edit

app/mshop/src/Buy.php

@@ -105,10 +105,10 @@ class Buy extends Core
                     $this->data['method']['type'] = 1;
                     #花的钱
                     $this->data['method']['price'] = $this->data['price'];
-                    $this->data['price'] = $this->shop['price'] - $this->data['price'];
+                    $this->data['price'] = 0;
                     #余额
-                    $this->data['method']['yue'] = $this->data['price'];
-                }elseif($this->shop['price'] < $this->data['price']){
+                    $this->data['method']['yue'] = $this->shop['price'] - $this->data['price']
+                }else {
                     $this->data['method']['type'] = 2;
                     $this->data['method']['price'] = $this->shop['price'];
                     $this->data['price'] = $this->data['price'] - $this->shop['price'];