我的UITabBar
(自定义)和动画上有一个按钮,当按下该按钮时,按钮不会执行两次。我在第一次尝试时使用了print的打印声明,但我不确定为什么它在第一次尝试时不会执行动画。这是我的代码:
func menuButtonAction(sender: UIButton) {
if sender.currentImage == #imageLiteral(resourceName: "play") {
UIView.animate(withDuration: 0.3, animations: {
sender.setImage(#imageLiteral(resourceName: "playbutton2"), for: .normal)
self.button2.frame = CGRect(x: self.tabBar.center.x, y: self.tabBar.center.y - 100, width: self.buttonimage.size.width, height: self.buttonimage.size.height)
self.view3.alpha = 0.6
})
} else {
sender.setImage(#imageLiteral(resourceName: "play"), for: .normal)
UIView.animate(withDuration: 0.3, animations: {
self.button2.center = self.button.center
self.view3.alpha = 0
})
}
print("Middle Button was just pressed!")
}
我在viewWillAppear
:
button.addTarget(self, action: #selector(self.menuButtonAction(sender:)), for: .touchUpInside)
答案 0 :(得分:1)
似乎你没有在xib中的按钮上设置图像,所以在视图中设置你的图像像
那样加载希望它能运作
button.setImage(#imageLiteral(resourceName: "play"), for: .normal)