Question

我正试图通过自己的按钮调用连接到按钮的动作。可以这样做吗？为了澄清我的观点，我希望我的意思是：

[self.button callIBAction:self]

Answer 1

您需要发送触发按钮的事件，例如：

[self.button sendActionsForControlEvents:UIControlEventTouchUpInside]

或者，如果您在实现该操作的同一视图控制器中：

[self callIBAction:self.button]

Answer 2

class MyApp extends StatelessWidget {
  @override
  build(BuildContext context) {
    return MaterialApp(
        title: "My app title",
        home: MyStateFullWidget());
  }
}

class MyStateFullWidget extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return MyStateFullWidgetState();
  }
}

class MyStateFullWidgetState extends State<MyStateFullWidget> {
  int count = 0;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("My App"),
        backgroundColor: Colors.amber,
      ),
      body: Container(
        child: Center(
          child:Text("Count: $count"),
        ),
      ),
      persistentFooterButtons: <Widget>[
        FlatButton(
          onPressed: update,
          child: Text("Click Here"),
          color: Colors.amber,
          textColor: Colors.white,
        ),
      ],
    );
  }

  void update() {
    setState(() {
      count++;
    });
  }
}

iOS通话按钮通过按钮操作

2 个答案: