iOS 判断设备类型是iPhone 还是iPad

/*
public enum UIUserInterfaceIdiom : Int {
    
    case unspecified

    @available(iOS 3.2, *)
    case phone // iPhone and iPod touch style UI

    @available(iOS 3.2, *)
    case pad // iPad style UI

    @available(iOS 9.0, *)
    case tv // Apple TV style UI

    @available(iOS 9.0, *)
    case carPlay // CarPlay style UI
}
*/
if UIDevice.current.userInterfaceIdiom == UIUserInterfaceIdiom.phone {
   // iPhone
}
if UIDevice.current.userInterfaceIdiom == UIUserInterfaceIdiom.pad {
   // iPad
}