iOS 10.3 - How to change app icon programmatically [duplicate]

Answer 1

Yes, iOS 10.3 finally gives developers the ability to change their app’s icon programmatically.

It is possible to change appIcon from iOS 10.3. For that you need to set supportsAlternateIcon to Yes in info.plist.

Both primary and secondary icons should be added in CFBundleIcons key of your app's Info.plist file.

//Info.plist
CFBundleIcons

    CFBundleAlternateIcons
    
        Icon1
        
            CFBundleIconFiles
            
                alternater1
            
            UIPrerenderedIcon
            
        
        Icon2
        
            CFBundleIconFiles
            
                alternater2
            
        
    

To change App Icon following UIApplication method needs to be called:

Objective C:

[[UIApplication sharedApplication] setAlternateIconName:@"alternater2" completionHandler:^(NSError * _Nullable error) {
        NSLog(@"Error...");
}];

Swift 3:

if UIApplication.shared.supportsAlternateIcons{
        UIApplication.shared.setAlternateIconName("alternater2", completionHandler: { (error) in
            print(error ?? "")
        })
}

For more detailed tutorial, See:
Apple Document: setAlternateIconName(_:completionHandler:)
How to change your app icon dynamically with setAlternateIconName()