Question

我正在运行一个Web服务来刷新我的应用程序，但我希望在1小时后刷新我并且我使用代码来运行线程

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
// post an NSNotification that loading has started
for (x = 0; x++ ; x < numberOfRequests) {
    // create the NSURLRequest for this loop iteration
    NSURLResponse *response = nil;
    NSError *error = nil;
    NSData *data = [NSURLConnection sendSynchronousRequest:request
                                         returningResponse:&response
                                                     error:&error];
    // do something with the data, response, error, etc
}
// post an NSNotification that loading is finished
});

有人可以建议吗？

Answer 1

首先创建一个计时器，如下所示：

NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:3600.0 target:self selector:@selector(callWebService) userInfo:nil repeats:YES];

注意： 3600.0代表相当于1小时的秒数。

然后，您可以使用callWebService这样的方法将您的代码包装起来，这就是我使用过的方法：

- (void)callWebService
{
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        // post an NSNotification that loading has started
        for (x = 0; x++ ; x < numberOfRequests) {
            // create the NSURLRequest for this loop iteration
            NSURLResponse *response = nil;
            NSError *error = nil;
            NSData *data = [NSURLConnection sendSynchronousRequest:request
                                     returningResponse:&response
                                                 error:&error];
            // do something with the data, response, error, etc
        }
    // post an NSNotification that loading is finished
    });
}

希望这有帮助！：）

Answer 2

你可以这样做： -
[NSTimer scheduledTimerWithTimeInterval:3600.0 target:self selector:@selector(triggerTimer) userInfo:nil repeats:YES];

用这种方法致电您的网络服务： -

- (void)triggerTimer
{
    // Call your web service from here.
    // Refresh here.
}

在特定持续时间后在线程上运行应用程序

2 个答案: