mirror of
https://github.com/NohamR/knowledge-kit.git
synced 2026-05-25 04:17:17 +00:00
21 lines
571 B
Markdown
21 lines
571 B
Markdown
# block 原理
|
||
|
||
1. 解决循环引用不应该使用 weakself，而是使用 strong-weak
|
||
```Objective-c
|
||
__weak typeof(self) Weakself = self;
|
||
self.block = ^ {
|
||
__strong typeof(Weakself) Strongself = Weakself;
|
||
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^ {
|
||
NSLog(@"%@", Strongself.name);
|
||
});
|
||
};
|
||
self.block();
|
||
```
|
||
|
||
|
||
|
||
|
||
|
||
字节对齐：k值：8的倍数。
|
||
|
||
字节对齐的原因： |