Button position must change depending On Keyboard with swift

by iOS Example

ButtonOnKeyboard

"ButtonOnKeyboard" is used when the button position must change depending on the keyboard. Available in both basic and notch designs. It is also available for UIButton, as well as UIView.

Getting Started

In viewDidLoad(), stores the default size of the button.

button.bk_defaultButtonHeight = 50  // example size.

Whenever the keyboard state changes, it calls button.bk_onKeyboard().
If UITextField is not visible by UIButton, add the scrollView parameter to "bk_onKeyboard()".

button.bk_onKeyboard(keyboardHeight: height)
or
button.bk_onKeyboard(scrollView: scrollView, keyboardHeight: height)

Demo

Example

override func viewDidLoad() {
    super.viewDidLoad()
    
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(_:)), name: UIResponder.keyboardWillShowNotification, object: nil)
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(_:)), name: UIResponder.keyboardWillHideNotification, object: nil)
    
    button.bk_defaultButtonHeight = buttonHeightConstraint.constant  // Stores the default size of the button.
}

@objc func keyboardWillShow(_ notification: Notification) {
    var visibleHeight: CGFloat = 0
     
    if let userInfo = notification.userInfo {
        if let windowFrame = UIApplication.shared.keyWindow?.frame,
            let keyboardRect = (userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue {
            visibleHeight = windowFrame.intersection(keyboardRect).height
        }
    }
    
    updateButtonLayout(height: visibleHeight)
}
 
@objc func keyboardWillHide(_ notification: Notification) {
    updateButtonLayout(height: 0)
}

func updateButtonLayout(height: CGFloat) {
    button.bk_onKeyboard(scrollView: scrollView, keyboardHeight: height)
}

Requirements

  • Swift 5.0
  • iOS 11.0+

Example

To run the example project, clone the repo, and run pod install from the Example directory first.

Requirements

Installation

ButtonOnKeyboard is available through CocoaPods. To install
it, simply add the following line to your Podfile:

pod 'ButtonOnKeyboard'

Author

magicmon, sagun25si@gmail.com

GitHub