ChenYilong / ChenYilong/iOSInterviewQuestions

第30题,使用dispatch source替换NSTimer

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Description

可以不使用nstimer或者cadisplaylink这些需要加入runloop的定时器,使用GCD dispatch source timer替换。而且这个NSRunLoopCommonModes 是合集,也不用先加入default吧,只加入NSRunLoopCommonModes就行。

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