AVCaptureMetadataOutput setMetadataObjectTypes unsupported type found

Question

I know there are someone have ask this question.But it is a sorry i donot find the answer.

dispatchQueue = dispatch_queue_create(\"myQueue\", NULL);
[capture         


        

Answer 1

It is because of you close the camera authorization. You can open your camera authorization, then open canner to scan QRCode. The blow give typical examples：

AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo]; 
if(status == AVAuthorizationStatusAuthorized) {  
    // authorized  
    [self setupCamera];  
} else {  
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Tips" message:@"Authorization is required to use the camera, please check your permission settings: Settings> Privacy> Camera" delegate:nil cancelButtonTitle:nil otherButtonTitles:@"Ok", nil];
        [alert show];  
}