Photoshop layer styles for iOS icons. Stop maintaining a separate file for each color, resolution, a...
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MOOMaskedIconView is a UIView subclass that uses black-and-white masks to draw icons of different styles at any size or resolution. It's like Photoshop layer styles, using the same technique as UITabBar to generate various effects from a single icon mask.
MOOMaskedIconView displays common image formats and PDFs, the native vector file format of iOS and OS X. PDFs are best—they're easy to maintain and resolution independent.
MOOMaskedIconView *iconView = [MOOMaskedIconView iconWithResourceNamed:@"icon.png"] iconView.color = [UIColor greenColor]; [self.view addSubview:iconView];
MOOStyleTrait *grayGradientTrait = [MOOStyleTrait trait]; grayGradientTrait.gradientColors = [NSArray arrayWithObjects:[UIColor colorWithWhite:0.7f alpha:1.0f], [UIColor colorWithWhite:0.5f alpha:1.0f], nil];
MOOMaskedIconView *iconView = [MOOMaskedIconView iconWithPDFNamed:@"icon.pdf" size:CGSizeMake(32.0f, 26.0f)]; [iconView mixInTrait:grayGradientTrait]; [self.view addSubview:iconView];
UIImage *overlay = [UIImage imageNamed:@"overlay.png"]; MOOMaskedIconView *iconView = [MOOMaskedIconView iconWithImageNamed:@"icon.png"]; iconView.color = [UIColor redColor]; iconView.overlay = overlay; iconView.shadowColor = [UIColor darkGrayColor]; iconView.shadowOffset = CGSizeMake(3.0f, 3.0f); [self.view addSubview:iconView];
MOOMaskedIconView *iconView = [MOOMaskedIconView iconWithResourceNamed:@"icon.pdf"]; iconView.color = [UIColor magentaColor]; iconView.highlightedColor = [UIColor orangeColor]; UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; [button setImage:[iconView renderImage] forState:UIControlStateNormal] [button setImage:[iconView renderHighlightedImage] forState:UIControlStateHighlighted]; [self.view addSubview:button];
For more examples, check out the Demo Project.
For the full list of styleable properties, see MOOMaskedIconViewStyles.
For information on reusable styles, caching, and other advanced topics, see Advanced Use.
In your project's folder, type:
git submodule add git://github.com/peyton/MOOMaskedIconView.git
A submodule allows your repository to contain a clone of an external project. If you don't want a submodule, use:
git clone git://github.com/peyton/MOOMaskedIconView.git
MOOMaskedIconView/into your Xcode project's file browser.
Note: An options dialog will pop up. If you're using MOOMaskedIconView as a submodule, you should uncheck "Copy items into destination group's folder (if needed)."
With your application's target selected in the navigator, click on the "Build Phases" tab. Under "Link Binary With Libraries," click the "+" button and add
cdinto the MOOMaskedIconView directory and run:
An image mask is a black-and-white image that clips drawing. Quartz clipping follows three simple rules:
Mask images may not use an alpha channel, so icons with transparency must be set on a white background. For more information about Quartz image masking, see the Quartz 2D Programming Guide.
MOOMaskedIconView makes it easy to use PDFs as icons, eliminating "*@2x.*" files. Many Apple applications on OS X use PDF icons for resolution independence.
Next to the network, the biggest source of latency on an iPhone is the disk. For small, simple icons the PDF format adds a few KB of overhead over PNG. Because the iPhone loads data in chunks, in practice the difference in loading time is nothing. For larger icons a PDF of vectors can save space.
Some editors need a little massaging to export PDFs suitable for iOS icons. How-to instructions are here.
Forks, patches, and other suggestions are always welcome and addressed as quickly as possible. Here's a quick guide to the process.