Multiline UIButton and autolayout

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I had the same problem where I wanted my button to grow along with its title. I had to sublcass the UIButton and its intrinsicContentSize so that it returns the intrinsic size of the label.

- (CGSize)intrinsicContentSize
{
    return self.titleLabel.intrinsicContentSize;
}

Since the UILabel is multiline, its intrinsicContentSize is unknown and you have to set its preferredMaxLayoutWidth See objc.io article about that 

- (void)layoutSubviews
{
    [super layoutSubviews];
    self.titleLabel.preferredMaxLayoutWidth = self.titleLabel.frame.size.width;
    [super layoutSubviews];
}

The rest of the layout should work. If you set your both button having equal heights, the other one will grow to. The complete button looks like this

@implementation TAButton

- (instancetype)initWithCoder:(NSCoder *)coder
{
    self = [super initWithCoder:coder];
    if (self) {
        self.titleLabel.numberOfLines = 0;
        self.titleLabel.lineBreakMode = NSLineBreakByWordWrapping;
    }
    return self;
}

- (CGSize)intrinsicContentSize
{
    return self.titleLabel.intrinsicContentSize;
}

- (void)layoutSubviews
{
    [super layoutSubviews];
    self.titleLabel.preferredMaxLayoutWidth = self.titleLabel.frame.size.width;
    [super layoutSubviews];
}

@end

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