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iOS Tutorial: Creating a FireMonkey iOS Application

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Go Up to iOS Tutorials: Delphi iOS Application Development


This topic describes how to create a "Hello World" FireMonkey application for the iOS target platform.

Before You Start

To develop iOS applications using RAD Studio, you need to complete some important configuration steps. This tutorial assumes that you have completed all the necessary setup steps.
For details, see:

Step 1: Create a New FireMonkey Application for iOS

  1. Select File > New > FireMonkey Mobile Application - Delphi:
    FireMonkey Mobile Application WizardRev3.png

  2. Select Blank Application.
The FireMonkey Mobile Form Designer shows a new form for an iOS Application:
Blank FireMonkey iOS application.png


Step 2: Place Components on the FireMonkey iOS Form

The first step in creating a FireMonkey iOS application is designing the user interface, the same first step when you are targeting desktop platforms. There are many reusable components available in the IDE for creating user interfaces.

  1. Move the mouse pointer over the Tool Palette, and expand the Standard category by clicking the plus (+) icon next to the category name.
  2. Select the TEdit component and drop it onto the Form Designer. An instance of the TEdit component appears on the form:

Standard Tab.png TEdit on ToolPalette for FireMonkey.png


Repeat these steps, but now add a TLabel and a TButton component to the form. Select the button and change the Text property in the Object Inspector to "Say Hello".

Now you should see three components on the Form Designer:

Development an iOS application on Windows.png


After you place these components on the Form Designer, the IDE automatically sets names for the components.

To see or to change the name of a component, click the component on the Form Designer, and then find its Name property on the Object Inspector and the Structure View:

See Name Property of FireMonkey Button.png


For a TButton component, the component name is set by default to Button1 (or Button2, Button3, depending on how many TButtons you have created in this application).

The form on which these components are located also has a name. Select the background of the FireMonkey Mobile Form Designer, and select the Name property in the Object Inspector. The name of the form Form1 (or Form2, Form3,...) is displayed. You can also locate the name of the form in the Structure View:

See Form2 at Structure View.png


You can easily switch to source code by selecting the Code tab at the bottom of the Form Designer or pressing the F12 key. You can switch between the Form Designer and the Code Editor any time you want:

Switch to source.png


When you switch to the Code Editor, you can see the source code that the IDE has generated. You should find three components defined (Edit1, Label1, and Button1):

Source code of new iOS app.png


Step 3: Write an Event Handler in Delphi for a Button Click by the User

The next step is defining an event handler for the TButton component. You can define event handlers for your FireMonkey iOS application in the same way you define event handlers for desktop applications. For the TButton component, the most typical event is a button click.

Double-click the button on the Form Designer, and RAD Studio creates skeleton code that you can use to implement an event handler for the button click event:

New form code.png


Now you can implement responses within the begin and end statements of the Button1Click method.

The following code snippet implements a response that displays a small dialog box, which reads "Hello + <name entered into the edit box>":

 Label1.Text := 'Hello ' + Edit1.Text + ' !';

In Delphi, the quotation marks that surround string literals must be straight single quotation marks (that is, 'string'). You can use the plus (+) sign to concatenate strings. If you need a single quote inside a string, you can use two consecutive single quotes inside a string, which yields a single quote.

While you are typing code, some tooltip hints appear, indicating the kind of parameter you need to specify. The tooltip hints also display the kinds of members that are supported in a given class:

CodeInsight in action for FireMonkey application.png


Step 4: Test Your iOS Application on the Mac (iOS Simulator)

The implementation of this application is finished, so now you can run the application. You can click the Run button (RunButton.jpg) in the IDE, press F9, or select Run > Run from the RAD Studio main menu:

Run my first FireMonkey application.png


By default, FireMonkey iOS applications run on the iOS Simulator target platform. You can confirm the target platform in the Project Manager:



When you run your application, it is deployed to the Mac and then to the iOS Simulator on the Mac. For our app, a form with an edit box and a button is displayed. Enter text into the edit box, and click the Say Hello button:



Step 5: Test Your iOS Application on a Connected iOS Device

If you complete the steps described in IOS Tutorial: Set Up Your Development Environment on the Mac and iOS Tutorial: Set Up Your Development Environment on Windows PC before creating your new project, you can now run your iOS app on an iOS device connected to your Mac by USB cable.

To run your iOS app on a connected iOS device, first select the iOS Device target platform so that the Platform Assistant deploys the application to the connected iOS Device:


After you select the iOS Device target platform, run your iOS app by clicking the Run button in the IDE, pressing F9 or selecting Run > Run.

On your Mac, you might see a dialog asking your permission to code sign your iOS app. Select either "Always Allow" or "Allow" to sign your app.


Then go to your iOS device and wait for your FireMonkey iOS app to appear. Watch for the FireMonkey launch image (available in $(BDS)\bin\Artwork\iOS):


See Also

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