Prompting permission for Motion & Fitness data

Question

I want users to be prompted as soon as app launches for permission to access Motion & Fitness data (CoreMotion).

Right now I'm trying to do a "dummy" query for the data to prompt the permission on a application:didFinishLaunchingWithOptions

CMMotionActivityManager *motionActivityManager=[[CMMotionActivityManager alloc]init];
    [motionActivityManager startActivityUpdatesToQueue:[NSOperationQueue mainQueue] withHandler:^(CMMotionActivity *activity) {
        NSLog(@"Dummy query to prompt permission from user");

    }];

But what happens is the app launches and it hangs on the splash screen — if I press home button then the app tries closing and THEN the permission prompt pops in.

Any thought how to accomplish this?

what about moving it to willFinishLaunchingWithOptions: – Rob85 Oct 18 '15 at 21:50 — Rob85, Oct 18 '15 at 21:50

score 7 · Answer 1 · answered May 31 '17 at 06:21

I researched on motion manager and tried to create a library for motion detection. From that, i got to know permission for motion detection will pop up when the below code will execute.

CMMotionActivityManager *motionActivityManager = [[CMMotionActivityManager alloc]init];
    [motionActivityManager startActivityUpdatesToQueue:[NSOperationQueue mainQueue] withHandler:^(CMMotionActivity *activity) {
        NSLog(@"Motion...%@",activity);
    }];

Hope this will help you. Thank you.

This worked for me after I converted it to Swift. I just had it stop later in my flow but it prompts the request well! — agrippa, May 31 '18 at 00:48

score 1 · Answer 2 · answered Mar 13 '16 at 23:35

1

Had the same issue. The fix that worked for me is to start the motion manager in a place AFTER the first view is fully loaded and has called all of its delegates.

It appears that the method startActivityUpdatesToQueue blocks until it has word one way or another on the permission was accepted but the permission request will not show on the screen until the screen until the first view does. So if you put this method before that time it will simply block the app from finishing the launch and the launch screen will continue.

answered Mar 13 '16 at 23:35

ztj44

11
2

1

What method are you putting the call in? Still hanging in methods like `didAppear()` of the interface controll – Joe Maher May 02 '18 at 23:08
Not showing for me even if I put the startActivityUpdatesToQueue in the viewDidAppear() method – Andrea Gorrieri Nov 14 '19 at 13:10

Prompting permission for Motion & Fitness data

2 Answers2