rasterRenderers

一个方便的模块，用于导入渲染器类，在使用TypeScript开发时可以用来渲染ImageryLayer。例如，而不是像这样一次导入一个渲染器

import ClassBreaksRenderer = require("esri/renderers/ClassBreaksRenderer");
import UniqueValueRenderer = require("esri/renderers/UniqueValueRenderer");
import RasterStretchRenderer = require("esri/renderers/RasterStretchRenderer");
import RasterColormapRenderer = require("esri/renderers/RasterColormapRenderer");
import RasterShadedReliefRenderer = require("esri/renderers/RasterShadedReliefRenderer");

您可以使用此模块在单行上导入它们

import { ClassBreaksRenderer, UniqueValueRenderer, RasterColormapRenderer, RasterStretchRenderer, RasterShadedReliefRenderer } from "esri/rasterRenderers";

此模块还允许您在呈现器上实现类型保护，使代码更加智能。

import { Renderer } from "esri/rasterRenderers";

function logRenderer(renderer: RasterStretchRenderer): void {
 if (renderer.type == "raster-stretch") {
   // 编译器知道渲染器必须是RasterStretchRenderer
   console.log("renderer color ramp: ", renderer.colorRamp);
 }
}

类型定义

• ClassBreaksRenderer
• RasterColormapRenderer
• RasterShadedReliefRenderer
• RasterStretchRenderer
• UniqueValueRenderer
• VectorFieldRenderer