Rotating UIProgressView

TJLProgressView.m

- (void)showVerticallyOnLeftSideOfView:(UIView *)parent havingNavigationBar:(BOOL)havingNavBar {
    [parent addSubview:self];

    CGFloat widthOffset = havingNavBar ? 64 : 0;
    CGFloat x = CGRectGetWidth(parent.bounds) - (CGRectGetHeight(parent.bounds));
    self.frame = (CGRect){
            .origin.x = x,
            .origin.y = CGRectGetMaxY(parent.bounds),
            .size.width = CGRectGetHeight(parent.bounds) - widthOffset,
            .size.height = 0
    };
    self.layer.anchorPoint = CGPointMake(0.0f, 1.0f);

    self.transform = CGAffineTransformMakeRotation((CGFloat)tjl_degToRadians(-90));

}