Question

我已经尝试了各种各样的方法，但是我的代码似乎没有错误。我还检查了扑打医生，但仍然没有任何结果。谁能帮我，我是编码的初学者。我猜我的set状态类有问题，但是终端窗口中什么也没显示。请帮助我解决这个问题，在Google上找不到任何可以回答我问题的东西。

这是我的代码

class InputPage extends StatefulWidget {
  @override
  InputPageState createState() => InputPageState();
}


class InputPageState extends State<InputPage> {

  Color maleCardColor = inactiveCardColor;
  Color femaleCardColor = inactiveCardColor;

  void updateColor ( int gender) {
    // male was pressed
    if (gender == 1) {
      if (maleCardColor == inactiveCardColor) {
        maleCardColor = activeCardColor;
      } else {
        maleCardColor = inactiveCardColor;
      }
    }
    if (gender == 2) {
      if (femaleCardColor == inactiveCardColor) {
        femaleCardColor = activeCardColor;
      } else {
        femaleCardColor = inactiveCardColor;
      }
    }
  }


  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Color(0xFF10A0E21),
      appBar: AppBar(
        title: Text("BMI CALCULATOR",
        ),
        backgroundColor: Colors.black,
        centerTitle: true,
      ),
      body: Column(
           children: [
             Expanded(
               child: Row(
                children: [
                  Expanded(
                    child: GestureDetector(
                      onTap: () {
                        setState(() {
                          updateColor(1);
                        });
                      },
                      child: ReusableCard(
                        cardColor:inactiveCardColor,
                        cardChild: IconContent(
                        iconImage: FontAwesomeIcons.mars,
                        iconText: "MALE",) ,
                      ),
                    ),
                  ),
                  Expanded(
                    child:GestureDetector(
                      onTap: (){
                      setState(() {
                        updateColor(2);
                      });
                      },
                      child:ReusableCard(cardColor:inactiveCardColor,
                        cardChild: 
                       IconContent(iconImage:FontAwesomeIcons.venus,
                          iconText: "FEMALE",),
                      ),
                    ),`enter code here`
                  ),
                ],
              ),
            ),

Answer 1

使用setState改变状态

if (gender == 2) {
      if (femaleCardColor == inactiveCardColor) {
         setState((){
           femaleCardColor = activeCardColor;
         }); 
      } else {
         setState((){
        femaleCardColor = inactiveCardColor;
         }); 
      }
    }

还要从此处删除setState

setState(() {
   updateColor(2);
});

我的Flutter代码在模拟器上不起作用。手势检测器似乎无法检测到手势

1 个答案: