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POiPhone SDK: Non-transparent subviews in transparent view
 

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    <p>I have a subview that has been added to my UIView. The idea is that the subview is a hovering panel with uibuttons. The subview is given an alpha of 0.2, as the user needs to be able to see what is behind it. </p> <p>The problem is that when I add uibuttons to the subview, they inherit the alpha from the subview (I want the buttons to be non-transparent and have an alpha of 1.0). I've tried to tackle this problem by iterating through the uibuttons and setting their alpha back to 1.0 without success. Solutions?</p> <pre><code> // Create the subview and add it to the view topHoverView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 50)]; topHoverView.backgroundColor = [UIColor blackColor]; [topHoverView setAlpha:0.2]; [self.view addSubview:topHoverView]; // Add button 1 button1 = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button1 setFrame:CGRectMake(20, 10, 80, 30)]; [button1 setTitle:@"New" forState:UIControlStateNormal]; [button1 addTarget:self action:@selector(button1Action:) forControlEvents:UIControlEventTouchUpInside]; [topHoverView addSubview:button1]; // Add button 2 button2 = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button2 setFrame:CGRectMake(120, 10, 80, 30)]; [button2 setTitle:@"Clear" forState:UIControlStateNormal]; [button2 addTarget:self action:@selector(button2Action:) forControlEvents:UIControlEventTouchUpInside]; [topHoverView addSubview:button2]; // Add button 3 button3 = [UIButton buttonWithType:UIButtonTypeRoundedRect]; [button3 setFrame:CGRectMake(220, 10, 80, 30)]; [button3 setTitle:@"Delete" forState:UIControlStateNormal]; [button3 addTarget:self action:@selector(button3Action:) forControlEvents:UIControlEventTouchUpInside]; [topHoverView addSubview:d button3]; // Attempt to iterate through the subviews (buttons) to set their transparency back to 1.0 for (UIView *subView in topHoverView.subviews) { subView.alpha = 1.0; } </code></pre>
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