uiapplication

What describes the Application Delegate best? How does it fit into the whole concept?

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In Cocoa, a delegate is an object that another object defers to on questions of behavior and informs about changes in its state. For instance, a UITableViewDelegate is responsible for answering questions about how the UITableView should behave when selections are made or rows are reordered. It is the object that the UITableView asks when … Read more

-[UIApplication delegate] must be called from main thread only

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Just call it from the main thread like this. Objective-C dispatch_async(dispatch_get_main_queue(), ^{ [[UIApplication delegate] fooBar]; }); Swift DispatchQueue.main.async { YourUIControlMethod() } Reaching out to your app delegate like this, is a hint that your architecture could use a little cleanup. You can call delegates from any thread you want. You only need to make sure … Read more

Is this possible to apply the alternative icon to the iOS application?

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Yes, this is possible since iOS 10.3. First, you need to define all alternative icons in your Info.plist file, you can’t fetch them dynamically. In the example below we define 2 alternative icons: “de” and “fr”: <key>CFBundleIcons</key> <dict> <key>CFBundleAlternateIcons</key> <dict> <key>de</key> <dict> <key>CFBundleIconFiles</key> <array> <string>ic_de</string> </array> <key>UIPrerenderedIcon</key> <false/> </dict> <key>fr</key> <dict> <key>CFBundleIconFiles</key> <array> <string>ic_fr</string> </array> … Read more

Adding view on StatusBar in iPhone

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You can easily accomplish this by creating your own window above the existing status bar. Just create a simple subclass of UIWindow with the following override of initWithFrame: @interface ACStatusBarOverlayWindow : UIWindow { } @end @implementation ACStatusBarOverlayWindow – (id)initWithFrame:(CGRect)frame { if ((self = [super initWithFrame:frame])) { // Place the window on the correct level and … Read more