微信点击返回键自动重新加载

function isIos() {//判断是IOS还是Android
                    var userAgent = navigator.userAgent;
                    var isAndroid = userAgent.indexOf('Android') > -1 || userAgent.indexOf('Adr') > -1; //android终端
                    var isiOS = !!userAgent.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/); //ios终端
                    if (isAndroid) {
                        return false;
                    } else if (isiOS) {
                        return true;
                    }
                }
                if (isIos()) {
                        var isPageHide = false;
                        window.addEventListener('pageshow', function () {
                            if (isPageHide) {
                                window.location.reload();
                            
                            }
                        });
                        window.addEventListener('pagehide', function () {
                            isPageHide = true;
                        });
                    } else {
                        var needRefresh = sessionStorage.getItem("need-refresh");
                        if (needRefresh) {
                            sessionStorage.removeItem("need-refresh");
                            window.location.reload();
                        
                        }
                }