UIButton with CAShapeLayer makes title disappear while scrolling

问题

I have a ProfileCollectionViewCellwith one method:

func configureCellWithProfile(profile: Profile) {

    shapeLayer.removeFromSuperlayer()

    let path = CGPathCreateMutable()

    CGPathMoveToPoint(path, nil, 0, 0)
    CGPathAddLineToPoint(path, nil, CGRectGetWidth(likeButton.frame), 0)
    CGPathAddLineToPoint(path, nil, CGRectGetWidth(likeButton.frame), CGRectGetHeight(likeButton.frame))
    CGPathCloseSubpath(path)

    shapeLayer.fillColor = profile.favourite ? UIColor.brilliantRose().CGColor : UIColor.blackSqueeze().CGColor
    shapeLayer.path = path

    likeButton.layer.masksToBounds = true
    likeButton.layer.addSublayer(shapeLayer)
}

And just after load it looks like this:

but after I scroll my title (heart from icomoon font) disappear:

Why?

回答1:

I solved the problem, replacing:

likeButton.layer.addSublayer(shapeLayer)

with

likeButton.layer.insertSublayer(shapeLayer, below: likeButton.titleLabel?.layer)

来源：https://stackoverflow.com/questions/38218283/uibutton-with-cashapelayer-makes-title-disappear-while-scrolling