我尝试使用flutter放大地图中的两个标记,但是在flit fitBounds中找不到方法。
getRouteCoordinates(_initialPosition, destination);
*LatLngBounds bound = LatLngBounds(northeast: initialPosition,southwest: destination);
//mapController.getVisibleRegion();
CameraUpdate u2 = CameraUpdate.newLatLngBounds(bound, 10);
this.mapController.animateCamera(u2).then((void v){
check(u2,this.mapController);
});
void check(CameraUpdate u, GoogleMapController c) async {
c.animateCamera(u);
mapController.animateCamera(u);
LatLngBounds l1=await c.getVisibleRegion();
LatLngBounds l2=await c.getVisibleRegion();
print(l1.toString());
print(l2.toString());
if(l1.southwest.latitude==-90 ||l2.southwest.latitude==-90)
check(u, c);
}
答案 0 :(得分:1)
首先,从您的GeoPoint中创建一个列表,并创建一个函数来选择边界点。
LatLngBounds boundsFromLatLngList(List<LatLng> list) {
assert(list.isNotEmpty);
double x0, x1, y0, y1;
for (LatLng latLng in list) {
if (x0 == null) {
x0 = x1 = latLng.latitude;
y0 = y1 = latLng.longitude;
} else {
if (latLng.latitude > x1) x1 = latLng.latitude;
if (latLng.latitude < x0) x0 = latLng.latitude;
if (latLng.longitude > y1) y1 = latLng.longitude;
if (latLng.longitude < y0) y0 = latLng.longitude;
}
}
return LatLngBounds(northeast: LatLng(x1, y1), southwest: LatLng(x0, y0));
}
之后调用此功能并进行缩放
LatLngBounds bound = boundsFromLatLngList(listmap);
await Future.delayed(Duration(milliseconds:500)).then((v) async {
CameraUpdate u2 = CameraUpdate.newLatLngBounds(bound, 50);
this.mapController.animateCamera(u2).then((void v) {
check(u2, this.mapController);
});
});
此代码段对我有用