删除appstorage文档重复内容

Signed-off-by: Nzhuzijia <zhuzijia@huawei.com>
Change-Id: Id44c56e39acce9d5c3a8da536c395391255b81fc

zh-cn/application-dev/quick-start/arkts-appstorage.md

@@ -297,181 +297,6 @@ export struct TapImage {
 以下示例为消息机制方式订阅事件，会导致回调监听的节点数较多，非常耗时，不推荐以此来实现应用代码。
 
 
-```ts
-// xxx.ets
-class ViewData {
-  title: string;
-  uri: Resource;
-  color: Color = Color.Black;
-
-  constructor(title: string, uri: Resource) {
-    this.title = title;
-    this.uri = uri
-  }
-}
-
-@Entry
-@Component
-struct Gallery2 {
-  dataList: Array<ViewData> = [new ViewData('flower', $r('app.media.icon')), new ViewData('OMG', $r('app.media.icon')), new ViewData('OMG', $r('app.media.icon'))]
-  scroller: Scroller = new Scroller()
-
-  build() {
-    Column() {
-      Grid(this.scroller) {
-        ForEach(this.dataList, (item: ViewData, index?: number) => {
-          GridItem() {
-            TapImage({
-              uri: item.uri,
-              index: index
-            })
-          }.aspectRatio(1)
-
-        }, (item: ViewData, index?: number) => {
-          return JSON.stringify(item) + index;
-        })
-      }.columnsTemplate('1fr 1fr')
-    }
-
-  }
-}
-
-@Component
-export struct TapImage {
-  @StorageLink('tapIndex') @Watch('onTapIndexChange') tapIndex: number = -1;
-  @State tapColor: Color = Color.Black;
-  private index: number;
-  private uri: Resource;
-
-  // 判断是否被选中
-  onTapIndexChange() {
-    if (this.tapIndex >= 0 && this.index === this.tapIndex) {
-      console.info(`tapindex: ${this.tapIndex}, index: ${this.index}, red`)
-      this.tapColor = Color.Red;
-    } else {
-      console.info(`tapindex: ${this.tapIndex}, index: ${this.index}, black`)
-      this.tapColor = Color.Black;
-    }
-  }
-
-  build() {
-    Column() {
-      Image(this.uri)
-        .objectFit(ImageFit.Cover)
-        .onClick(() => {
-          this.tapIndex = this.index;
-        })
-        .border({ width: 5, style: BorderStyle.Dotted, color: this.tapColor })
-    }
-
-  }
-}
-```
-
-### 以持久化方式订阅某个事件并接收事件回调
-
-推荐使用持久化方式订阅某个事件并接收事件回调，可以减少开销，增强代码的可读性。
-
-
-```ts
-// xxx.ets
-import emitter from '@ohos.events.emitter';
-
-let NextID: number = 0;
-
-class ViewData {
-  title: string;
-  uri: Resource;
-  color: Color = Color.Black;
-  id: number;
-
-  constructor(title: string, uri: Resource) {
-    this.title = title;
-    this.uri = uri
-    this.id = NextID++;
-  }
-}
-
-@Entry
-@Component
-struct Gallery2 {
-  dataList: Array<ViewData> = [new ViewData('flower', $r('app.media.icon')), new ViewData('OMG', $r('app.media.icon')), new ViewData('OMG', $r('app.media.icon'))]
-  scroller: Scroller = new Scroller()
-  private preIndex: number = -1
-
-  build() {
-    Column() {
-      Grid(this.scroller) {
-        ForEach(this.dataList, (item: ViewData) => {
-          GridItem() {
-            TapImage({
-              uri: item.uri,
-              index: item.id
-            })
-          }.aspectRatio(1)
-          .onClick(() => {
-            if (this.preIndex === item.id) {
-              return
-            }
-            var innerEvent = { eventId: item.id }
-            // 选中态：黑变红
-            var eventData = {
-              data: {
-                "colorTag": 1
-              }
-            }
-            emitter.emit(innerEvent, eventData)
-
-            if (this.preIndex != -1) {
-              console.info(`preIndex: ${this.preIndex}, index: ${item.id}, black`)
-              var innerEvent = { eventId: this.preIndex }
-              // 取消选中态：红变黑
-              var eventData = {
-                data: {
-                  "colorTag": 0
-                }
-              }
-              emitter.emit(innerEvent, eventData)
-            }
-            this.preIndex = item.id
-          })
-
-        }, (item: ViewData) => JSON.stringify(item))
-      }.columnsTemplate('1fr 1fr')
-    }
-
-  }
-}
-
-@Component
-export struct TapImage {
-  @State tapColor: Color = Color.Black;
-  private index: number;
-  private uri: Resource;
-
-  onTapIndexChange(colorTag: emitter.EventData) {
-    this.tapColor = colorTag.data.colorTag ? Color.Red : Color.Black
-  }
-
-  aboutToAppear() {
-    //定义事件ID
-    var innerEvent = { eventId: this.index }
-    emitter.on(innerEvent, this.onTapIndexChange.bind(this))
-  }
-
-  build() {
-    Column() {
-      Image(this.uri)
-        .objectFit(ImageFit.Cover)
-        .border({ width: 5, style: BorderStyle.Dotted, color: this.tapColor })
-    }
-  }
-}
-```
-
-以下示例为消息机制方式订阅事件，会导致回调监听的节点数较多，非常耗时，不推荐以此来实现应用代码。
-
-
 ```ts
 // xxx.ets
 class ViewData {