Displaying a string with Core Animation

[Gabriel Zachmann]

I am at a loss at how to display a single string at the bottom left in a view with core animation. The view is actually a ScreensaverView, and the string is a status message that should be always in front of the other layer(s). The other layer contains just an image; the layer gets removed at some point, at which I add another layer to the main layer (this transaction is animated).

Right now I tried this:

    // make the view layer-backed and become the delegate for the layer
    self.wantsLayer = YES;
    mainLayer_ = self.layer;
    mainLayer_.name = @"mainLayer";
    mainLayer_.zPosition = 0.0;
    mainLayer_.delegate = self;
    [mainLayer_ setNeedsDisplay];





    [[NSColor blackColor] set];
    NSRectFill(rects);


    ...
    NSShadow * shadow1 = [[NSShadow alloc] init];
    ...

    [str drawAtPoint: NSMakePoint(0,0)];

This sort of works, EXCEPT that the string is always behind the image!



But that never gets displayed.

Any help will be highly appreciated.

Best regards,
Gabriel.

Then, I create one layer containing the image and add it to the mainLayer. Eventually, the method drawRect: of my screensaverview gets called, where I render the string like so: NSMutableAttributedString * str = [[NSMutableAttributedString alloc] initWithString: mesg]; [str addAttribute: NSShadowAttributeName value: shadow1 range: NSMakeRange(0, [str length])]; I tried to set the zPosition of my image sub-layer to either +1.0 or -1.0, to no avail. I also tried to make my view layer hosted and add a CATextLayer with the string property set to my message string (and font and fontSize).

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