以形如
_fontValueChangedBlock = ^(){
[self.fontSmallButton addTarget:self action:@selector(btnFontSmallClicked) forControlEvents:UIControlEventTouchUpInside];
};
的代码为例，这个代码运行会报警告。"capturing self strongly in this block is likely to lead to a retain cycle”
要想消除这个警告，需要将代码改为如下形式：
__weak typeof(self) weakSelf = self; _fontValueChangedBlock = ^(){ typeof(weakSelf) __strong strongSelf = weakSelf; [strongSelf.fontSmallButton addTarget:strongSelf action:@selector(btnFontSmallClicked) forControlEvents:UIControlEventTouchUpInside]; };
参考 http://stackoverflow.com/questions/16067712/avoiding-the-capturing-self-strongly-in-this-block-is-likely-to-lead-to-a-retai
在block函数中规避错误信息 "capturing self strongly in this block is likely to lead to a retain cycle”
原文：http://www.cnblogs.com/guozai9527/p/4022137.html