UIView.beginAnimations("MyAnimation", context: nil) //开始动画 设置动画ID
UIView.setAnimationCurve(.EaseIn) //运动曲线 先慢后快
UIView.setAnimationDuration(2.0) //动画时间
iconImage.frame = frame //动画内容
UIView.setAnimationDelegate(self) // 设置动画代理
UIView.setAnimationDidStopSelector(Selector("changeStation")) //动画结束时调用方法
UIView.commitAnimations() // 开始动画
//动画效果：第二启动页2.5s展示过后经0.2秒删除并恢复展示NavbarTitleView
UIView.animateWithDuration(2.5, animations: { () -> Void in
launchView.alpha = 1
}) { (finished) -> Void in
UIView.animateWithDuration(0.2, animations: { () -> Void in
launchView.alpha = 0
self.navigationItem.titleView?.hidden = false
self.navigationItem.setLeftBarButtonItem(leftButton, animated: false)
}, completion: { (finished) -> Void in
launchView.removeFromSuperview()
})
}
