aboutToRecycle生命周期将请求生命周期销毁

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

library/src/main/ets/components/ImageKnifeComponent.ets

@@ -63,7 +63,12 @@ export struct ImageKnifeComponent {
     }
     this.listener.off("layout", this.onLayoutComplete)
   }
-
+  aboutToRecycle(){
+    if (this.request !== undefined) {
+      this.request.requestState = ImageKnifeRequestState.DESTROY
+      this.request = undefined
+    }
+  }
   build() {
     Image(this.pixelMap)
       .objectFit(this.ImageKnifeOption.objectFit === undefined ? ImageFit.Contain : this.ImageKnifeOption.objectFit)