在类中，进行编辑下面的代码：
NSLog(@"main thread begin...");
[self performSelectorInBackground:@selector(doSomething:) withObject:nil];
NSLog(@"main thread end.....");
- (void) doSomething:(id)sender
{
NSLog( @"one thread begin..." );
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
for (int i=0; i<self.StarName_Final.count; i++) {
[self SaveToDataBase:[StarName_Final objectAtIndex:i]];
}
NSLog( @"one thread end..." );
[pool release];
}
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