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HomeWeb Front-endH5 Tutorialios版的youtube如何做到没有下载更新可是图标和内容都自动变了?

我的的iPad上装的youtube,市场并没有提示更新,我也没自己下载更新,可是某天打开一看居然内容排版完全跟之前不一样了,图标也自己变了。然后我打开android手机上的youtube,发现两者的内容是一样的,不知道是不是安卓上的也自动更新了。
另外我记得好像在iPad上的bilibili也遇过这样的情况,之前播放按钮一直在中间,然后某天打开就变到右下角了。

APP Store不是不允许自动更新的吗?而且这些应用也不像游戏打开的时候有下载更新。
请问这是通过什么技术实现的?
是因为这些APP都是HTML5实现的吗?可是打开的时候没有任何卡顿,难道UI资源早就准备好了好几套?而且ICON是如何自动更新的?

回复内容:

我看你提到了很多概念,但很混乱,理解也有问题。

首先,单从iOS的app图标变了,就能断定此app一定更新了,只是他可能是静默状态下的更新。

其次,iOS app的更新只能是在App Store(这里讨论App Store这个途径的app),并且应用本身不能提示用户更新。

至于自动更新,这本身就是App Store提供的一个功能,苹果不允许的是app提供更新的提示或者提供非App Store来源的途径。自动更新你在设置里面看一下就知道了。

然后就是布局的更新,这个倒不一定非得要更新app才能做得到,也不一定非要通过HTML,这个就不细说了。

再然后就是HTML,用它也能做出和Native几乎没什么分别的界面,也能不卡顿。

最后我要强调一点,不更新app就把图标换了,这是绝对不可能的事情。 app store本来就有自动更新这个功能。
你看下设置里 自动下载的项目是不是打开了。
ios版的youtube如何做到没有下载更新可是图标和内容都自动变了? 更新了,你的Store没刷出来,我这里store就显示了
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