iphone - Can i find out when app permissions change?

Question

I have an app which requires the use of location services, but attempts to fetch data every minute. This means that even if the user allows location services after a second, it'll be another 59 before it refreshes. Is it possible to know when app permissions changed?

Answer 1

好的好的，我会做一个答案大声笑。

不过，不要相信我的话，我鼓励您先尝试一下，看看它是否能满足您的需求。

-(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
{
    // -----------------------------------------
    // Available authorization status are:
    //
    // kCLAuthorizationStatusAuthorized
    // kCLAuthorizationStatusDenied
    // kCLAuthorizationStatusNotDetermined
    // kCLAuthorizationStatusRestricted
    // -----------------------------------------

    if(status == kCLAuthorizationStatus...)
    {
        // do something here
    }        
}

它是一个 CLLocationManager 委托，因此您需要创建一个 CLLocationManager 对象，然后将其委托设置为 self 并使您的视图控制器符合 CLLocationManagerDelegate 协议：

// .h file
@interface MyClass <...,CLLocationManagerDelegate,UITableViewDelegate,....>
{
    CLLocationManager *locationManager;
}

// in the .m file
-(void)viewDidLoad
{
    ...
    locationManager.delegate = self
}