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PerformSelector 的实现原理？ #114

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tbfungeek opened this issue Feb 14, 2020 · 0 comments
Open

PerformSelector 的实现原理？ #114

tbfungeek opened this issue Feb 14, 2020 · 0 comments

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@tbfungeek
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当调用 NSObject 的 performSelecter:afterDelay: 后，实际上其内部会创建一个 Timer 并添加到当前线程的 RunLoop 中。所以如果当前线程没有 RunLoop，则这个方法会失效。

当调用 performSelector:onThread: 时，实际上其会创建一个 Timer 加到对应的线程去，同样的，如果对应线程没有 RunLoop 该方法也会失效。
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@tbfungeek