I'm trying to resize a text view according to content & also it's sibling and parent container.
Below code is working fine in iOS 6
if (/* less than ios 7 */) {
CGRect frame = _textView.frame;
CGSize conSize = _textView.contentSize;
CGFloat difference = conSize.height - frame.size.height;
frame.size.height += difference;
_textView.frame = frame;
UIScrollView *parentView = (UIScrollView *)_textView.superview;
// adjust views residing below this text view.
// sibling view
UIView *belowView = // access it somehow
CGRect frame1 = belowView.frame;
frame1.origin.y += difference;
belowView.frame = frame1;
// adjust parent scroll view, increase height.
CGSize frame3 = parentView.contentSize;
frame3.height += difference;
parentView.contentSize = frame3;
} else {
// tried
[_textView sizeToFit];
[_textView layoutIfNeeded];
[parentView sizeToFit];
[parentView layoutIfNeeded];
}
Tried to follow iOS 7 solution from: How do I size a UITextView to its content on iOS 7?
but not working.
Any pointers?
Working code solution from @NSBouzouki
if (/* ios 7 */) {
[_textView.layoutManager ensureLayoutForTextContainer:_textView.textContainer];
[_textView layoutIfNeeded];
}
CGRect frame = _textView.frame;
CGSize conSize = _textView.contentSize;
CGFloat difference = conSize.height - frame.size.height;
frame.size.height += difference;
_textView.frame = frame;
UIScrollView *parentView = (UIScrollView *)_textView.superview;
// adjust views residing below this text view.
// sibling view
UIView *belowView = // access it somehow
CGRect frame1 = belowView.frame;
frame1.origin.y += difference;
belowView.frame = frame1;
// adjust parent scroll view, increase height.
CGSize frame3 = parentView.contentSize;
frame3.height += difference;
parentView.contentSize = frame3;
It seems UITextView's
contentSize
property is not correctly set in iOS 7 till viewDidAppear:
. This is probably because NSLayoutManager
lays out the text lazily and the entire text must be laid out for contentSize
to be correct. The ensureLayoutForTextContainer:
method forces layout of the provided text container after which usedRectForTextContainer:
can be used for getting the bounds. In order to get total width and height correctly, textContainerInset
property must be taken into account. The following method worked for me.
- (CGRect)contentSizeRectForTextView:(UITextView *)textView
{
[textView.layoutManager ensureLayoutForTextContainer:textView.textContainer];
CGRect textBounds = [textView.layoutManager usedRectForTextContainer:textView.textContainer];
CGFloat width = (CGFloat)ceil(textBounds.size.width + textView.textContainerInset.left + textView.textContainerInset.right);
CGFloat height = (CGFloat)ceil(textBounds.size.height + textView.textContainerInset.top + textView.textContainerInset.bottom);
return CGRectMake(0, 0, width, height);
}
Additionally, it seems UITextView's
setContentSize:
method is called from layoutSubviews
. So, calling layoutIfNeeded
on a textView
(which itself calls layoutSubviews
) after calling ensureLayoutForTextContainer:
on its layoutManager
, should make the textView's
contentSize
correct.
[someTextView.layoutManager ensureLayoutForTextContainer:someTextView.textContainer];
[someTextView layoutIfNeeded];
// someTextView.contentSize should now have correct value