView.contentOffset.y + keyboardSize!.height)
}
func keyboardWillBeHidden (notification: NSNotification) {
let info : NSDictionary = notification.userInfo!
let keyboardSize = info.objectForKey(UIKeyboardFrameBeginUserInfoKey)?.frame
let insets: UIEdgeInsets = UIEdgeInsetsMake(self.scrollView.contentInset.top,0)
self.scrollView.contentInset = insets
self.scrollView.scrollIndicatorInsets = insets
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(true)
self.registerForKeyboardNotifications()
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(true)
self.deregisterFromKeyboardNotifications()
}
