How do I resize a UIButton to fit the text without it going wider than the screen?

Question

I have a UIButton that I want to resize to fit whatever text is inside it. It has a set width of 280, but the text should wrap to the next line(s) and extend the height of

Answer 1

I've been facing a similar problem, had limited width for my buttons and wanted them to grow vertically, depending on the amount of text I'd give them. I ended up with a simple solution, based on what I've learnt in the Apple docs (https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/AutolayoutPG/ImplementingView/ImplementingView.html)

I've subclassed UIButton and overridden two functions:

- (void)setBounds:(CGRect)bounds {
    if (!CGRectEqualToRect(bounds, self.bounds)) {
        [self invalidateIntrinsicContentSize];
    }
    [super setBounds:bounds];
}

- (CGSize)intrinsicContentSize {
    //
    CGSize size;

    self.titleLabel.frame = CGRectMake(self.titleLabel.frame.origin.x,
            self.titleLabel.frame.origin.y,
            self.frame.size.width - self.contentEdgeInsets.left - self.contentEdgeInsets.right - self.titleEdgeInsets.left - self.titleEdgeInsets.right,
            0);
    size = [self.titleLabel sizeThatFits:self.titleLabel.frame.size];
    size = CGSizeMake(size.width, size.height + 20);

    return size;
}

What basically happens here is that the button invalidates its intrinsic size (only when the bounds set are actually new -- this is to prevent an endless loop), and when the system asks for the intrinsic content size, I recalculate that based on the width of the button. The extra 20px height is for padding. I've tried many other ways but since my layout is all based on AutoLayout, I wanted something that I don't have to update whenever the device rotates or so. This simply works.

Good luck! Z.