oenius / darwinnativedispatcher Goto Github PK

I found a bug in DarwinNativeDispatcher/DarwinNativeDispatcher/DarwinNativeDispatcher/UIViewController+DNDExtra.m line 31!
if there need a "return"?

run in simulator crash!

``` 是不是少一个

你好~

我看到代码中关于单例的初始化的代码
static DNNavigationControllerDispatcher *dispatcher;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
dispatcher = [[self.class alloc]init];
});
});
这里面两个dispatch_once嵌套在一起是什么意思呢？好像从来没有见过，求告知~