修改TextPicker示例

Signed-off-by: Nsunjiakun <sunjiakun3@huawei.com>

zh-cn/application-dev/reference/arkui-ts/ts-basic-components-textpicker.md

@@ -71,17 +71,48 @@ TextPicker(options?: {range: string[] | string[][] | Resource | TextPickerRangeC
 @Component
 struct TextPickerExample {
   private select: number = 1
-  private fruits: string[] = ['apple1', 'orange2', 'peach3', 'grape4']
+  private apfruits: string[] = ['apple1', 'apple2', 'apple3', 'apple4']
+  private orfruits: string[] = ['orange1', 'orange2', 'orange3', 'orange4']
+  private pefruits: string[] = ['peach1', 'peach2', 'peach3', 'peach4']
+  private multi: string[][] = [this.apfruits, this.orfruits, this.pefruits]
+  private cascade: TextCascadePickerRangeContent[] = [
+    {
+      text: '辽宁省',
+      children: [{ text: '沈阳市', children: [{ text: '沈河区' }, { text: '和平区' }, { text: '浑南区' }] },
+        { text: '大连市', children: [{ text: '中山区' }, { text: '金州区' }, { text: '长海县' }] }]
+    },
+    {
+      text: '吉林省',
+      children: [{ text: '长春市', children: [{ text: '南关区' }, { text: '宽城区' }, { text: '朝阳区' }] },
+        { text: '四平市', children: [{ text: '铁西区' }, { text: '铁东区' }, { text: '梨树县' }] }]
+    },
+    {
+      text: '黑龙江省',
+      children: [{ text: '哈尔滨市', children: [{ text: '道里区' }, { text: '道外区' }, { text: '南岗区' }] },
+        { text: '牡丹江市', children: [{ text: '东安区' }, { text: '西安区' }, { text: '爱民区' }] }]
+    }
+  ]
 
   build() {
     Column() {
-      TextPicker({ range: this.fruits, selected: this.select })
+
+      TextPicker({ range: this.apfruits, selected: this.select })
         .onChange((value: string, index: number) => {
           console.info('Picker item changed, value: ' + value + ', index: ' + index)
+        }).margin({ bottom: 50 })
+
+      TextPicker({ range: this.multi })
+        .onChange((value: string | string[], index: number | number[]) => {
+          console.info('TextPicker 多列:onChange ' + JSON.stringify(value) + ', ' + 'index: ' + JSON.stringify(index))
+        }).margin({ bottom: 50 })
+
+      TextPicker({ range: this.cascade })
+        .onChange((value: string | string[], index: number | number[]) => {
+          console.info('TextPicker 多列联动:onChange ' + JSON.stringify(value) + ', ' + 'index: ' + JSON.stringify(index))
         })
     }
   }
 }
 ```
 
-![zh-cn_image_0000001219662657](figures/zh-cn_image_0000001219662657.png)
+![textpicker](figures/textpicker.gif)