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Flutter_Documentation

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brightness: Brightness.dark,
),
home: HomePage(),
);<code_end>
<topic_end>
<topic_start>
Styling text
In SwiftUI, you use modifier functions to style text.
For example, to change the font of a Text string,
use the font() modifier:To style text in Flutter, add a TextStyle widget as the value
of the style parameter of the Text widget.
<code_start> Text(
'Hello, world!',
style: TextStyle(
fontSize: 30,
fontWeight: FontWeight.bold,
color: CupertinoColors.systemYellow,
),
),<code_end>
<topic_end>
<topic_start>
Styling buttons
In SwiftUI, you use modifier functions to style buttons.To style button widgets in Flutter, set the style of its child,
or modify properties on the button itself.In the following example:
<code_start>child: CupertinoButton(
color: CupertinoColors.systemYellow,
onPressed: () {},
padding: const EdgeInsets.all(16),
child: const Text(
'Do something',
style: TextStyle(
color: CupertinoColors.systemBlue,
fontSize: 30,
fontWeight: FontWeight.bold,
),
),
),<code_end>
<topic_end>
<topic_start>
Using custom fonts
In SwiftUI, you can use a custom font in your app in two steps.
First, add the font file to your SwiftUI project. After adding the file,
use the .font() modifier to apply it to your UI components.In Flutter, you control your resources with a file
named pubspec.yaml. This file is platform agnostic.
To add a custom font to your project, follow these steps:Add your custom font(s) under the fonts section.After you add the font to your project, you can use it as in the
following example:
<code_start> Text(
'Cupertino',
style: TextStyle(
fontSize: 40,
fontFamily: 'BungeeSpice',
),
)<code_end>
info Note
To download custom fonts to use in your apps,
check out Google Fonts.<topic_end>
<topic_start>
Bundling images in apps
In SwiftUI, you first add the image files to Assets.xcassets,
then use the Image view to display the images.To add images in Flutter, follow a method similar to how you added
custom fonts.Add this asset to the pubspec.yaml file.After adding your image, display it using the Image widget’s
.asset() constructor. This constructor:To review a complete example, check out the Image docs.<topic_end>
<topic_start>
Bundling videos in apps
In SwiftUI, you bundle a local video file with your app in two
steps.
First, you import the AVKit framework, then you instantiate a
VideoPlayer view.In Flutter, add the video_player plugin to your project.
This plugin allows you to create a video player that works on
Android, iOS, and on the web from the same codebase.To review a complete walkthrough, check out the video_player example.
<topic_end>
<topic_start>Flutter for UIKit developers
iOS developers with experience using UIKit
who want to write mobile apps using Flutter
should review this guide.
It explains how to apply existing UIKit knowledge to Flutter.info Note
If you have experience building apps with SwiftUI,
check out Flutter for SwiftUI developers instead.Flutter is a framework for building cross-platform applications
that uses the Dart programming language.
To understand some differences between programming with Dart
and programming with Swift, see Learning Dart as a Swift Developer
and Flutter concurrency for Swift developers.Your iOS and UIKit knowledge and experience
are highly valuable when building with Flutter.
Flutter also makes a number of adaptations
to app behavior when running on iOS.
To learn how, see Platform adaptations.info
To integrate Flutter code into an existing iOS app,
check out Add Flutter to existing app.Use this guide as a cookbook.
Jump around and find questions that address your most relevant needs.<topic_end>
<topic_start>
Overview
As an introduction, watch the following video.
It outlines how Flutter works on iOS and how to use Flutter to build iOS apps.<topic_end>
<topic_start>
Views vs. Widgets
How is react-style, or declarative,
programming different from the
traditional imperative style?
For a comparison, see Introduction to declarative UI.In UIKit, most of what you create in the UI is done using view objects,
which are instances of the UIView class.