When designing apps for current generations of Apple iPhone, iPad, and iPod devices, application developers must use a certain set of images meeting Apple’s stringent Custom Icon and Image Creation Guidelines. As a bare minimum, developers need an application icon and a launch image. However, Apple recommends that apps provide quite a few additional images, such as an icon used by the system when displaying Spotlight search results and Settings. Apps that can open certain file types (such as documents, audio, or video clips) will need images to represent their supported file formats. Most apps will also require a good deal of graphics to draw their navigation bars, tab bars and toolbars.
As a rule of thumb, Apple imposes very strict requirements on how to draw these icons so that each app running on the iPhone, iPad, or iPod platform conforms to general specifications and visual guidelines. Specifications ensure that your app looks in line with products offered by Apple and third-party developers.
Designing Icons for the Retina Display
Apple’s new pixel-packed Retina display packs more dots into a small area than was possible just a few years ago. These high-definition displays allow displaying the highest definition graphics to display crisp images with the feel of dimensionality and depth. As such, Retina displays will demand higher resolution graphics to be employed in navigation bars, toolbars, and tab bars. Texture-reach, detailed, and more realistic images with multiple small elements and engravings will create the most pleasing effect of three-dimensionality and depth. To look great graphics on Retina displays, developers need their icons in resolutions of 60×60 pixels.
Icons for Navigation Bars, Toolbars, and Tab Bars
While, generally, apps can use artwork in any supported size or resolution, there are a few common sizes your icons must include in order for the system to display them properly in navigation bars, toolbars, and tab bars.
For iPhone and iPod touch toolbar and navigation bars, Apple specifies the image resolutions of 20 x 20 pixels (standard resolution) and 40 x 40 pixels (high definition, for Retina displays). Toolbar and navigation bars in iPad apps will display 20 x 20 pixel versions exclusively.
Tab bar icons are specified in two sizes. 30 x 30 pixel icons are employed in tab bars displayed in iPad, iPhone and iPod touch apps in standard resolution. In addition, iPhone and iPod touch apps with the Retina display will benefit from using super-sized images in sizes of 60 x 60 pixels.
Stock Icons for iPhone, iPad, and iPod Navigation Bars, Toolbars, and Tab Bars
Aha-Soft offers a collection of ready-made royalty-free icons conforming to Apple’s navigation bar, toolbar and tab bar guidelines. App Tab Bar Icons for iPhone offer an easy way to produce stunning navigation bars, toolbars, and tab bars in iPhone, iPad, and iPod apps. 120 different application icons are provided in all standard sizes of 20×20, 30×30, 40×40, and 60×60 pixels. Each image is supplied in black and white versions. Raster PNG and PSD files and scalable vector AI, SVG, and PDF sources are provided.
Do you want to design pictograms yourself? Read more at iconeditor.info