[ios] Move textfield when keyboard appears swift

Here is a generic solution for all TextField Steps -

1) Create a common ViewController that is extended by other ViewControllers

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)

}
 @objc func keyboardWillShow(notification: NSNotification) {
    if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
        if self.view.frame.origin.y == 0 {
            self.view.frame.origin.y -= getMoveableDistance(keyboarHeight: keyboardSize.height)
        }
    }
}

@objc func keyboardWillHide(notification: NSNotification) {
    if self.view.frame.origin.y != 0 {
        self.view.frame.origin.y = 0
    }
}
deinit {
    NotificationCenter.default.removeObserver(self)
}

//get the distance to move up the main view for the focus textfiled
func getMoveableDistance(keyboarHeight : CGFloat) ->  CGFloat{
    var y:CGFloat = 0.0
    if let activeTF = getSelectedTextField(){
        var tfMaxY = activeTF.frame.maxY
        var containerView = activeTF.superview!
        while containerView.frame.maxY != self.view.frame.maxY{
            let contViewFrm = containerView.convert(activeTF.frame, to: containerView.superview)
            tfMaxY = tfMaxY + contViewFrm.minY
            containerView = containerView.superview!
        }
        let keyboardMinY = self.view.frame.height - keyboarHeight
        if tfMaxY > keyboardMinY{
            y = (tfMaxY - keyboardMinY) + 10.0
        }
    }

    return y
}

2) Create a extension of UIViewController and the currently active TextField

//get active text field

extension UIViewController { func getSelectedTextField() -> UITextField? {

    let totalTextFields = getTextFieldsInView(view: self.view)

    for textField in totalTextFields{
        if textField.isFirstResponder{
            return textField
        }
    }

    return nil

}

func getTextFieldsInView(view: UIView) -> [UITextField] {

    var totalTextFields = [UITextField]()

    for subview in view.subviews as [UIView] {
        if let textField = subview as? UITextField {
            totalTextFields += [textField]
        } else {
            totalTextFields += getTextFieldsInView(view: subview)
        }
    }

    return totalTextFields
}

}

Examples related to ios

Adding a UISegmentedControl to UITableView Crop image to specified size and picture location Undefined Symbols error when integrating Apptentive iOS SDK via Cocoapods Keep placeholder text in UITextField on input in IOS Accessing AppDelegate from framework? Autoresize View When SubViews are Added Warp \ bend effect on a UIView? Speech input for visually impaired users without the need to tap the screen make UITableViewCell selectable only while editing Xcode 12, building for iOS Simulator, but linking in object file built for iOS, for architecture arm64

Examples related to swift

Make a VStack fill the width of the screen in SwiftUI Xcode 10.2.1 Command PhaseScriptExecution failed with a nonzero exit code Command CompileSwift failed with a nonzero exit code in Xcode 10 Convert Json string to Json object in Swift 4 iOS Swift - Get the Current Local Time and Date Timestamp Xcode 9 Swift Language Version (SWIFT_VERSION) How do I use Safe Area Layout programmatically? How can I use String substring in Swift 4? 'substring(to:)' is deprecated: Please use String slicing subscript with a 'partial range from' operator Safe Area of Xcode 9 The use of Swift 3 @objc inference in Swift 4 mode is deprecated?

Examples related to cocoa-touch

Include of non-modular header inside framework module Move textfield when keyboard appears swift Create space at the beginning of a UITextField Navigation bar with UIImage for title Generate a UUID on iOS from Swift How do I write a custom init for a UIView subclass in Swift? creating custom tableview cells in swift How would I create a UIAlertView in Swift? Get current NSDate in timestamp format How do you add an in-app purchase to an iOS application?

Examples related to keyboard

How do I check if a Key is pressed on C++ Move a view up only when the keyboard covers an input field Move textfield when keyboard appears swift Xcode iOS 8 Keyboard types not supported Xcode 6: Keyboard does not show up in simulator How to dismiss keyboard iOS programmatically when pressing return Detect key input in Python Getting Keyboard Input Press Keyboard keys using a batch file Keylistener in Javascript

Examples related to uitextfield

Keep placeholder text in UITextField on input in IOS Set the maximum character length of a UITextField in Swift How to restrict UITextField to take only numbers in Swift? Disabling user input for UITextfield in swift How do I check when a UITextField changes? Swift add icon/image in UITextField Move textfield when keyboard appears swift Create space at the beginning of a UITextField Max length UITextField How to hide keyboard in swift on pressing return key?