ios - iOS 每 x 秒更新一次位置

Question

我正在尝试构建一个 iOS，我可以在其中每 x 秒更新一次我的位置并发送通知以更新 UI。 我得到了我的位置，但更新是随机的。任何想法如何添加间隔？

这是我的代码:

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    CLLocation *location = [locations lastObject];
    [self sendNotification :@"long"
                           :[NSString stringWithFormat:@"%.8f",location.coordinate.longitude]];
    [self sendNotification :@"lat"
                           :[NSString stringWithFormat:@"%.8f",location.coordinate.latitude]];

}

Answer 1

试试这个:

在.h文件中声明

@property (strong, nonatomic) NSDate *lastTimestamp;

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    CLLocation *mostRecentLocation = locations.lastObject;
    NSLog(@"Current location: %@ %@", @(mostRecentLocation.coordinate.latitude), @(mostRecentLocation.coordinate.longitude));

    NSDate *now = [NSDate date];
    NSTimeInterval interval = self.lastTimestamp ? [now timeIntervalSinceDate:self.lastTimestamp] : 0;

    if (!self.lastTimestamp || interval >= 5 * 60)
    {
        self.lastTimestamp = now;
        NSLog(@"update your UI");
    }
}