AutoLayout issue Swift 3.0

问题

I have already Autolayout this screenshot using.I want when i click textView,textView will always just above Keyboard and also i am using custom NavigationBar.I already used IQKeyBoardManagerSwiftIt is working but my NavigationBar also moves up I want my NavigationBarto be stick at top if i click textView.Any Solutions to this. thanks in advance

回答1:

Swift 3.0 :- Drag your UITextView in a contentView(UIView), Create IBOutlet of bottom constraint of contentView i.e bottomConstraint. After use the below code as mentioned and custom NavigationBar will also stick at top only textView will be just above keyboard.

 override func viewDidLoad() {
    super.viewDidLoad()

    let center: NotificationCenter = NotificationCenter.default
    center.addObserver(self, selector: #selector(ViewController.keyboardWillShow(notification:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
    center.addObserver(self, selector: #selector(ViewController.keyboardWillHide(notification:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}

func keyboardWillShow(notification: NSNotification){

    let userInfo:NSDictionary = notification.userInfo! as NSDictionary
    let keyboardSizeNow:CGSize = (userInfo.object(forKey: UIKeyboardFrameEndUserInfoKey)! as AnyObject).cgRectValue.size
    UIView.animate(withDuration: 0.2, animations: { () -> Void in
        self.bottomConstraint.constant = keyboardSizeNow.height - 49
        self.view.layoutIfNeeded()
    })
}
func keyboardWillHide(notification: NSNotification){
    UIView.animate(withDuration: 0.2, animations: { () -> Void in
        self.bottomConstraint.constant = 0
        self.view.layoutIfNeeded()
    })
}

回答2:

you can implement keyboardWillShow and keyboardWillHide method in similar way

func keyboardWillShow(notification: NSNotification) {

        if let keyboardSize = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
            buttonBottomConstraint.constant = keyboardSize.height
            UIView.animate(withDuration: 0.3, animations: {
                self.view.layoutIfNeeded()
            })
        }
    }
    func keyboardWillHide(notification: NSNotification) {
        if let _ = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
            bottomConstraint.constant = 0
            UIView.animate(withDuration: 0.3, animations: {
                self.view.layoutIfNeeded()
            })
        }
    }

also, don't forget to observe in viewDidLoad.

来源：https://stackoverflow.com/questions/49670145/autolayout-issue-swift-3-0

标签

swift3

autolayout

uinavigationbar

iqkeyboardmanager