快照hasData即使响应也返回false。身体有数据[颤振]

尝试(&T);抓住你的 getCurrentWeather 代码块,我们可以得到以下异常:

flutter: exception type 'String' is not a subtype of type 'int' of 'index'

响应json类似于:

{
    "weather":[
        {
            "id":803,
            "main":"Clouds",
            "description":"broken clouds",
            "icon":"04d"
        }
    ],
}

您的代码 description: jsonn['weather']['description'] 应该是 description: jsonn['weather'][0]['description'],

出现错误是因为您分析了响应。身体处于错误的等级。 试试这个模型课

 class WeatherModelCurrent {
  WeatherModelCurrent({
this.coord,
this.weather,
this.base,
this.main,
this.visibility,
this.wind,
this.clouds,
this.dt,
this.sys,
this.timezone,
this.id,
this.name,
this.cod,
 });

 final Coord? coord;
 final List<Weather>? weather;
 final String? base;
final Main? main;
 final int? visibility;
 final Wind? wind;
 final Clouds? clouds;
 final int? dt;
 final Sys? sys;
 final int? timezone;
 final int? id;
 final String? name;
   final int? cod;

     factory WeatherModelCurrent.fromJson(Map<String, dynamic> json) =>  WeatherModelCurrent(
coord: Coord.fromJson(json["coord"]),
weather: List<Weather>.from(json["weather"].map((x) =>   Weather.fromJson(x))),
base: json["base"],
main: Main.fromJson(json["main"]),
visibility: json["visibility"],
wind: Wind.fromJson(json["wind"]),
clouds: Clouds.fromJson(json["clouds"]),
dt: json["dt"],
sys: Sys.fromJson(json["sys"]),
timezone: json["timezone"],
id: json["id"],
name: json["name"],
cod: json["cod"],
  );

  Map<String, dynamic> toJson() => {
  "coord": coord!.toJson(),
"weather": List<dynamic>.from(weather!.map((x) => x.toJson())),
"base": base,
"main": main!.toJson(),
"visibility": visibility,
"wind": wind!.toJson(),
"clouds": clouds!.toJson(),
"dt": dt,
"sys": sys!.toJson(),
"timezone": timezone,
"id": id,
"name": name,
"cod": cod,
};
}

class Clouds {
 Clouds({
this.all,
});

final int? all;

 factory Clouds.fromJson(Map<String, dynamic> json) => Clouds(
all: json["all"],
 );

 Map<String, dynamic> toJson() => {
 "all": all,
  };
 }

  class Coord {
 Coord({
this.lon,
this.lat,
});

final double? lon;
 final double? lat;

 factory Coord.fromJson(Map<String, dynamic> json) => Coord(
  lon: json["lon"].toDouble(),
  lat: json["lat"].toDouble(),
);

Map<String, dynamic> toJson() => {
"lon": lon,
"lat": lat,
 };
  }

  class Main {
Main({
this.temp,
this.feelsLike,
this.tempMin,
this.tempMax,
this.pressure,
this.humidity,
 });

 final double? temp;
final double? feelsLike;
final double? tempMin;
final double? tempMax;
final int? pressure;
final int? humidity;

factory Main.fromJson(Map<String, dynamic> json) => Main(
temp: json["temp"].toDouble(),
feelsLike: json["feels_like"].toDouble(),
tempMin: json["temp_min"].toDouble(),
tempMax: json["temp_max"].toDouble(),
pressure: json["pressure"],
humidity: json["humidity"],
);

Map<String, dynamic> toJson() => {
"temp": temp,
"feels_like": feelsLike,
"temp_min": tempMin,
"temp_max": tempMax,
"pressure": pressure,
"humidity": humidity,
  };
    }

 class Sys {
 Sys({
this.type,
this.id,
this.country,
this.sunrise,
this.sunset,
 });

 final int? type;
 final int? id;
final String? country;
final int? sunrise;
 final int? sunset;

 factory Sys.fromJson(Map<String, dynamic> json) => Sys(
type: json["type"],
id: json["id"],
country: json["country"],
sunrise: json["sunrise"],
sunset: json["sunset"],
 );

 Map<String, dynamic> toJson() => {
"type": type,
"id": id,
"country": country,
"sunrise": sunrise,
"sunset": sunset,
 };
  }

  class Weather {
  Weather({
this.id,
this.main,
this.description,
this.icon,
});

final int? id;
final String? main;
final String? description;
final String? icon;

 factory Weather.fromJson(Map<String, dynamic> json) => Weather(
  id: json["id"],
  main: json["main"],
  description: json["description"],
  icon: json["icon"],
);

Map<String, dynamic> toJson() => {
"id": id,
"main": main,
"description": description,
"icon": icon,
 };
}

  class Wind {
  Wind({
this.speed,
this.deg,
});

final double? speed;
final int? deg;

 factory Wind.fromJson(Map<String, dynamic> json) => Wind(
  speed: json["speed"].toDouble(),
  deg: json["deg"],
   );

Map<String, dynamic> toJson() => {
  "speed": speed,
  "deg": deg,
};
  }