fix: 修复自定义弹窗控制footer时的逻辑错误，改为默认显示保存和取消，增加custom-footer插槽来自定义footer，以使其更加灵活

src/components/CustomModal/index.vue

@@ -1,10 +1,5 @@
 <template>
-  <a-modal
-    :class="'custom-modal' + (innerFullscreen ? ' fullscreen' : '')"
-    v-bind="_attrs"
-    v-model="visible"
-    :footer="null"
-  >
+  <a-modal :class="'custom-modal' + (innerFullscreen ? ' fullscreen' : '')" v-bind="_attrs" v-model="visible">
     <img slot="closeIcon" src="@/assets/images/global/close.png" />
     <div slot="title">
       <div class="custom-modal-title">
@@ -16,10 +11,13 @@
       </div>
     </div>
     <slot></slot>
-    <a-space v-if="showFooter" class="operators" :size="20">
-      <a-button type="success" @click="onSave" :loading="confirmLoading">Save</a-button>
-      <a-button type="warn" @click="onCancel">Cancel</a-button>
-    </a-space>
+    <template slot="footer">
+      <slot name="custom-footer"></slot>
+      <a-space v-if="!hasCustomFooter" class="operators" :size="20">
+        <a-button type="success" @click="onSave" :loading="confirmLoading">Save</a-button>
+        <a-button type="warn" @click="onCancel">Cancel</a-button>
+      </a-space>
+    </template>
   </a-modal>
 </template>
 <script>
@@ -34,10 +32,6 @@ export default {
     title: {
       type: String
     },
-    showFooter: {
-      type: Boolean,
-      default: true
-    },
     enableFullScreen: {
       type: Boolean,
       default: false
@@ -92,6 +86,11 @@ export default {
         attrs['width'] = '100%'
       }
       return attrs
+    },
+
+    // 是否有自定义的footer
+    hasCustomFooter() {
+      return !!this.$slots['custom-footer']
     }
   }
 }