Alert Indicators
When an application accesses the Internet from behind the scenes, it’s polite to let your user know what’s going on. You don’t have to create a full-screen alert because Cocoa Touch provides a simple application property that controls a spinning network activity indicator in the status bar. Figure 3-6 shows this indicator in action, to the right of the Wi-Fi indicator and to the left of the current time display.
Figure 3-6 The network activity indicator is controlled by a UIApplication property.
The following snippet demonstrates how to access this property, which requires you to do little more than toggle the indicator on or ...
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