flutter_intro 3.4.0 flutter_intro: ^3.4.0 copied to clipboard
A better way for new feature introduction and step-by-step users guide for your Flutter project.
flutter_intro #
A better way for new feature introduction and step-by-step user guide for your Flutter project.
Features #
- The guide widget is capable of adapting to device orientation.
- Supports custom rendering of the guide widget overlay content.
- Supports grouping of guide pages, facilitating the display of multiple guide groups on a single page.
- Supports guiding widgets that are rendered with a delay.
Usage #
To use this package, add flutter_intro
as a dependency in your pubspec.yaml file.
Init #
Wrap the app root widget with Intro
. You can also set some global properties on Intro
as seen
below.
import 'package:flutter_intro/flutter_intro.dart';
Intro(
/// Padding of the highlighted area and the widget
padding: const EdgeInsets.all(8),
/// Border radius of the highlighted area
borderRadius: BorderRadius.all(Radius.circular(4)),
/// The mask color of step page
maskColor: const Color.fromRGBO(0, 0, 0, .6);
/// Toggle animation
noAnimation: false;
/// Toggle whether the mask can be closed
maskClosable: false;
/// Build custom button
buttonBuilder: (order) {
return IntroButtonConfig(
text: order == 3 ? 'Custom Button Text' : 'Next',
height: order == 3 ? 48 : null,
fontSize: order == 3 ? 24 : null,
style: order == 3
? OutlinedButton.styleFrom(
backgroundColor: Colors.red,
)
: null,
);
},
/// High-level widget
child: const YourApp(),
)
Add guided widget #
Wrap a widget with IntroStepBuilder
, placing the original widget inside builder
and applying the
key
so it can be found.
order
must be defined uniquely per route so that the unique key
can be generated.
/// See docs for full list of properties, some of which override [Intro] ones
IntroStepBuilder(
/// Required: use unique int for each step to set guide order
order: 1,
/// Use either `text` or `overlayBuilder` to create guide content (see "Advanced Usage" for latter
/// example).
/// Use text to quickly add leading text
text: 'Use this widget to...',
/// Required: provide function that returns a `Widget` with the key
builder: (BuildContext context, GlobalKey key) => NeedGuideWidget(
/// Bind the key to whatever is returned
key: key,
),
)
Run #
That's it!
Intro.of(context).start();
Advanced Usage #
/// See `example/lib/advanced_usage.dart` for more details
IntroStepBuilder(
order: 2,
/// Create a customized guide widget
overlayBuilder: (StepWidgetParams params) {
return YourCustomOverlay();
},
)
StepWidgetParams
provides many useful parameters to generate the guide overlay, as seen below.
Troubleshooting #
Q1. What if the highlighted area is not displayed completely? #
A1. That's because Intro provides 8px padding by default.
We can change it by setting the value of padding
.
Intro(
/// Set padding to zero (or negative) to reduce highlight size
padding: EdgeInsets.zero,
child: const YourApp(),
);
Q2. Can I set different configurations for each step? #
A2. Yes, you can configure every IntroStepBuilder
.
IntroStepBuilder(
order: 3,
padding: const EdgeInsets.symmetric(vertical: 5, horizontal: 5),
borderRadius: const BorderRadius.all(Radius.circular(64)),
builder: (context, key) => YourWidget(),
)
Q3. Can I make the highlight area smaller? #
A3. Yes, can do it by setting padding
to a negative number.
IntroStepBuilder(
order: 4,
/// Reduce highlight size further
padding: const EdgeInsets.symmetric(
vertical: -5,
horizontal: -5,
),
builder: (context, key) => YourWidget(),
)
Q4. If the user presses or gestures "back", an exception happens. How do I avoid this? #
A4. You can call the dispose method of the intro instance.
WillPopScope(
child: Scaffold(...),
onWillPop: () async {
final Intro intro = Intro.of(context);
if (intro.status.isOpen == true) {
intro.dispose();
return false;
}
return true;
},
)
Q5. WillPopScope
is deprecated, is there any better solution? #
A5. As of v3.1.0, you can use ValueNotifier<IntroStatus> statusNotifier
.
You can achieve the same effect through the following sample code.
ValueListenableBuilder(
valueListenable: intro.statusNotifier,
builder: (context, value, child) {
return PopScope(
canPop: !value.isOpen,
onPopInvoked: (didPop) {
if (!didPop) {
intro.dispose();
}
},
child: Scaffold(...),
);
},
)
Example #
Please check the example in example/lib/main.dart
.