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[英]How to draw polygon on react native maps with many points(latitude and longitude)?
[英]How to draw polyline on react native maps with many points(latitude and longitude)?
嗨,我想在从 API 获取的多个位置之间画线
这是我来自 API 的数据
(3) [{…}, {…}, {…}]
0:
CONTACTPERSONID: 2017011300
ENABLEPOLL: 0
HARDWAREID: 409792319815
LANDMARKID: 0
MESSAGETIME: "2دقيقه پيش"
MOVINGSTATE: "m"
NICKNAME: "ایران 78 - 875 ع 73"
POSDESCRIPTION: "ايران: استان كرمان - شهربابك"
SENTDATE: "18:14"
SENTDATE1: "1398-06-23 18:14:16"
SIGNATURE: "1-Normal"
SPEED: 51
TRUCKSTATE: "در حال حرکت"
VEHICLETYPE: 0
XPOINT: 55.13055
YPOINT: 30.128971
__proto__: Object
1: {HARDWAREID: 420474797787, NICKNAME: "رضا نوری پور ایران 62 - 374 ع 66", SENTDATE: "18:05", XPOINT: 51.2906383, YPOINT: 35.6798033, …}
2: {HARDWAREID: 2225434572, NICKNAME: "عابدین پور 938ع43", SENTDATE: "17:16", XPOINT: 48.33547, YPOINT: 38.26992, …}
Xpoint 和 Ypoint 中的经纬度
这是我要显示的代码:
<View style={{ height: hp('50%'), width: wp('100%') }}>
<MapView
provider={PROVIDER_GOOGLE}
onLayout={this.onMapLayout}
style={styles.containerMap}
initialRegion={{
latitude: this.props.data ? this.props.data[0].YPOINT : '',
longitude: this.props.data ? this.props.data[0].XPOINT : '',
latitudeDelta: 0.0922,
longitudeDelta: 0.0421,
}} >
{this.state.isMapReady && this.props.data.map((value, index) => {
let poly = {
latitude: value.YPOINT,
longitude: value.XPOINT,
}
return < Polyline
strokeColor='#fd016f'
coordinates={poly}
/>
})
}
</MapView>
</View>
但收到此错误:**更新由以下人员管理的视图的属性“坐标”时出错:AIRMapPolyline **
看起来这个错误可能是因为折线的坐标为空或未定义。 尝试更改此代码:
let poly = {
latitude: value.YPOINT,
longitude: value.XPOINT,
}
具有以下内容:
let poly = {
latitude: value.YPOINT ? value.YPOINT : 0,
longitude: value.XPOINT ? value.XPOINT : 0,
}
希望这会有所帮助,让我知道它是否适合您。
另见相关:
更新由以下管理的视图的属性“坐标”时出错:AIRMapMarker (React native) https://github.com/react-native-community/react-native-maps/issues/1095
该代码逻辑错误,因为该代码在下面的代码中创建了一些带有一点的 polyLines 是正确的:我更改了我的代码并且工作正常:
<View style={{ height: hp('50%'), width: wp('100%') }}>
<MapView
provider={PROVIDER_GOOGLE}
onLayout={this.onMapLayout}
style={styles.containerMap}
initialRegion={{
latitude: this.props.data ? this.props.data[0].YPOINT : '',
longitude: this.props.data ? this.props.data[0].XPOINT : '',
latitudeDelta: 0.0922,
longitudeDelta: 0.0421,
}} >
{this.state.isMapReady && <Polyline
strokeWidth={2}
strokeColor="red"
coordinates={[...this.props.data.map((value, index) => { return { latitude: value.YPOINT, longitude: value.XPOINT } })]}
/>}
</MapView>
</View>
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