Swift make the keyboard adapt with the devices screen - swift

Question

So I want to learn swift and I am making this simple chat application ... and I have some problems controlling the keyboard.
when the keyboard appears I want to push up the frame. If I wont do that I won't have access to my textfield. I found this two functions that are able to do that ... the problem is the devices screen aren't the same, and if i run the app on another device I have to change the size ...
For example if I use iPhon6 i will use a 220 and if I use a 5 it is necessary 150 ... if I remember right. The dimension doesn't matter, the thing it is that aren't the same...
I think it must be a way to easily control this future ... I'll appreciate any kind of help...
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: nil);
}
//hide keyboard and get down the view
func keyboardWillHide(sender: NSNotification) {
self.view.frame.origin.y += 200
}
//show keyboard and get up the view
func keyboardWillShow(sender: NSNotification) {
self.view.frame.origin.y -= 200
}
//hide keyboard if you tap the screen
override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
self.view.endEditing(true)
}
Thank you !

Answer 1

Add a ScrollView Try Below Code.
#IBOutlet weak var scrollView: UIScrollView!
#IBOutlet weak var onTopScrollView: UIView!
var activeTextField: UITextField!
var keyboardHeight: CGFloat = 0
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: nil);
}
//hide keyboard and get down the view
func keyboardWillHide(sender: NSNotification) {
keyboardHeight = 0
self.activeTextField = nil
let contentInsets = UIEdgeInsetsZero
scrollView.contentInset = contentInsets
scrollView.scrollIndicatorInsets = contentInsets
scrollView.contentOffset = CGPointMake(0, 0)
}
//show keyboard and get up the view
func keyboardWillShow(sender: NSNotification) {
let info : NSDictionary = sender.userInfo!
let kbSize = (info.objectForKey(UIKeyboardFrameBeginUserInfoKey)?.CGRectValue() as CGRect!).size
let contentInsets: UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0);
keyboardHeight = kbSize.height
println(keyboardHeight)
scrollView.contentInset = contentInsets;
scrollView.scrollIndicatorInsets = contentInsets;
var aRect = self.onTopScrollView.frame
aRect.size.height -= keyboardHeight;
if (!CGRectContainsPoint(aRect, self.activeTextField.frame.origin) ) {
var rect = onTopScrollView.convertRect(CGRectZero, fromView: self.activeTextField)
rect.size = self.activeTextField.frame.size
//print(CGRectContainsPoint(aRect, self.activeTextField.frame.origin))
self.scrollView.scrollRectToVisible(rect, animated: true)
}
}
override func viewWillDisappear(animated: Bool) {
NSNotificationCenter.defaultCenter().removeObserver(self)
super.viewWillDisappear(animated)
}
// handle TextField Delegates
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
func textFieldDidBeginEditing(textField: UITextField) {
self.activeTextField = textField
}