typeof(self)获取self的类型；
typeof(self)weakSelf 定义一个self类型的变量;
typeof(self)weakSelf = self 将self赋值给typeof(self)weakSelf的变量；
__weak typeof(self)weakSelf = self 将该变量置为弱引用类型。
UIButton * btn1 = [UIButton buttonWithType:UIButtonTypeCustom];
UIButton * btn2 = [UIButton buttonWithType:UIButtonTypeCustom];
__weak typeof(btn1) btn3 = btn2;
类似定义一个btn3并用btn2初始化它
#define WS(weakSelf) __weak __typeof(&*self)weakSelf = se...
#define WS(weakSelf) __weak __typeof(&*self)weakSelf = se...
#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...
本文标题：__weak typeof(self)weakSelf = se
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