I have a UITextView, with a height constraint in order to adapt the height of the frame to its content (depending of the length of the string). (I use autolayout). It works fine.
But, I don't understand something about the size of the textview frame.
I explain.
I display the frame infos after setting the text of the uitextview, and after updating the constraint.
override func viewDidLoad() {
...
self.textview.text = post.title
...
}
override func viewDidLayoutSubviews() {
let contentSize = self.textview.sizeThatFits(self.textview.bounds.size)
self.heightConstraint.constant = contentSize.height
self.textview.layoutIfNeeded()
print(self.textview.frame) // frame
print(self.textview.bounds) // bounds
}
The result:
For case A:
(8.0, 0.0, 584.0, 97.0) //frame
(0.0, 0.0, 584.0, 97.0) //bounds
For case B:
(8.0, 0.0, 584.0, 97.0) //frame
(0.0, 0.0, 584.0, 97.0) //bounds
I don't understand why the height of the frame is the same in both case???
This will solve the problem if you don't need the scrolling part of the UITextView
:
class ViewController: UIViewController {
let textView = UITextView()
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = UIColor.whiteColor()
self.view.addSubview(self.textView)
self.textView.backgroundColor = UIColor.redColor()
self.textView.text = "Hello world Hello world Hello world Hello world Hello world Hello world"
self.textView.translatesAutoresizingMaskIntoConstraints = false
self.textView.topAnchor.constraintEqualToAnchor(self.view.topAnchor).active = true
self.textView.leftAnchor.constraintEqualToAnchor(self.view.leftAnchor).active = true
self.textView.rightAnchor.constraintEqualToAnchor(self.view.rightAnchor).active = true
self.textView.scrollEnabled = false // magic which will help auto expanding
}
}
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