//创建一个线程在子线程执行,aSelector代表了新创建的线程,arg是传入的参数
[Object performSelectorInBackground:@selector(doSomething:) withObject:nil];
//实现方法
- (void) doSomething:(id)sender
{
//需要自行管理内存的释放
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
//执行你的代码
//回主线程更新UI
[selfperformSelectorOnMainThread:@selector(mainWork) withObject:nilwaitUntilDone:NO];
[pool release];
}
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