Chapter 11Activity Progress and Alerting Users
Key Skills & Concepts
• Using a UIActivityIndicatorView to indicate processing
• Using a UIProgressView to indicate processing
• Using a UIAlertView to warn users
• Using a UIActionSheet to inform users
• Using application badges to remind users of items needing their attention
While processing, many times an application must inform users that they must wait. A poorly constructed application provides no graphical clue that the application is busy processing; a well-constructed application does provide a graphical clue. The iOS SDK provides the UIActivityIndicatorView and UIProgressView classes to tell a user to “please wait, I’m working.” The UIActivityIndicatorView uses a spinning “gear” to tell ...
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