修复preLoad接口失效

Signed-off-by: zgf <zenggaofeng2@h-partners.com>

library/src/main/ets/components/imageknife/ImageKnife.ets

@@ -302,9 +302,58 @@ export class ImageKnife {
   preload(request: RequestOption): void {
     // 每个request 公共信息补充
     request.setFilesPath(this.filesPath);
-    return this.parseSource(request);
+    return this.loadResources(request);
   }
+  loadResources(request: RequestOption) {
+    let factories: EngineKeyInterface;
+    let cacheKey: string;
+    let transferKey: string;
+    let dataKey: string;
+    if (this.engineKeyImpl) {
+      factories = this.engineKeyImpl;
+    } else {
+      factories = new EngineKeyFactories();
+    }
+    // 生成内存缓存key 内存 变换后磁盘
 
+    let loadKey = '';
+    if (typeof request.loadSrc == 'string') {
+      loadKey = request.loadSrc;
+    } else {
+      loadKey = JSON.stringify(request.loadSrc);
+    }
+
+    let size = JSON.stringify(request.size);
+
+    let transformed = '';
+    if (request && request.transformations) {
+      for (let i = 0; i < request.transformations.length; i++) {
+        if (i == request.transformations.length - 1) {
+          transformed += request.transformations[i].getName() + "";
+        } else {
+          transformed += request.transformations[i].getName() + ",";
+        }
+      }
+    }
+
+    let dontAnimateFlag = request.dontAnimateFlag;
+
+    let signature = request.signature;
+
+    cacheKey = factories.generateMemoryCacheKey(loadKey,size,transformed,dontAnimateFlag,signature);
+
+    // 生成磁盘缓存变换后数据key 变换后数据保存在磁盘
+    transferKey = factories.generateTransformedDiskCacheKey(loadKey,size,transformed,dontAnimateFlag,signature);
+
+    // 生成磁盘缓存源数据key 原始数据保存在磁盘
+    dataKey = factories.generateOriginalDiskCacheKey(loadKey,signature);
+
+    request.generateCacheKey = cacheKey;
+    request.generateResourceKey = transferKey;
+    request.generateDataKey = dataKey;
+
+    this.loadCacheManager(request);
+  }
   // 暂停所有请求
   async pauseRequests(): Promise<void> {
     await this.mutex.lock(async () => {