block对于其变量都会形成strong reference，
对于self也会形成strong reference ，
而如果self本身对block也是 strong reference 的话，
就会形成 strong reference 循环，造成内存泄露，
为了防止这种情况发生，
在block外部应该创建一个week（__block） reference。
所以在block内如果有self的话，
一般都会在block外面加一句_block typeof(self) bself = self;
__block typeof(self) bself = self;
[self methodThatTakesABlock:^ {
[bself doSomething];
}
#define WS(weakSelf) __weak __typeof(&*self)weakSelf = self;
typeof(self) __weak weakSelf = self; Cannot create __weak...
define WEAK_SELF __weak typeof(self)weakSelf = self; defi...
``` __weak typeof(self) weakSelf = self; self.bootomShopp...
(```)__weak typeof(self) weakSelf = self;self.block = ^{_...
#define WeakSelf(weakSelf) __weak __typeof(&*self)weakSel...
`` `` ``__weak typeof(self) weakSelf = self; `` ``__block...
1、__weak 与__strong 组合 __weak typeof(self) weakself = self...
项目中的宏定义 define kSelfWeak __weak typeof(self) weakSelf = s...
#define WS(weakSelf) __weak __typeof(&*self)weakSelf = se...
本文标题：__weak typeof(self) weakSelf = s
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