Wechat payment iframe sub page has no response

Parent page signature    For sub pages parent Call the parent page payment interface .

    parent.wx.config({
                    debug: false, // Turn on debugging mode , Call all api The return value of will be on the client side alert come out , To see the parameters passed in , Can be in pc End open , The parameter information will go through log play , Only in pc Only when the end is printed .
                    appId: appId, // Required , The only sign of official account number
                    timestamp: timeStamp, // Required , Generate signature timestamp
                    nonceStr: nonceStr, // Required , Generate a random string of signatures
                    signature: signature,// Required , Signature , See appendix 1
                    jsApiList: ['chooseWXPay']  // Required , Required JS Interface list , all JS See Appendix... For the list of interfaces 2
                     
                });
                parent.wx.error(function(res){
                     console.log(res);
                 });
                parent.wx.ready(function(){
                     callPay();
                 });