Detect permission of media library ios

Question

In my app, I want to detect that if user give the permission to his media library or not. User may denied media library permission when system popup ask or later from settin

Answer 1

-(void) checkMediaLibraryPermissions {
    [MPMediaLibrary requestAuthorization:^(MPMediaLibraryAuthorizationStatus status){
        switch (status) {
            case MPMediaLibraryAuthorizationStatusNotDetermined: {
                // not determined
                break;
            }
            case MPMediaLibraryAuthorizationStatusRestricted: {
                // restricted
                break;
            }
            case MPMediaLibraryAuthorizationStatusDenied: {
                // denied
                break;
            }
            case MPMediaLibraryAuthorizationStatusAuthorized: {
                // authorized
                break;
            }
            default: {
                break;
            }
        }
    }];
}