2

这是我用来在单个单元格中显示 3 个不同视图的 Swift 代码。

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()
                })
            })
        })

    }

此功能工作正常，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和优化这个动画.autoreverse

当我尝试这样做时，动画无法同步工作。我需要一个又一个视图动画1>视图1 alpha 0到1

2> 查看 2 alpha 0 到 1

3> 查看 3 alpha 0 到 1

然后重复这个循环。

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
}
4

0 回答 0