Subclass of UIButton animate sublayer with titleLabel - ios

Question

Im making a subclass of UIButton to have a custom sublayer on the buttons layer.
I make this button a System type in storyboard and just replace class from UIButton my subclass in storyboard under Identity inspector.
I use System type button instead of custom to get that fade animation on titleLabel.
Now, I want to fade the sublayer aswell when the titleLabel fades.
Ive tried the begin/continue/endTrackingWithTouch: methods but it doesnt change when the titleLabel changes.
class TAButton:UIButton {
let innerShadowLayer = CFInnerShadow() // Custom class of CAGradientLayer
override func beginTrackingWithTouch(touch: UITouch, withEvent event: UIEvent) -> Bool {
innerShadowLayer.opacity = 0.5
return super.beginTrackingWithTouch(touch, withEvent: event)
}
override func continueTrackingWithTouch(touch: UITouch, withEvent event: UIEvent) -> Bool {
let con = super.continueTrackingWithTouch(touch, withEvent: event)
println(con) // I expected this to change to false when titleLabel fades but I was wrong, its always true
return con
}
override func endTrackingWithTouch(touch: UITouch, withEvent event: UIEvent) {
innerShadowLayer.opacity = 1.0
super.endTrackingWithTouch(touch, withEvent: event)
}
func setup() {
self.setBackgroundGradient(UIColor(hex: 0x4A9BCB, alpha: 0.25), color2: UIColor(hex: 0xBAE5FF, alpha: 0.25)) // Custom function Im using
self.makeRoundSides() // Custom function Im using
innerShadowLayer.frame = self.bounds
innerShadowLayer.cornerRadius = self.layer.cornerRadius
innerShadowLayer.innerShadowRadius = 10
innerShadowLayer.innerShadowOpacity = 0.6
innerShadowLayer.innerShadowColor = UIColor(hex: 0x69FFF7, alpha: 1.0).CGColor
self.layer.addSublayer(innerShadowLayer)
}
override func layoutSubviews() {
super.layoutSubviews()
setup()
}
}

Answer 1

This seems to work for me if I override touchesBegan and touchesEnded instead.
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
super.touchesBegan(touches, withEvent: event)
innerShadowLayer.opacity = 0.5
}
override func touchesEnded(touches: NSSet, withEvent event: UIEvent) {
super.touchesEnded(touches, withEvent: event)
innerShadowLayer.opacity = 1.0
}