UITextView content height is incorrect in iOS 9

Question

I am dynamically adding views to scrollview with layout constraint. For the text view component, I wanted to set a height limit according to the text set in text form, so I created a class that extends UITextView. Inside the text view class, I wrote the following code to add a height limit.

#import "CETextView.h"

@implementation CETextView

- (void)layoutSubviews
{
    [super layoutSubviews];

    if (!self.heightConstraint)
    {
        self.heightConstraint =  [NSLayoutConstraint constraintWithItem:self attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:100];
        [self addConstraint:self.heightConstraint];
    }
    CGRect lRect = [self contentSizeRect];

    CGSize descriptionSize = lRect.size;
    self.heightConstraint.constant = descriptionSize.height;

}

- (CGRect)contentSizeRect
{
    NSTextContainer* textContainer = [self textContainer];
    NSLayoutManager* layoutManager = [self layoutManager];
    [layoutManager ensureLayoutForTextContainer: textContainer];
    CGRect lRect = CGRectMake(0, 0,320, 500);
    lRect.size = self.contentSize;
    lRect.size.height = lRect.size.height + 5;
    return lRect;
}


@end

This code gives the correct height in iOS 8.0, but gives the wrong height in iOS 9.0. I checked the apple doc for the new version of iOS 9.0, there are some changes related to the automatic layout.

Any help is appreciated.

Answer 1

, , , , YES UITextViews, . , , .

iOS 8 , NO, , , iOS 9 , . , .

Answer 2

contentSize , runloop. "sizeThatFits"