How to use UIVisualEffectView with a custom subclass of UIView

Question

I looked at this: How to use UIVisualEffectView? but I don't really understand how to apply it to my situation, after even looking at the comments.

I have a class SpecialHUD which is a subclass of HUDView which is a subclass of UIView. HUDView has its layer.contents set to be a background image (certain rectangle with rounded edges), and text in a label added as a subview. I can't change HUDView. I only need to change SpecialHUD.

I want the background image to act as the thing that blurs whatever is behind it - I can't get rid of the background image.

How do I use the UIVisualEffectView with my SpecialHUD?

I tried adding this to an update method in my SpecialHUD:

    UIVisualEffect *blurEffect;
    blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];

    UIVisualEffectView *visualEffectView;
    visualEffectView = [[UIVisualEffectView alloc] initWithEffect:blurEffect];

    visualEffectView.frame = self.bounds;
    [self addSubview:visualEffectView];
    [[visualEffectView contentView] addSubview:self.label];

But it blurs everything in the rectangular container, and disregards the image — I'm not sure how to make everything work together.

You want the visual effect view to be a subview of the label. That's it. — rmaddy, Nov 16 '16 at 23:24
I don't think so. The label is a small rectangle within the HUD. If I only applied it to that then the rest of the HUD would still be unblurred, right? — user101, Nov 16 '16 at 23:26
I misunderstood your code. I was thinking `self` was a view controller. — rmaddy, Nov 16 '16 at 23:28
What does "disregards the image" mean? It's not blurring the image and it should be? — beyowulf, Nov 17 '16 at 00:21

How to use UIVisualEffectView with a custom subclass of UIView

0 Answers0