升级typescript后，校验错误修复

src/components/app-picker/app-picker.vue

@@ -268,7 +268,7 @@ export default class AppPicker extends Vue {
      * @type {string}
      * @memberof AppPicker
      */
-    public selectValue = this.value;
+    public selectValue = null;
 
     /**
      * 下拉列表节点元素
@@ -301,6 +301,7 @@ export default class AppPicker extends Vue {
     @Watch('value',{immediate:true})
     public onValueChange(newVal: any, oldVal: any) {
         this.curvalue = newVal;
+		this.selectValue = newVal;
         if (Object.is(this.editortype, 'dropdown') && this.valueitem) {
             const value = this.data[this.valueitem];
             const index = this.items.findIndex((item: any) => Object.is(item.value, value));
@@ -431,7 +432,6 @@ export default class AppPicker extends Vue {
      * @param item 
      */
     public onACSelect(item: any): void {
-        this.selectValue = item[this.deMajorField];
         if (this.valueitem) {
             this.$emit('formitemvaluechange', { name: this.valueitem, value: item[this.deKeyField] });
         }