const map = shallowRef(null); function initMap(map) { AMapLoader.load({ key: "", // 申请好的Web端开发者Key,首次调用 load 时必填 version: "2.0", // 指定要加载的 JSAPI 的版本,缺省时默认为 1.4.15 plugins: [''], // 需要使用的的插件列表,如比例尺'AMap.Scale'等 }).then((AMap) => { map = new AMap.Map("mapContainer", { //设置地图容器id viewMode: "3D", //是否为3D地图模式 zoom: 5, //初始化地图级别 center: [105.602725, 37.076636], //初始化地图中心点位置 }); }).catch(e => { console.log(e); }) }; TS认为我未使用 const map变量
时间: 2024-02-25 10:51:27 浏览: 18
根据您提供的代码,我看到您定义了一个名为map的常量变量,但是在函数中,您将一个新的地图对象赋给map变量,这违反了常量变量的定义。因此,TypeScript认为您没有使用常量变量,因为您试图重新分配它的值。
您可以通过将map变量更改为变量来解决此问题,如下所示:
```
let map = shallowRef(null);
function initMap() {
AMapLoader.load({
key: "", // 申请好的Web端开发者Key,首次调用 load 时必填
version: "2.0", // 指定要加载的 JSAPI 的版本,缺省时默认为 1.4.15
plugins: [''], // 需要使用的的插件列表,如比例尺'AMap.Scale'等
}).then((AMap) => {
map.value = new AMap.Map("mapContainer", { //设置地图容器id
viewMode: "3D", //是否为3D地图模式
zoom: 5, //初始化地图级别
center: [105.602725, 37.076636], //初始化地图中心点位置
});
}).catch(e => {
console.log(e);
})
};
```
在这个更改后,您应该可以成功地创建一个新的地图对象,并将其分配给map变量,而不会遇到TypeScript的问题。
相关问题
https://restapi.amap.com/v3/weather/weatherInfo
https://restapi.amap.com/v3/weather/weatherInfo是一个天气查询API服务的地址。你可以使用GET请求方式调用该API,并通过parameters参数传递其他参数。其中,city参数可以在提供的城市编码表中找到对应的取值。在你的项目中,你可以使用ajax来发送请求,例如通过以下代码查询北京市的天气:
```javascript
$.ajax({
type: 'get',
url: 'https://restapi.amap.com/v3/weather/weatherInfo?key=你的key&city=110000',
contentType: "application/json",
success: function (data) {
const {weather, temperature} = data.lives\[0\]
console.log(data)
}
})
```
这段代码使用了你提供的key和city参数来查询北京市的天气信息,并将结果打印在控制台上。你可以根据需要修改key和city参数来查询其他城市的天气信息。
#### 引用[.reference_title]
- *1* [Unity 接入高德开放API - 天气查询](https://blog.csdn.net/qq_42139931/article/details/121609952)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* *3* [高德地图API--天气查询](https://blog.csdn.net/qq_38475901/article/details/121018428)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
[ .reference_list ]
private async parseMaterial(osgStateSet: any) { let material = new THREE.MeshBasicMaterial({ // side: THREE.DoubleSide, }); //THREE.FrontSide 背面 // THREE.BackSide 前面 // THREE.DoubleSide 双面 let osgImage = osgStateSet.TextureAttributeList[0].value.StateAttribute.Image; // let texture = this.parseImage(osgImage); let fileName = osgImage.Name; const isJPEG = fileName.search(/.jpe?g($|?)/i) > 0; const isPNG = fileName.search(/.png($|?)/i) > 0; if (!isPNG && !isJPEG) { return; } let mimeType = isPNG ? 'image/png' : 'image/jpeg'; let imageUri: any = new Blob([osgImage.Data], { type: mimeType }); let base64 = await this.blobToBase64(imageUri); // debugger let imageUrl: any = URL.createObjectURL(imageUri); try { let texture = new THREE.TextureLoader().load(base64, () => { texture.needsUpdate = true; // texture.format = THREE.RGBAFormat; texture.type = THREE.UnsignedShort5551Type; texture.minFilter = THREE.LinearMipmapNearestFilter; texture.magFilter = THREE.LinearMipmapNearestFilter; texture.generateMipmaps = false; // texture.format = THREE.RGBAIntegerFormat; // texture.minFilter = THREE.NearestFilter; // texture.magFilter = THREE.NearestFilter; // texture.minFilter = THREE.LinearMipMapLinearFilter; // texture.magFilter = THREE.LinearFilter; // texture.wrapS = THREE.RepeatWrapping; // texture.wrapT = THREE.RepeatWrapping; // texture.anisotropy = 1; // texture.generateMipmaps = false; // texture.encoding = THREE.sRGBEncoding; }); imageUri = null; osgImage = null; imageUrl = null; if (texture) { material.map = texture; } } catch (e) { console.log('纹理加载出错', e); } osgStateSet = null; return material; } private blobToBase64(blob: any) { return new Promise((resolve, reject) => { const fileReader = new FileReader(); // readAsDataURL fileReader.readAsDataURL(blob); fileReader.onload = (e: any) => { resolve(e.target.result); }; }); }没有显示base64图片的纹理,也没有报错,请找出问题,并给出详细代码
在代码中,你使用了一个Blob对象来加载纹理图片,并将其转换成了base64编码,但是在加载纹理时,却直接使用了base64编码字符串来加载纹理,这个可能是导致问题的原因。正确的做法应该是使用图片的URL来加载纹理,而不是直接使用base64编码字符串。
具体修改代码如下:
```typescript
private async parseMaterial(osgStateSet: any) {
let material = new THREE.MeshBasicMaterial({
// side: THREE.DoubleSide,
});
//THREE.FrontSide 背面
// THREE.BackSide 前面
// THREE.DoubleSide 双面
let osgImage = osgStateSet.TextureAttributeList[0].value.StateAttribute.Image;
// let texture = this.parseImage(osgImage);
let fileName = osgImage.Name;
const isJPEG = fileName.search(/.jpe?g($|?)/i) > 0;
const isPNG = fileName.search(/.png($|?)/i) > 0;
if (!isPNG && !isJPEG) {
return;
}
let mimeType = isPNG ? 'image/png' : 'image/jpeg';
let imageUri: any = new Blob([osgImage.Data], { type: mimeType });
try {
// 使用图片的URL来加载纹理
let texture = await new Promise<THREE.Texture>((resolve) => {
let imageUrl = URL.createObjectURL(imageUri);
new THREE.TextureLoader().load(imageUrl, (texture) => {
// 在加载完成的回调函数中,手动释放URL对象,避免内存泄漏问题
URL.revokeObjectURL(imageUrl);
texture.needsUpdate = true;
// texture.format = THREE.RGBAFormat;
texture.type = THREE.UnsignedShort5551Type;
texture.minFilter = THREE.LinearMipmapNearestFilter;
texture.magFilter = THREE.LinearMipmapNearestFilter;
texture.generateMipmaps = false;
// texture.format = THREE.RGBAIntegerFormat;
// texture.minFilter = THREE.NearestFilter;
// texture.magFilter = THREE.NearestFilter;
// texture.minFilter = THREE.LinearMipMapLinearFilter;
// texture.magFilter = THREE.LinearFilter;
// texture.wrapS = THREE.RepeatWrapping;
// texture.wrapT = THREE.RepeatWrapping;
// texture.anisotropy = 1;
// texture.generateMipmaps = false;
// texture.encoding = THREE.sRGBEncoding;
resolve(texture);
});
});
if (texture) {
material.map = texture;
}
} catch (e) {
console.log('纹理加载出错', e);
}
osgStateSet = null;
return material;
}
private blobToBase64(blob: any) {
return new Promise((resolve, reject) => {
const fileReader = new FileReader();
// readAsDataURL
fileReader.readAsDataURL(blob);
fileReader.onload = (e: any) => {
resolve(e.target.result);
};
});
}
```
其中,使用了一个Promise对象来等待纹理加载完成后返回,同时在加载完成的回调函数中,手动释放URL对象,避免内存泄漏问题。另外,建议在加载纹理时,设置合适的minFilter和magFilter,以获得更好的渲染效果。