在键盘背后移动内容不起作用，Swift

Question

在视图控制器中，我有UIImageView和多个uitextfields。我使用以下基于Apple文档的代码在调用键盘通知时将scrollView向上移动以推送隐藏的文本字段。然而，当键盘出现时，视图确实向上移动。 我在这里错过了什么吗？

class NewViewController: UIViewController, UITextFieldDelegate { 

@IBOutlet weak var scrollView: UIScrollView! 

var activeTextField: UITextField! 

override func viewDidLoad() { 
    super.viewDidLoad() 

    scrollView.contentSize.height = 1000 

} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
} 

func registerForKeyboardNotifications() { 
    let notificationCenter = NSNotificationCenter.defaultCenter() 
    notificationCenter.addObserver(self, selector: "keyboardWillBeShown:", name: UIKeyboardWillShowNotification, object: nil) 
    notificationCenter.addObserver(self, selector: "keyboardWillBeHidden:", name: UIKeyboardWillHideNotification, object: nil) 
} 

func keyboardWillBeShown(sender: NSNotification) { 
    let info: NSDictionary = sender.userInfo! 
    let value: NSValue = info.valueForKey(UIKeyboardFrameBeginUserInfoKey) as! NSValue 
    let keyboardSize: CGSize = value.CGRectValue().size 
    let contentInsets: UIEdgeInsets = UIEdgeInsetsMake(self.scrollView.contentInset.top, 0.0, keyboardSize.height, 0.0) 
    scrollView.contentInset = contentInsets 
    scrollView.scrollIndicatorInsets = contentInsets 


    var aRect: CGRect = self.view.frame 
    aRect.size.height -= keyboardSize.height 
    print(aRect) 

    let activeTextFieldRect: CGRect? = activeTextField?.frame 
    let activeTextFieldOrigin: CGPoint? = activeTextFieldRect?.origin 
    if (!CGRectContainsPoint(aRect, activeTextFieldOrigin!)) { 
     scrollView.scrollRectToVisible(activeTextFieldRect!, animated:true) 
    } 
} 


func keyboardWillBeHidden(sender: NSNotification) { 
    let contentInsets: UIEdgeInsets = UIEdgeInsetsZero 
    scrollView.contentInset = contentInsets 
    scrollView.scrollIndicatorInsets = contentInsets 
} 

func textFieldDidBeginEditing(textField: UITextField) { 
    activeTextField = textField 
} 

func textFieldDidEndEditing(textField: UITextField) { 
    activeTextField = nil 
} 

func textFieldShouldReturn(textField: UITextField) -> Bool { 
    textField.resignFirstResponder() 
    return true 
} 


override func viewWillAppear(animated: Bool) { 
    super.viewWillAppear(animated) 
    self.registerForKeyboardNotifications() 
} 

override func viewDidDisappear(animated: Bool) { 
    super.viewWillDisappear(animated) 
    NSNotificationCenter.defaultCenter().removeObserver(self) 
} 

Answer 1

尝试此代码并为您的情况设置“moveValue”。 记得延长UITextFieldDelegate

func textFieldDidBeginEditing(textField: UITextField) 
{ 
    self.animateViewMoving(true, moveValue: 85) 
} 
func textFieldDidEndEditing(textField: UITextField) 
{ 
    self.animateViewMoving(false, moveValue: 85) 
} 
func animateViewMoving (up:Bool, moveValue :CGFloat) 
{ 
    let durataMovimento:NSTimeInterval = 0.3 
    let movimento:CGFloat = (up ? -moveValue : moveValue) 
    UIView.beginAnimations("animateView", context: nil) 
    UIView.setAnimationBeginsFromCurrentState(true) 
    UIView.setAnimationDuration(durataMovimento) 
    self.view.frame = CGRectOffset(self.view.frame, 0, movimento) 
    UIView.commitAnimations() 
}