when I debug an iphone application, xcode launch 4 threads, such as thread 1,thread 2 ,thread 3 and thread 4.is anyone knows the usage of these threads?
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A:
It just depends on what the system is doing. Often there is a background network processing thread, and there can be background UI threads.
You can usually get an idea by stopping the debugger at a break point and switching threads to see what the call stacks look like.
Kendall Helmstetter Gelner
2010-07-30 04:45:06