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POInserting an OpenGL layer in front of a UIView with controls
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copied!<p>I'm trying to use OpenGLES animation layer in front of a UIView which contains controls. For example, I want to render animation in FRONT of the UIButton (so animated objects pass in front of (occluding) the button from view as they pass).</p> <p>Haven't been able to find an answer despite several related threads. </p> <p>My primary view controller has one view in it, of type GLKView. I have a separate xib (View.xib) which contains one UIView with one UIButton in it.</p> <p><strong>Within my viewDidLoad, I have:</strong></p> <pre><code>self.context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2]; if (!self.context) { NSLog(@"Failed to create ES context"); } GLKView *glView = (GLKView *)self.view; glView.context = self.context; glView.drawableDepthFormat = GLKViewDrawableColorFormatRGB565; glView.opaque = NO; glView.alpha = 1.0; glView.backgroundColor = [UIColor clearColor]; UIView *controlView = [[[NSBundle mainBundle]loadNibNamed:@"View" owner:self options:nil] objectAtIndex:0]; controlView.frame = CGRectMake(100,200,100,100); controlView.backgroundColor = [UIColor greenColor]; controlView.alpha = 1; controlView.opaque = YES; CALayer *controlViewLayer = controlView.layer; [controlViewLayer insertSublayer:glView.layer above:controlViewLayer]; [self setupGL]; </code></pre> <p>Within <strong>drawInRect</strong> I have: glClearColor(0,0,0,0);</p> <p>The result is that my GLKView animation renders with a black/clear background, but I cannot see my UIView containing the button.</p> <p>Any ideas? Thanks, Dave</p>

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