Question

我正在开发一个具有许多动态内容的企业。是否有办法每星期在3am更新内容(新故事、下载新录像等)。

这是可能的吗?

Answer 1

虽然无法在座标的运行时这样做,但是,在发射或运行时,你可以非常容易地这样做(如果在3阿马上运行)。这里我做的是:

Store an NSDate using NSUserDefaults for the last time you updated.
At launch, if a 3 AM period has passed since that date, initiate a sync.
Also at launch, start an NSTimer with a long interval—5 minutes or so. At each firing, check if a 3 AM period has passed and if it has, initiate a sync. You could even roll the last bullet’s code into this NSTimer’s firing method and just run it once at launch. Just be sure to update the NSDate object each time.
In the application delegate, in the methods called from returning from the background, check the time and sync if necessary—or just start the NSTimer and have it fire immediately first.

这应涵盖你们需要更新的假设情景。