Moving textfield when keyboard appears is covering up top textfields in (Swift) - ios

Question

I was first having problems with textfields on the bottom of the screen because the keyboard would cover them. Now that I fixed that problem I have a new one. When I try to enter text in a textfield that is at the top of the screen, the screen rises and does not let me see what I'm typing.
I think what I would ideally like to do is change how much the keyboard pushes the screen up. Below is the code I used for the initial change.
I just started learning to develop two weeks ago so I'm still getting familiar with all the syntax and functions.
var kbHeight: CGFloat!
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewWillAppear(animated:Bool) {
super.viewWillAppear(animated)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
NSNotificationCenter.defaultCenter().removeObserver(self)
}
func keyboardWillShow(notification: NSNotification) {
if let userInfo = notification.userInfo {
if let keyboardSize = (userInfo[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
kbHeight = keyboardSize.height
self.animateTextField(true)
}
}
}
func keyboardWillHide(notification: NSNotification) {
self.animateTextField(false)
}
func animateTextField(up: Bool) {
var movement = (up ? -kbHeight : kbHeight)
UIView.animateWithDuration(0.3, animations: {
self.view.frame = CGRectOffset(self.view.frame, 0, movement)
})
}

Answer 1

It's a suggestion
Instead of setting View's frame. put the view inside a UIScrollView.
then inside your keyboardWillShow and keyboardWillHide methods adjust the scrollview frame accordingly.
and set the scrollview's content offset using the "scrollRectToVisible" inside the the textfield delegate method.
- (void) textFieldDidBeginEditing:(UITextField *)textField
{
CGRect rectText = textField.frame;
self.scrollVIew scrollRectToVisible:rectText animated:TRUE];
}