上传图片统计错误

@@ -223,6 +223,11 @@ $refundTable.on('change', '.refund-reason', function() {
     upload.up({
         callback: function(result) {
             if (result && result.code === 200) {
+                // 避免异步上传导致数量不统一
+                num = $this.data('num') || 0;
+                if (num > 3) {
+                    return;
+                }
                 $this.siblings('.img-up-tip').text(++num + '/4');
                 $this.data('num', num);
                 $this.before(imgFn(result));