在React-native我正在使用react-native-maps开发示例应用程序,它运行正常但我没有找到如何将CurrentMap从CurrentLocation显示到另一个地址或位置:
这是我的代码:
<MapView
ref='map'
style={styles.map}
region={this.state.mapRegion}
showsUserLocation={true}
followUserLocation={true}
zoomEnabled={true}
pitchEnabled={true}
showsCompass={true}
showsBuildings={true}
showsTraffic={true}
showsIndoors={true}
onRegionChange={this.onRegionChange.bind(this)}
onPress={this.onMapPress.bind(this)}>
{this.state.markers.map(marker => (
<MapView.Marker
coordinate={{
latitude: marker.Latitude||this.state.lastLat||region.latitude,
longitude:marker.Longitude||this.state.lastLong||region.longitude
}}
image = {
marker.EmergencyService == true ?(
require('./Imgs/emergencyService.png')):
(require('./Imgs/regularService.png'))
}
onCalloutPress={() => this.bookDoctorsAppointment(marker)}
>
<MyCustomMarkerView marker={marker} navigator={this.props.navigator}/>
</MapView.Marker>
))}
</MapView>
实际上在本规范中,我显示了一些标记列表但是我不需要所有标记路线图....我只想要特定标记中的一个到当前位置。
答案 0 :(得分:1)
您需要查询:“https://maps.googleapis.com/maps/api/directions/” 基本上你必须给出原点和目的地坐标。 更多信息:
您应该解析的答案:
export function decode (t, e) {
for (var n, o, u = 0, l = 0, r = 0, d = [], h = 0, i = 0, a = null, c
= Math.pow(10, e || 5); u < t.length;) {
a = null, h = 0, i = 0
do a = t.charCodeAt(u++) - 63, i |= (31 & a) << h, h += 5; while (a
>= 32)
n = 1 & i ? ~(i >> 1) : i >> 1, h = i = 0
do a = t.charCodeAt(u++) - 63, i |= (31 & a) << h, h += 5; while (a
>= 32)
o = 1 & i ? ~(i >> 1) : i >> 1, l += n, r += o, d.push([l / c, r /
c])
}
return d.map(function (t) { return {latitude: t[0], longitude: t[1]}
})
}
//此功能是从https://github.com/airbnb/react-native-maps/issues/929
中选择的响应,我存储状态:
that.setState({
route: [decode(res)]
})
renderRoute (coordinates, i) {
return (
<MapView.Polyline
key={i}
coordinates={coordinates}
strokeColor={......}
strokeWidth={4}
/>
);
}
render () {
return (
<MapView
showsUserLocation
followsUserLocation
loadingEnabled
>
{this.state.route.map(this.renderRoute)}
</MapView>
因此,每次更新状态时,都会自动更新您的路线。 如果您需要更多帮助,请随意提出更多问题