Multiline UIButton + Auto Layout

gistfile1.m

- (CGSize)intrinsicContentSize {
    
    CGSize boundingSize = CGSizeMake(self.titleLabel.preferredMaxLayoutWidth - self.titleEdgeInsets.left - self.titleEdgeInsets.right, CGFLOAT_MAX);
    
    NSAttributedString *attributedTitle = [self attributedTitleForState:self.state];
    
    CGRect boundingRect;
    
    if(attributedTitle) {
        
        boundingRect = [attributedTitle boundingRectWithSize:boundingSize options:(NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading) context:NULL];
    }
    else {
        
        NSString *title = [self titleForState:self.state];
        
        boundingRect = [title boundingRectWithSize:boundingSize options:(NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading) attributes:@{NSFontAttributeName : self.titleLabel.font} context:NULL];
    }
    
    
    return CGSizeMake(boundingRect.size.width + self.titleEdgeInsets.left + self.titleEdgeInsets.right, boundingRect.size.height + self.titleEdgeInsets.top + self.titleEdgeInsets.bottom);
}

Here's a little code snippet for a UIButton subclass which allows you to use a multi line UIButton with Auto Layout. This also solves the issue UIButton can have with Auto Layout where it doesn't allot for the titleEdgeInsets.

Just make sure you are setting the preferredMaxLayoutWidth for your label so it will wrap correctly. Here's a great post describing how to do that.
http://devetc.org/code/2014/07/07/auto-layout-and-views-that-wrap.html

Unfortunately this only seems to be working in iOS 8 right now.

This do not work for me. In result I get this solution:

override func intrinsicContentSize() -> CGSize {
    let size = titleLabel?.intrinsicContentSize() ?? CGSizeZero
    return CGSizeMake(size.width + titleEdgeInsets.left + titleEdgeInsets.right, size.height + titleEdgeInsets.top + titleEdgeInsets.bottom)
}

@AlexandrGraschenkov solution is works

Works fine, however I found that we need to take contentEdgeInsets into account as well, since some people might have set both.

@AlexandrGraschenkov thanks!

This works for me.

class MultiLineButton: UIButton {

    // MARK: - Init

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)

        self.commonInit()
    }

    private func commonInit() {
        self.titleLabel?.numberOfLines = 0
        self.titleLabel?.lineBreakMode = .byWordWrapping
    }

    // MARK: - Overrides

    override var intrinsicContentSize: CGSize {
        titleLabel?.intrinsicContentSize ?? .zero
    }

    override func layoutSubviews() {
        super.layoutSubviews()
        titleLabel?.preferredMaxLayoutWidth = titleLabel?.frame.size.width ?? 0
        super.layoutSubviews()
    }

}