iOS - 主线程调度在应用中的小技巧
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| #pragma mark - 宏定义
#ifndef dispatch_queue_async_safe
#define dispatch_queue_async_safe(queue, block)\
if (dispatch_queue_get_label(DISPATCH_CURRENT_QUEUE_LABEL) == dispatch_queue_get_label(queue)) {\
block();\
} else {\
dispatch_async(queue, block);\
}
#endif
#ifndef dispatch_main_async_safe
#define dispatch_main_async_safe(block) dispatch_queue_async_safe(dispatch_get_main_queue(), block)
#endif
|
dispatch_queue_get_label：返回创建队列时为队列指定的标签。
END