Keyboard management blocking UITextView - ios

Question

So I followed apple guidelines on moving text above the keyboard, this works fine when the textfields are on scrollview, however the scrollview contains a collection view and that collection view loads a nib with textfields populated within it, they are all assigned as the delegate and when they are pressed the didEdit/endEdit functions of the delegate do fire however the keyboard management code doesn't work as expected... here is the keyboard management code
http://creativecoefficient.net/swift/keyboard-management/
heres a link to the code am using..
func keyboardWillBeShown(sender: NSNotification) {
print("KEYBOARD SHOWN")
let info: NSDictionary = sender.userInfo!
let value: NSValue = info.valueForKey(UIKeyboardFrameBeginUserInfoKey) as! NSValue
let keyboardSize: CGSize = value.CGRectValue().size
let contentInsets: UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0,keyboardSize.height, 0.0)
print(keyboardSize.height)
ScrollView.contentInset = contentInsets
ScrollView.scrollIndicatorInsets = contentInsets
// If active text field is hidden by keyboard, scroll it so it's visible
// Your app might not need or want this behavior.
var aRect: CGRect = self.view.frame
aRect.size.height -= keyboardSize.height
let activeTextFieldOrigin: CGPoint? = activeTextFieldRect?.origin
if (!CGRectContainsPoint(aRect, activeTextFieldOrigin!)) {
let dHeight = displayView.frame.height
ScrollView.scrollRectToVisible(activeTextFieldRect!, animated:true)
}
The problem with this code is that the activeTextfield works well with the textfields of the view, i get these points printed when i click on the textfield
activetextfield Frame
(0.0, 20.5, 150.0, 20.5)
but when i click on the collection view nib textfields i get these points
0.0, 0.0, 259.5, 30.0
I believe this is the reason the keyboard is blocking the textfields, the activetextfieldRect is giving the wrong coordinates to
ScrollView.scrollRectToVisible(activeTextFieldRect!, animated:true)
can someone give me some direction on how to go about fixing this?

Answer 1

Yes, you're right. scrollRectToVisible receive wrong coordinates, and this is why it is not work.
To achieve your goal consider using scrollToItemAtIndexPath(_:atScrollPosition:animated:). All what you need is IndexPath of cell to move. And I guess you can put that info in tag property of your textField (for instance).
Something like this:
// inside cellForItem..
cell.textField.tag = indexPath.item
// inside keyboardWillShown
let indexPath = NSIndexPath(forItem: activeTextField.tag inSection: 0) // assume that you have one section
collectionView.scrollToItemAtIndexPath(indexPath, atScrollPosition: .Top, animated: true) // or try .Center position

Answer 2

func keyboardWillBeShown(sender: NSNotification) {
print("KEYBOARD SHOWN")
let info: NSDictionary = sender.userInfo!
let value: NSValue = info.valueForKey(UIKeyboardFrameBeginUserInfoKey) as! NSValue
let keyboardSize: CGSize = value.CGRectValue().size
let contentInsets: UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, keyboardSize.height, 0.0)
ScrollView.contentInset = contentInsets
ScrollView.scrollIndicatorInsets = contentInsets
// If active text field is hidden by keyboard, scroll it so it's visible
// Your app might not need or want this behavior.
var aRect: CGRect = self.ScrollView.frame
aRect.size.height -= keyboardSize.height
let activeTextFieldRect: CGRect? = activeTextField?.frame
let activeTextFieldOrigin: CGPoint? = TextfieldPoint
if (!CGRectContainsPoint(aRect, activeTextFieldOrigin!)) {
ScrollView.scrollRectToVisible(testBox, animated:true)
}
}
// Called when the UIKeyboardWillHideNotification is sent
func keyboardWillBeHidden(sender: NSNotification) {
print("KEYBOARD HIDDEN")
let contentInsets: UIEdgeInsets = UIEdgeInsetsZero
ScrollView.contentInset = contentInsets
ScrollView.scrollIndicatorInsets = contentInsets
}
func textFieldDidBeginEditing(textField: UITextField) {
let point: CGPoint = textField.convertPoint(CGPointZero, toView: self.ScrollView);
TextfieldPoint = point
testBox = CGRectMake(point.x, point.y, textField.frame.width, 100 );
//let indexPath:NSIndexPath? = collview1.indexPathForItemAtPoint(point)
print("TEXTFIELD EDIT")
activeTextField = textField
print(activeTextField)
ScrollView.scrollEnabled = true
}
func textFieldDidEndEditing(textField: UITextField) {
print("TEXTFIELD STOP EDIT")
activeTextField = nil
ScrollView.scrollEnabled = false
}
it works just really messy i guess, i got the point where textfield was, made CGRect out of it, if the keyboard overlaps the text, the view adjusts, tested on iPhone 4s to 6s plus, works fine