Glimpse of iOS developers on flutter Part 2

Glimpse of iOS developers on flutter Part 2

  • View Controllers – In iOS, a ViewController is something which represents a bit of UI i.e user interface, which is commonly mostly used for a screen. These are basically possessed together to frame difficult user interfaces, and to help you to map your application’s UI. Whereas in Flutter, this is basically done by the Widgets, UI screens in Flutter are basically represented by the Widgets since in flutter everything is a widget.


glimpse of ios developers on flutter part 2
glimpse of ios developers on flutter part 2


•  Gestures Detections and click listeners-

In iOS, an GestureRecognizer is attatched to a UIview to handle different click events. In Flutter, there are basically two ways to add touch listeners which are mentioned below:

  1. In the first case you will have to check if the widget is backing up event detection, then pass a function to it, and accordingly then handle the different events in the suitable function. Check on to the example mentioned below to get more clarity.

Example: @override

Widget build(BuildContext context) {

return new RaisedButton(

onPressed: () {



child: new Text(“Button”),



  1. Second is the case in which the Widget does not support the detection of the events, so then you will have to go for the alternative i.e wrap the widget in a Gesture Detector and then pass a function accordingly to the onTap parameter. Check the example for the more clarity.

Example: class SampleApp extends StatelessWidget {


Widget build(BuildContext context) {

return new Scaffold(

body: new Center(

child: new GestureDetector(

child: new FlutterLogo(

size: 200.0,),

onTap: () {print(“tap”);




  • Databases and local storage– In iOS, collection of key-value pairs is stored using a property called list, also known as the User Defaults. Whereas in Flutter, you will have to access equivalent functionality using the Shared Preferences Plugins. This plugin is basically used to wrap the functionality of both the User Defaults and the Android equivalent, Shared Preferences.
  • NotificationsIn iOS, first you need to register your application on the developer portal to allow it push the various notifications. Whereas In Flutter, you can easily have the access this functionality using the firebase messaging






37 thoughts on “  Glimpse of iOS developers on flutter Part 2

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