Flutter GetX 状态管理无法更新变量状态

Question

我不能用.obs改变任何变量的状态,RxType和Rx ();

当我试图改变它时，它会给出错误，不能将值类型int分配给变量类型RxInt。下面是代码:

class StateController extends GetxController {
late String sunrise;
late String sunset;
late int temperatureDegree;
late int maxDegree;
late int minDegree;
late double windSpeed;
late int humidity;

void updateUI(dynamic weatherDataInput) {
sunrise = weatherDataInput["current"]["sunrise"];
sunset = weatherDataInput["current"]["sunset"];
temperatureDegree = weatherDataInput["current"]["temp"];
maxDegree = weatherDataInput["daily"][0]["temp"]["max"];
minDegree = weatherDataInput["daily"][0]["temp"]["min"];
windSpeed = weatherDataInput["current"]["wind_speed"];
humidity = weatherDataInput["current"]["humidity"];
}
}

Answer 1

试试这个方法，

class NameController extends GetxController{

final sunrise = ''.obs;

void updateSomeText(){
sunrise('Text updated'); //or  sunrise(weatherDataInput["current"] 
//["sunrise"].toString());
}
}

然后更新它，尝试用Obx包装它，例如:

final controller = Get.put(NameController());
Obx(
()=> Text(controller.sunrise.value)
),

Answer 2

您可以像这样在updateUI()的末尾使用update()方法:

void updateUI(dynamic weatherDataInput) {
sunrise = weatherDataInput["current"]["sunrise"];
sunset = weatherDataInput["current"]["sunset"];
temperatureDegree = weatherDataInput["current"]["temp"];
maxDegree = weatherDataInput["daily"][0]["temp"]["max"];
minDegree = weatherDataInput["daily"][0]["temp"]["min"];
windSpeed = weatherDataInput["current"]["wind_speed"];
humidity = weatherDataInput["current"]["humidity"];
update(); 
}

,然后在UI中使用GetBuilder，或者，你应该将变量声明为Rx，例如:

RxString sunrise = "".obs;
RxString sunset = "".obs;

并在UI中使用观察者小部件:

Obx(
()=> Text(controller.sunset.value)
)

当可观察对象(日出和日落)发生变化时，这将自动更新你的UI。.