微信JSAPI支付接口，支付完成后关闭当前窗口

一、把demo里的这一段：

success: function (res) {
// 支付成功后的回调函数
if (res.err_msg == "get_brand_wcpay_request:ok") {
alert("微信支付成功!");
} else if (res.err_msg == "get_brand_wcpay_request:cancel") {
alert("用户取消支付!");
} else {
WeixinJSBridge.log(res.err_msg);
alert(res.err_code + res.err_desc + res.err_msg);
// alert(res.err_msg);
// alert("支付失败!");
}

}

改成：

success: function (res) {
// 支付成功后的回调函数
if (res.errMsg == "chooseWXPay:ok") {

WeixinJSBridge.call('closeWindow');
} else if (res.errMsg == "chooseWXPay:cancel") {

WeixinJSBridge.call('closeWindow');
} else {
WeixinJSBridge.log(res.errMsg);
}
}

注意两点：

（1）需要调用WeixinJSBridge.call('closeWindow');才能关闭当前窗口，而不是window.close()

（2）res.err_msg要改成res.errMsg

二、把demo里的这一段：

function callpay()
               {
                   
                   if (typeof (WeixinJSBridge) == "undefined")
                   {
                       if (document.addEventListener)
                       {
                           alert('添加监听1')
                           document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);
                       }
                       else if (document.attachEvent)
                       {
                           alert('添加监听2')
                           document.attachEvent('WeixinJSBridgeReady', jsApiCall);
                           document.attachEvent('onWeixinJSBridgeReady', jsApiCall);
                       }
                   }
                   else
                   {
                       jsApiCall();
                   }
               }

改成：

function callpay()
               {
                   if (typeof (WeixinJSBridge) == "undefined")
                   {
                       if (document.addEventListener)
                       {
                           alert('添加监听1')
                           document.addEventListener('WeixinJSBridgeReady', function () {
                               jsApiCall();
                           }, false);

                       }
                       else if (document.attachEvent)
                       {
                           alert('添加监听2')
                           document.attachEvent('WeixinJSBridgeReady', function () {
                               jsApiCall();
                           });
                           document.attachEvent('onWeixinJSBridgeReady', function () {
                               jsApiCall();
                           });
                       }
                   }
                   else
                   {
                       jsApiCall();
                   } 
               }

最主要就是把jsApiCall()用function包裹起来，要不然执行不到jsApiCall的回调函数，这个跟微信支付的异步回调有关系。