1.适用场景：所有通过router路由的单页应用。

2.示例代码：本文以vue-router为例。

　在router.js中：

let router = new Router({
    routes: [
        {
            path: '/',
            title: '',
            redirect: '/chooseCity'
        },
        {
            path: '/login',
            title: '',
            component: resolve => require(['components/login/login.vue'], resolve)
        },
        {
            path: '/register',
            title: '',
            component: resolve => require(['components/login/register.vue'], resolve)
        },
        {
            path: '/updatePassword',
            title: '',
            component: resolve => require(['components/login/updatePassword.vue'], resolve)
        },
        {
            path: '/home',
            title: '',
            component: resolve => require(['components/home/home.vue'], resolve)
        },
        {
            path: '/user',
            title: '',
            component: resolve => require(['components/user/user.vue'], resolve)
        },
        {
            path: '/orderList',
            title: '',
            component: resolve => require(['components/orderList/orderList.vue'], resolve)
        },
        {
            path: '/order',
            title: '',
            component: resolve => require(['components/order/order.vue'], resolve)
        },
        {
            path: '/orderDetail',
            title: '',
            component: resolve => require(['components/orderDetail/orderDetail.vue'], resolve)
        },
        {
            path: '/pay',
            title: '',
            component: resolve => require(['components/pay/pay.vue'], resolve)
        },
        {
            path: '/chooseCinema',
            title: '',
            component: resolve => require(['components/chooseCinema/chooseCinema.vue'], resolve)
        },
        {
            path: '/serviceRule',
            title: '',
            component: resolve => require(['components/serviceRule/serviceRule.vue'], resolve)
        },
        {
            path: '/chooseCity',
            title: '',
            component: resolve => require(['components/chooseCity/chooseCity.vue'], resolve)
        }
    ],
    mode: 'history',
    base: '/order/'
});
 router.afterEach((transition) => {
     // let name = transition.name;
     // let item = router.options.routes.filter((ele) => { return ele.name === name; });
     Tool.setTitle('哈哈哈哈');
 });
export default router;

3.需要用到工具Tool.setTitle:

/**
 * 设置页面标题
 */
function setTitle(title) {
  document.title = title
  var mobile = navigator.userAgent.toLowerCase();
  if (/iphone|ipad|ipod/.test(mobile)) {
    var iframe = document.createElement('iframe');
    iframe.style.display = 'none'
    var iframeCallback = function () {
      setTimeout(function () {
        iframe.removeEventListener('load', iframeCallback);
        document.body.removeChild(iframe);
      }, 0);
    }
    iframe.addEventListener('load', iframeCallback);
    document.body.appendChild(iframe);
  }
}