fight
为啥用block copy.
从栈到拷贝到堆
循环引用,控制器引用block. block里面调用 self
self引用控件,控件引用block,block里面引用self
http://www.jianshu.com/p/b79bac09177e
控制器引用view,如果view strong引用代理属性,控制器又是view的代理,就不能被正常释放了,内存涨,闪退
autorelease
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