没有互联网连接时调用'performFetchWithCompletionHandler'吗？ [英] Is 'performFetchWithCompletionHandler' called when no internet connection?

问题描述

如果设备未连接到互联网， UIApplicationDelegate 是否会调用 performFetchWithCompletionHandler ？在这种情况下，文档不清楚。

Will the UIApplicationDelegate call performFetchWithCompletionHandler if device is not connected to the internet ? The documentation isn't clear in this case.

推荐答案

经过一些测试，我可以声称 performFetchWithCompletionHandler 如果设备未连接到互联网，则不会调用委托方法。
在iOS8和iOS9上测试。

After some tests I can claim that performFetchWithCompletionHandler delegate method is not called if device is not connected to the internet. Tested on iOS8 and iOS9.

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