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INTERFACE BUILDER TUTORIAL XCODE 8 SOFTWARE
Although you gain much of this functionality “for free” (the iOS Voiceover software will read button labels, for example), you can provide additional assistance by configuring the accessibility attributes in Interface Builder. Using Voiceover, users can touch interface elements and hear a short description of what they do and how they can be used. Voiceover combines speech synthesis with a customized interface to aid users in navigating applications. iOS includes Apple’s screen-reader technology: Voiceover. Today, the technology is available for an interface to vocally describe itself to the visually impaired.
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Setting Accessibility Attributesįor many years, the “appearance” of an interface meant just how it looks visually. To help identify what an attribute does, use the documentation tool in Xcode to look up the object’s class and review the descriptions of its properties. The attributes you change in Interface Builder are simply properties of the object’s class. Select the label, and then open the Attributes Inspector, shown in Figure 5.10. Make sure the Empty.storyboard file is still open and that you’ve added a text label to the view. Let’s run through a quick example to see how this works. You can also choose View, Utilities, Show Attributes Inspector (Option+Command+4) if the Utility area isn’t currently visible. The most common place you’ll tweak the way your interface objects appear is through the Attributes Inspector, available by clicking the slider icon at the top of the Utility area. Although you could certainly configure things such as colors and fonts in your code, it’s easier to just use the tools included in Interface Builder. For many kinds of objects, literally dozens of different attributes can be adjusted. How your interface appears to the end user isn’t just a combination of control sizes and positions. Learn More Buy Customizing the Interface Appearance Sams Teach Yourself iOS 5 Application Development in 24 Hours, 3rd Edition