Objective C 到 Swift 调度过程

Question

我在将 Objective C 中的以下代码转换为 Swift 时遇到了一些麻烦：

- (BOOL)loadEventsAtDate:(NSDate*)date
{

    dispatch_async(self.bgQueue, ^{
        [self bg_loadOneDay];
    });

    return YES;
}

- (void)bg_loadOneDay
{
    __block NSDate *date;

    dispatch_sync(dispatch_get_main_queue(), ^{
       .....
    });

    if (date) {
        [self bg_loadEventsAtDate:date];
    }
}

- (void)bg_loadEventsAtDate:(NSDate*)date
{
    dispatch_async(dispatch_get_main_queue(), ^{
    ......
    });
}

你能帮帮我吗？我对此很陌生！！！提前谢谢你！！！

Answer 1

试试这个：

func loadEventsAtDate(date: NSDate) -> Bool {
    let bgQueue = dispatch_queue_create("MY_BG_QUEUE", DISPATCH_QUEUE_SERIAL)//use your `bgQueue`
    dispatch_async(bgQueue) {
        self.bg_loadOneDay()
    }
    return true
}

func bg_loadOneDay() {
    let date = NSDate()
    dispatch_async(dispatch_get_main_queue()) {
        //....
    }
    bg_loadEventsAtDate(date)//not sure which date you are sending here, please check
}

func bg_loadEventsAtDate(date: NSDate) {
    dispatch_async(dispatch_get_main_queue()) {
        //....
    }
}