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# Flutter Roadmap
## Dart Basics
- [x] VARIABLES
- [x] var
- [x] dynamic
- [x] int
- [x] String
- [x] double
- [x] bool
- [x] FINAL AND CONST
- [x] STRINGS
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code sample
```bash
DefaultTabController(
length: 2,
child: NestedScrollView(
physics: BouncingScrollPhysics(),
head…
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Hi.
## Use case
This is about two very useful widgets:
* [`AnimatedSwitcher`](https://api.flutter.dev/flutter/widgets/AnimatedSwitcher-class.html)
* [`IndexedStack`](https://api.flutter.dev/fl…
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A medium-large project for somebody, which will require some exploration and some design discussion. A PR implementing this feature is unlikely to get merged if there has not been a preliminary discus…
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Hi
in the FormGroup, I have two control when the user change the value, it does not validate until moving focus multiple time to other widget, then the error will be shown.
```dart
'email': FormC…
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### 1. 设置图片圆角
``` Swift
thumbnailImageView.layer.cornerRadius = thumbnailImageView.frame.size.width / 2
thumbnailImageView.clipsToBounds = true
```
### 2. UIAlertController
``` Swift
// Create an op…
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Could not find any version that matches com.facebook.react:react-native:0.20.+.
Versions that do not match: 0.70.4
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## Steps to Reproduce
I have a small app here: https://github.com/maks/flutter-space
that demonstrates the issue.
Its basically just the example code from the [NestedScrollView documentation](…
maks updated
6 months ago
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I used the package in another project with RN 0.63+ and everything worked well .
But after upgrading to the latest version, the following error will cause:
```
A problem occurred configuring pr…
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When trying to dynamically update the number of tabs with a new TabController, an exception is thrown because the animation library attempts to reach an AnimationController that is no longer available…