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Window With Transparent Background
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Window With Transparent Background


  • Subject: Window With Transparent Background
  • From: Richard Charles <email@hidden>
  • Date: Tue, 24 Jan 2017 10:17:30 -0700

Consider a window presented as a sheet with background transparency.

- (void)windowDidLoad
{
    // Produces gray background with transparency.
    NSColor *color = [NSColor colorWithRed:0.5 green:0.5 blue:0.5 alpha:0.9];
    self.window.backgroundColor = color;
}

- (void)windowDidLoad
{
    // Produces near white background with no transparency.
    NSColor *color = [NSColor colorWithRed:0.6 green:0.6 blue:0.6 alpha:0.9];
    self.window.backgroundColor = color;
}

The first case produces a background with transparency.

The second case produces a background with no transparency.

Why does’t the second case yield any transparency?

--Richard Charles


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