gistfile1.m

float backStrokeRotationAngleValue = [[notificationDictionary valueForKey:@"backStrokeRotationAngleValue"]floatValue];
        float forwardStrokeRotationAngleValue = [[notificationDictionary valueForKey:@"forwardStrokeRotationAngleValue"]floatValue];
        
        if (backStrokeRotationValue < 0) {
            backStrokeRotationAngleValue = backStrokeRotationAngleValue * -1;
            backStrokeRotationOpeningString = @"closing";
        }
        else if (backStrokeRotationAngleValue == 0) {
            backStrokeRotationOpeningString = @"";
        }
        else{
            backStrokeRotationOpeningString = @"opening";
        }
        
        if (forwardStrokeRotationAngleValue < 0) {
            forwardStrokeRotationAngleValue = forwardStrokeRotationAngleValue * -1;
            forwardStrokeRotationOpeningString = @"closing";
        }
        else if (forwardStrokeRotationAngleValue == 0) {
            forwardStrokeRotationOpeningString = @"";
        }
        else{
            forwardStrokeRotationOpeningString = @"opening";
        }
        
        backStrokeRotationValueString = [NSString stringWithFormat:@"%.0f", fabsf(backStrokeRotationAngleValue)];
        forwardStrokeRotationValueString = [NSString stringWithFormat:@"%.0f", fabsf(forwardStrokeRotationAngleValue)];