Question

这是我的Swift Code，我用它来显示单个单元格中的3个不同视图。

func animateBothObjects() {
         weak var weakSelf = self

        UIView.animate(withDuration: 1.0, delay: 2.0, options: [.curveEaseIn, .allowUserInteraction], animations: {() -> Void in
            self.infoView.alpha = 0.0
            self.offerImage.alpha = 1.0
            self.businessOwnerImage.alpha = 0.0
        }, completion: {(finished: Bool) -> Void in
            if !self.isAccountFeed && !finished {
                return
            }
            UIView.animate(withDuration: 1.0, delay: 2.0, options: [.curveEaseIn, .allowUserInteraction], animations: {() -> Void in
                self.infoView.alpha = 0.0
                self.offerImage.alpha = 0.0
                self.businessOwnerImage.alpha = 1.0
            }, completion: {(finished: Bool) -> Void in
                if !self.isAccountFeed && !finished {
                    return
                }
                UIView.animate(withDuration: 1.0, delay: 2.0, options: [.curveEaseIn, .allowUserInteraction], animations: {() -> Void in
                    self.infoView.alpha = 1.0
                    self.offerImage.alpha = 0.0
                    self.businessOwnerImage.alpha = 0.0
                }, completion: {(finished: Bool) -> Void in
                    if !self.isAccountFeed && !finished {
                        return
                    }
                    weakSelf!.animateBothObjects()
                })
            })
        })

    }

此功能正常，但每秒帧数和CPU使用率非常高。我想知道我们是否可以使用.repeat和.autoreverse

来优化此动画

当我尝试这样做时，动画无法同步。我需要为一个接一个的视图制作动画 1 GT;查看1 alpha 0到1

2 - ;查看2 alpha 0到1

3＆GT;查看3 alpha 0到1

并重复循环。

以下代码在CPU％和每秒帧数方面效果更好，但动画不同步。

self.infoView.alpha = 0.0
self.offerImage.alpha = 0.0
self.businessOwnerImage.alpha = 0.0


UIView.animate(withDuration: 2.0, delay: 0.0, options:  [.transitionCrossDissolve,.repeat,.autoreverse], animations: {
    self.infoView.alpha = 1.0
}) { (success) in
    //self.infoView.alpha = 0.0
    print("animation completed as per Xcode")
}





UIView.animate(withDuration: 2.0, delay: 2.0, options:  [.transitionCrossDissolve, .repeat,.autoreverse], animations: {
    self.offerImage.alpha = 1.0
}) { (success) in
    //self.offerImage.alpha = 0.0
}

UIView.animate(withDuration: 2.0, delay: 4.0, options:  [.transitionCrossDissolve, .repeat,.autoreverse], animations: {
    self.businessOwnerImage.alpha = 1.0
}) { (success) in
    //self.businessOwnerImage.alpha = 0.0
}

UIView链动画具有更好的帧速率和CPU周期

0 个答案: