iOS UIButton设置两种状态切换之间的效果

//需要和下边的方法配合使用
button.setImage(UIImage(named: "collect_gray"), for: .normal)
button.setImage(UIImage(named: "collect_blue"), for: .selected)


@objc private func handleBtnAction(_ sender: UIButton) {
       sender.isSelected = !sender.isSelected
}