Question from newbie about atheartrate HOT 5 CLOSED

Did you get prompted for permission to use the camera? If permission is not given when the dialog is displayed, then the camera can't be used by the app. You can check the permissions under the settings app.

from atheartrate.

Thanks for your quick answer.
Did check in the settings but the camera's permission was given.
I'll try to start again from scratch with also an other device.

from atheartrate.

So tested on a fresh xcode installation, on a new git clone (+add previous code for viewController), on a new device with ios 9.2.
When I run:

• (IBAction)Start:(id)sender {
  HeartRateDetectionModel *hr = [[HeartRateDetectionModel alloc]init];
  hr.delegate = self;
  [hr startDetection];
  }
  the flash starts, It ask me the authorisation to use for the camera: press OK,
  I get the delegate method firing:
  -(void)heartRateStart {
  NSLog(@"started!");
  self.label.text = @"started!";
  }
  The flash stop,
  Nothing else.

Settings privacy, camera enable for the project.
rerun the app, same flash for less a sec, label=started and nothing change.

tried with a device 7.1 (no cam permission), same result .

I'm pretty sure the problem comes from my side, but cannot find where.
Any other idea?

Thank you in advance.

from atheartrate.

I think I see your issue. HeartRateDetectionModel *hr is being released from memory right after you call start. You will need to keep an instance that stays around - probably as a property on the class your start method is in. Try something like this:

// At top of class file
@Propert (nonatomic, strong) HeartRateDetectionModel *hr;
...
...
...

• (IBAction)Start:(id)sender {
  self.hr = [[HeartRateDetectionModel alloc]init];
  self.hr.delegate = self; [hr startDetection];
  }

from atheartrate.

It was exactly that.
Tested my heart rate with your app and the results are good.
Thank you for your help.

from atheartrate.