依赖注入简介

1class First {
2  // 外部传入的依赖项
3  var dependency1;
4  var dependency2;
5
6  First(this.dependency1, this.dependency2);
7}
8
9class Second {
10  var one = 'ONE';
11  var two = 'TWO';
12
13  // 创建 First 类的实例并注入依赖项
14  var first = First(one, two);
15}

1class Widget1 extends StatelessWidget {
2  final String name;
3
4  Widget1(this.name);
5
6  @override
7  Widget build(BuildContext context) {
8    return Text(name);
9  }
10}
11
12class Widget2 extends StatelessWidget {
13  @override
14  Widget build(BuildContext context) {
15    return Container(
16      child: Widget1('Aachman'),
17    );
18  }
19}

1class Controller extends GetxController {
2  String name = 'Aachman';
3}

1class Widget1 extends StatelessWidget {
2  final Controller controller = Get.put(Controller());
3}

1class Widget2 extends StatelessWidget {
2  final Controller controller = Get.find();
3
4  @override
5  Widget build(BuildContext context) {
6    return Text(controller.name);
7  }
8}