UIStackView 中的 UITextview

Question

I added my UITextView inside UIStackView.

But my textview is not Multiline.

Auto layout is shown as below:

As per Image it is just taken 1 line. The textview frame shown as out of frame as per image.

UITextView

UIStackView

Answer 1

只要您的堆栈视图受到良好约束，如果您在UITextView上将isScrollEnabled设置为false ，它就可以在堆栈视图中调整自己的大小。

Answer 2

The problem is that you have fixed the height of UIStackview by giving top and bottom constraints.

1. delete the bottom constraint

   

Disable textview scrolling.

Make your textview delegate to self and implement textViewDidChange

Swift

func textViewDidChange(_ textView: UITextView) {
    view.layoutIfNeeded()
}

Objective C:

-(void)textViewDidChange:(UITextView *)textView {
    [self.view layoutIfNeeded];
}

Make sure this method get called.

Now your stackview should grow with your textview to multiline.

Then reason that your textview is not multiline is because you have fixed the height. So It will never be multiline.

See the GIF:

Answer 3

Best solution I have found for this so far is to wrap the UITextView in a UIView and then setting the fixed height of the UITextView with a height anchor.

let textView = UITextView()
let containerView = UIView()
textView.translatesAutoresizingMaskIntoConstraints = false
containerView.addSubview(textView)

textView.leadingAnchor.constraint(equalTo: containerView.leadingAnchor).isActive = true
textView.topAnchor.constraint(equalTo: containerView.topAnchor).isActive = true
textView.trailingAnchor.constraint(equalTo: containerView.trailingAnchor).isActive = true
textView.bottomAnchor.constraint(equalTo: containerView.bottomAnchor).isActive = true

textView.heightAnchor.constraint(equalToConstant: 100).isActive = true
let stackView = UIStackView(arrangedSubviews: [containerView])