uview-plus组件库全面升级更新，订单结算判断支付方式是否可用代码调整，公众号关注二维码修改

uni_modules/uview-plus/components/u-tree/tree-node.vue

@@ -0,0 +1,128 @@
+<template>
+  <view class="u-tree-node" :style="{ paddingLeft: depth * 20 + 'px' }">
+    <view class="u-tree-node-content" @click="toggle">
+      <!-- <text v-if="hasChildren" class="u-tree-node-toggle">
+        {{ node.expanded ? '▼' : '▶' }}
+      </text> -->
+      <up-icon v-if="hasChildren" class="u-tree-node-toggle"
+       :name="node.expanded ? 'arrow-down-fill' : 'play-right-fill'" size="12" />
+      <up-checkbox
+        v-if="showCheckbox"
+        usedAlone
+        :size="12"
+        :checked="node.checked"
+        @change="toggleCheck"
+        style="margin-right: 10px;"
+      />
+      <slot :nodeData="node" :level="depth + 1">
+        {{ node[props.label] }}
+      </slot>
+    </view>
+    <view v-if="hasChildren && (node.expanded === undefined ? true : node.expanded)"
+      class="u-tree-node-children"
+      :style="{ paddingLeft: (depth + 1) * 20 + 'px' }">
+      <tree-node
+        v-for="child in node[props.children]"
+        :key="child[props.nodeKey]"
+        :node="child"
+        :props="props"
+        :show-checkbox="showCheckbox"
+        :check-strictly="checkStrictly"
+        :expand-on-click-node="expandOnClickNode"
+        :depth="depth + 1"
+        @node-click="$emit('node-click', $event)"
+        @check-change="$emit('check-change', $event)">
+        <template #default="{ nodeData, level }">
+            <slot name="default" :nodeData="nodeData" :level="level"></slot>
+        </template>
+      </tree-node>
+    </view>
+  </view>
+</template>
+
+<script>
+export default {
+  name: 'tree-node',
+  props: {
+    node: {
+      type: Object,
+      required: true
+    },
+    props: {
+      type: Object,
+      required: true
+    },
+    showCheckbox: {
+      type: Boolean,
+      default: false
+    },
+    checkStrictly: {
+      type: Boolean,
+      default: false
+    },
+    expandOnClickNode: {
+      type: Boolean,
+      default: true
+    },
+    depth: {
+        type: Number,
+        default: 0
+    }
+  },
+  computed: {
+    hasChildren() {
+      return this.node[this.props.children] && this.node[this.props.children].length > 0;
+    },
+    isExpanded() {
+        return this.node.expanded === undefined ? false : this.node.expanded;
+    }
+  },
+  emits: ['node-click', 'check-change'],
+  methods: {
+    toggle() {
+      if (this.expandOnClickNode && this.hasChildren) {
+        this.node.expanded = !this.node.expanded;
+      }
+      this.$emit('node-click', this.node);
+    },
+    toggleCheck(checked) {
+      this.node.checked = checked;
+      if (!this.checkStrictly) {
+        this.updateChildCheckStatus(this.node, checked);
+        this.updateParentCheckStatus(this.node);
+      }
+      this.$emit('check-change', this.node);
+    },
+    updateChildCheckStatus(node, checked) {
+      if (node[this.props.children]) {
+        node[this.props.children].forEach(child => {
+          child.checked = checked;
+          this.updateChildCheckStatus(child, checked);
+        });
+      }
+    },
+    updateParentCheckStatus(node) {
+      let parent = this.$parent;
+      while (parent && parent.node) {
+        const allChecked = parent.node[this.props.children].every(
+          child => child.checked
+        );
+        parent.node.checked = allChecked;
+        parent = parent.$parent;
+      }
+    }
+  }
+};
+</script>
+
+<style scoped>
+.u-tree-node-content {
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  padding-left: 20px;
+}
+.u-tree-node-toggle {
+  margin-right: 5px;
+}
+</style>