购物车0元删除

src/views/cart/index.tsx

@@ -267,7 +267,7 @@ export default defineComponent({
                   <SubmitBar
                     buttonText="删除"
                     buttonColor="var(--van-primary)"
-                    disabled={this.totalPrice === 0}
+                    disabled={this.len === 0}
                     onSubmit={() => this.onDeleteCartItem()}
                   >
                     <Checkbox