问题描述
当我执行 po [NSThread currentThread] 时，我得到了
When I do po [NSThread currentThread], I got
{name = (null), num = 4}
{name = (null), num = 4}
当我向左看时，我看到:
When I look to the left I see:
看起来是线程编号 6，而不是 4.此外，我们还需要调用哪些属性来获取该线程编号?
Looks like it's Thread number 6, not 4. Also what properties do we need to call to get that thread numbers anyway?
[NSThread currentThread].number?虽然不存在.
[NSThread currentThread].number? Doesn't exist though.
推荐答案
线程编号几乎毫无意义.
Thread numbers are meaningless, pretty much.
不过，线程实例是每个线程的单例.巧合的是，您可以使用 NSThread 的地址.更好的是，深入到 mach_* API 并从该 API 中获取线程 ID.
The thread instance, though, is a singleton per thread. You could use the NSThread's address, by coincidence. Better, still, would be to dip down to the mach_* API and grab the thread ID from that API.
[NSThread currentThread] 与您将获得的数字一样独特.如果线程终止，然后创建了一个新线程，您可能会看到出售的相同地址.mach API 将提供一些非常独特的东西.
[NSThread currentThread] is about as unique of a number as you'll get. If the thread terminates and then a new thread is created, you might see the same address vended. The mach APIs will vend something just about as unique, really.
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