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jasonhotsauce avatar jasonhotsauce commented on August 15, 2024 1

因为for循环中所需要执行的任务都dispatch到后台执行了,所以每次循环都是立刻返回。
这里还可以用dispatch_apply来代替,更加明了一些。@ChenYilong

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PhilCai1993 avatar PhilCai1993 commented on August 15, 2024

@jasonhotsaucedispatch_async这个操作不会很耗时咯?

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jasonhotsauce avatar jasonhotsauce commented on August 15, 2024

做 dispatch_async这个操作不会很耗时咯?

这个要相对的来看,一般来说是不太影响performance的,但是如果滥用的话,也会有问题。

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