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RSS订阅转载 iOS strong 和weak的形象理解（真的很精典！）
The difference is that an object will be deallocated as soon as there are no strong pointers to it. Even if weak pointers point to it, once the last strong pointer is gone, the object will be dealloca
2015-06-01 11:09:49
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iOS 服务端java接收到数据为空
2015-05-30
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