feat(Stepper): add disable-long-press feature (#2691)

* feat(Stepper): add disable-long-press feature

* feat(Stepper):  name the same as Vant

example/pages/stepper/index.wxml

@@ -18,6 +18,10 @@
   <van-stepper value="{{ 1 }}" disabled />
 </van-cell>
 
+<van-cell center title="禁用长按">
+  <van-stepper value="{{ 1 }}" long-press="{{ false }}" />
+</van-cell>
+
 <van-cell center title="固定小数位数">
   <van-stepper value="{{ 1 }}" step="0.2" decimal-length="{{ 1 }}" />
 </van-cell>

packages/stepper/README.md

@@ -64,6 +64,14 @@ Page({
 <van-stepper value="{{ 1 }}" disabled />
 ```
 
+### 关闭长按
+
+通过设置`long-press`属性决定步进器是否开启长按手势
+
+```html
+<van-stepper value="{{ 1 }}" long-press="{{ false }}" />
+```
+
 ### 固定小数位数
 
 通过设置`decimal-length`属性可以保留固定的小数位数
@@ -127,6 +135,7 @@ Page({
 | decimal-length | 固定显示的小数位数 | *number* | - | - |
 | disable-plus | 是否禁用增加按钮 | *boolean* | - | - |
 | disable-minus | 是否禁用减少按钮 | *boolean* | - | - |
+| long-press | 是否开启长按手势 | *boolean* | `true` | - |
 
 ### Events
 

packages/stepper/index.ts

@@ -77,7 +77,11 @@ VantComponent({
       value: true
     },
     disablePlus: Boolean,
-    disableMinus: Boolean
+    disableMinus: Boolean,
+    longPress: {
+      type: Boolean,
+      value: true
+    },
   },
 
   data: {
@@ -160,6 +164,9 @@ VantComponent({
     },
 
     onTouchStart(event: Weapp.Event) {
+      if (!this.data.longPress) {
+        return;
+      }
       clearTimeout(this.longPressTimer);
 
       const { type } = event.currentTarget.dataset;
@@ -174,6 +181,9 @@ VantComponent({
     },
 
     onTouchEnd() {
+      if (!this.data.longPress) {
+        return;
+      }
       clearTimeout(this.longPressTimer);
     },