代码优化

@@ -7,14 +7,21 @@ import { CompUtils } from '../../utils/CompUtils';
 @Component
 export struct HeadPictureCardComponent {
   @State compDTO: CompDTO = {} as CompDTO
+  private  item: ContentDTO
+
+  aboutToAppear() {
+
+    // Data Initialization.
+    this.item = this.compDTO.operDataList[0];
+  }
 
   build() {
     Stack() {
-      Image(this.compDTO.operDataList[0].coverUrl)
+      Image(this.item.coverUrl)
         .width(CommonConstants.FULL_WIDTH)
         .height(CommonConstants.FULL_HEIGHT)
 
-      if (this.compDTO.operDataList[0].newsTitle != null) {
+      if (this.item.newsTitle != null) {
         Row()
           .width(CommonConstants.FULL_WIDTH)
           .height(59)
@@ -24,7 +31,7 @@ export struct HeadPictureCardComponent {
             ]
           })
         Row() {
-          Text(this.compDTO.operDataList[0].newsTitle)
+          Text(this.item.newsTitle)
             .width(CommonConstants.FULL_WIDTH)
             .height(CommonConstants.FULL_HEIGHT)
             .fontColor(Color.White)
@@ -39,7 +46,7 @@ export struct HeadPictureCardComponent {
     }
     .alignContent(Alignment.Bottom)
     .width(CommonConstants.FULL_WIDTH)
-    .aspectRatio(imageSizeRatio(this.compDTO.operDataList[0].coverSize))
+    .aspectRatio(imageSizeRatio(this.item.coverSize))
     .height(200)
   }
 }