将此段代碼放到自定義的UITabBarController腳本中即可
//----------------------------------------------------
// 當點選tabBar的時候,自動執行該代理方法(不需要手動設定代理)
override func tabBar(_ tabBar: UITabBar, didSelect item: UITabBarItem) {
// 使用枚舉周遊,判斷選中的tabBarItem等于數組中的第幾個
for (k,v) in (tabBar.items?.enumerated())! {
if v == item {
// 列印選中的iteme下标
print(k)
// 将下标傳入動畫方法
animationWithIndex(index: k)
}
}
}
//----------------------------------------------------
// 動畫方法
func animationWithIndex(index:Int){
// 不知為何,無法設定數組類型為UITabBarButton??????是以設定成了Any
var tabbarbuttonArray:[Any] = [Any]()
for tabBarBtn in self.tabBar.subviews {
if tabBarBtn.isKind(of: NSClassFromString("UITabBarButton")!) {
tabbarbuttonArray.append(tabBarBtn)
}
}
//----------------------------------------------------
let pulse = CABasicAnimation(keyPath: "transform.scale")
pulse.timingFunction = CAMediaTimingFunction(name:kCAMediaTimingFunctionEaseInEaseOut)
pulse.duration = 0.08
pulse.repeatCount = 1
pulse.autoreverses = true
pulse.fromValue = 0.7
pulse.toValue = 1.3
// 給tabBarButton添加動畫效果
let tabBarLayer = (tabbarbuttonArray[index] as AnyObject).layer
tabBarLayer?.add(pulse, forKey: nil)
}
//----------------------------------------------------