public function edit($id)
 {
     $withdraw = Withdraw::find($id);
     //帐户余额
     $amount = UserFinance::findOrNew($withdraw->uid)->money;
     //查找当前用户冻结金额
     $freeze_money = Bill::whereRaw("uid = ? and is_dealt = ? and created_at>='?' and event in( 'commission' , 'income')", array($withdraw->uid, 1, date("Y-m-d 00:00:00", strtotime('-7 days'))))->sum('value') ?: 0;
     //可取资金
     $usable_money = intval(($amount - $freeze_money) / ($this->site['withdraw_counter_percent'] + 1));
     $this->_user_money = compact('amount', 'freeze_money', 'usable_money');
     $withdraw = Withdraw::with(['bankcards'])->find($id);
     if (empty($withdraw)) {
         return $this->failure_noexists();
     }
     $keys = 'audit,note';
     $this->_validates = $this->getScriptValidate('withdraw.audit', $keys);
     $this->_data = $withdraw;
     return $this->view('admin.withdraw.edit');
 }