Possible Duplicate:
When to use -retainCount?
我试图了解自动释放池。我创建了一个示例应用程序，如下所示：
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
NSString *releasePoolString = [[[NSString alloc] initWithFormat:@"%@",@"ReleasePool autorelease variable"] autorelease];
NSLog(@"Retain count of autorelease variable inside release pool %i",[releasePoolString retainCount]);
[pool drain];
// After pool drain still retain count = 1 ??????
NSLog(@"Retain count of autorelease variable after release pool drain %i",[releasePoolString retainCount]);
最后一条日志仍将保留计数打印为1。
我错过了什么吗？有人可以帮助我了解...吗？
谢谢...
最佳答案
keepCount永远不会达到0，因为当它为1并调用release时，它将立即调用dealloc而不递减keepCount