摘要: 模拟异步block: - (NSString *)blockReturn { __block NSString *str = @"sst"; dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^ 阅读全文
posted @ 2021-05-25 11:20 玉米炖排骨 阅读(866) 评论(0) 推荐(0)