backgroundTimeRemaining 返回(35791394 分钟)?

问题描述

我在我的应用程序中使用 beginBackgroundTaskWithExpirationHandler.我理解后台应用程序完成工作的最长时间是 10 分钟，但是当我打印 backgroundTimeRemaining 的值时得到的是(35791394 分钟)

I'm using beginBackgroundTaskWithExpirationHandler in my application. my understanding the max time given for background application to finish work is 10 minutes, but what i got when I printed the value of backgroundTimeRemaining is (35791394 mins)

NSTimeInterval timeLeft = [UIApplication sharedApplication].backgroundTimeRemaining;
    NSLog(@"Background time remaining2222: %.0f seconds (%d mins)", timeLeft, (int)timeLeft / 60);

这是正常的，还是我做错了什么?！

is this normal, or it seems I did something wrong?!

推荐答案

试试这个:

 NSLog(@"Background time remaining: %f seconds (%d mins)", timeLeft, (int)(timeLeft / 60));

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