How to remove the blank text container on empty UITextView

Question

I've already set the properties textContainerInset and lineFragmentPadding to zero as seen on this code thanks to this removing the padding and margin via this SO answer.

// this is inside a UITextView Subclass
required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
    self.textContainerInset = .zero
    self.textContainer.lineFragmentPadding = 0
}

Here's how the UITextView renders when it has text

Here it is with multiple lines

Here's how it renders without text

Is it possible to make the height 0 if the UITextView's text is empty?

Edit:

There is no constraint being used on the UITextView and I'm not planning to set a height constraint as I want this UITextView to automatically resize depending on the text being set into it
This is a isScrollEnabled = false UITextView inside a UITableViewCell, which automatically resizes depending on the data fetched from the api server.

About:

Language: Swift 3.2

IDE: Xcode 9.2

@FaysalAhmed no there is no height constraint for the textview. — Zonily Jame, Jan 24 '18 at 07:31

score 3 · Accepted Answer · answered Jan 24 '18 at 08:11

Thanks to uhuru's answer I've formulated an answer to the code of mine that wouldn't need too much of an overhaul.

First I've setup a height constraint for the UITextView programatically.

// outside the scope
var contentTextViewConstraint: NSLayoutConstraint?

// inside awakeFromNib
self.contentTextViewConstraint = NSLayoutConstraint(
    item: self.lblContent,
    attribute: NSLayoutAttribute.height,
    relatedBy: NSLayoutRelation.equal,
    toItem: nil,
    attribute: NSLayoutAttribute.notAnAttribute,
    multiplier: 1,
    constant: 0)
self.contentTextViewConstraint?.isActive = false

Then activate/deactivate the constraint depending on the String

// inside the setup
let contentText: String = model.contentText
self.tvContent.text = contentText
self.contentTextViewConstraint?.isActive = contentText.isEmpty

score 1 · Answer 2 · answered Jan 24 '18 at 07:13

1

You can set two height constraints for the TVw. One with your desired height and the other one with 0 height and less priority.

Then on the TextView's delegate do something like:

func textViewDidChange(_ textView: UITextView) {
    constraint.isActive = textView.text.count != 0
}

answered Jan 24 '18 at 07:13

This looks promising, I'll try implementing something like this in a different format – Zonily Jame Jan 24 '18 at 07:35

score 0 · Answer 3 · edited Jan 24 '18 at 07:25

0

Try this code:

CGSize sizeThatFitsTextView = [TextView sizeThatFits:CGSizeMake(TextView.frame.size.width, MAXFLOAT)];
TextViewHeightConstraint.constant = sizeThatFitsTextView.height;

edited Jan 24 '18 at 07:25

iGatiTech

2,306
1
21
45

answered Jan 24 '18 at 06:49

Sach

69
2

score -1 · Answer 4 · answered Dec 06 '18 at 13:42

Another possible solution is to add a constraint in InterfaceBuilder for height == 0, set it as isActive == false and give it a custom identifier.

Activate/deactivate it when needed in the code using :

textView.constraints.first { $0.identifier == "theConstrainIdentifier" }?.isActive = false // or true

score -2 · Answer 5 · edited Aug 14 '18 at 15:17

-2

This may be UITextView's bug. Try to follow code:

- (CGSize)intrinsicContentSize {
    CGSize size = [super intrinsicContentSize];
    if ((size.width < FLT_EPSILON || size.height < FLT_EPSILON) && self.textStorage.string.length == 0) {
        return CGSizeZero;
    } else {
        return size;
    }
}

edited Aug 14 '18 at 15:17

Michael

3,093
7
39
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answered Aug 14 '18 at 12:56

Pengxiang Tao

1

How to remove the blank text container on empty UITextView

5 Answers5