(IBAction)gonext:(id)sender { if ([[UIApplication sharedApplication] supportsAlternateIcons]) { NSString *name = [UIApplication sharedApplication].alternateIconName; if (name&&[name isEqualToString:@"changeicon"]) { [[UIApplication sharedApplication] setAlternateIconName:nil completionHandler:^(NSError * _Nullable error) { }

Hi 黑子 刘, Thank you for the sample project. Your alternate icons aren’t working because of several issues in the Info.plist file: keyCFBundleIcons/key dict keyCFBundleAlternateIcons/key dict keychangeicon/key dict keyIcon files/key array stringchangeicon/string /array /dict /dict keyCFBundlePrimaryIcon/key dict keyCFBundleIconFiles/key array string/string /array keyCFBundleIconName/key string/string keyUIPrerenderedIcon/key false/ /dict keyUINewsstandIcon/key dict keyCFBundleIconFiles/key array string/string /array keyUINewsstandBindingEdge/key stringUINewsstandBindingEdgeLeft/string keyUINewsstandBindingType/key stringUINewsstandBindingTypeMagazine/string /dict /dict For CFBundlePrimaryIcon, you aren’t declaring an icon name. Since your main app icon is defined by the asset catalog, you should remove CFBundlePrimaryIcon from the Info.plist file. Under CFBundleAlternateIcons, you have the key name Icon files. This should be CFBundleIconFiles. UINewsstandIcon is no longer used. Newsstand was an iOS feature that was removed in iOS 9. You should also remove this from the Info.plist file. On top of these Info.plist issues, you should provide icons that are correctly sized for every device. The details of these sizes for alternate app icons are documented in the User-Selectable App Icons section of the Human Interface Guidelines: https://developer.apple.com/design/human-interface-guidelines/ios/icons-and-images/app-icon/