我有AngularJS ui-router,我正在检查状态更改期间的身份验证状态。在此更改过程中,我遇到了一个闪烁,因为AngularJS解决了它是否应该呈现该页面的承诺。例如,如果用户已登录,则/#/受到保护并重定向到/#/ home。但是,我看到了/#/'html的简短一瞥然后重定向发生了。如何阻止这种闪烁发生?
function authenticate($q, $state, $timeout, AuthService) {
AuthService.isLoggedIn()
.then(function () {
// Resolve the promise successfully
console.log("auth")
return $q.when()
})
.catch(function () {
$timeout(function () {
// This code runs after the authentication promise has been rejected.
// Go to the log-in page
$state.go('main')
})
// Reject the authentication promise to prevent the state from loading
return $q.reject()
})
}
function notAuthenticate($q, $state, $timeout, AuthService) {
AuthService.shouldNotBeLoggedIn()
.then(function () {
// Resolve the promise successfully
console.log("not auth")
return $q.when()
}).catch(function () {
$timeout(function () {
// This code runs after the authentication promise has been rejected.
// Go to the log-in page
$state.go('home')
})
// Reject the authentication promise to prevent the state from loading
return $q.reject()
})
}
/** @ngInject */
function routeConfig($stateProvider, $urlRouterProvider) {
$stateProvider
.state('home', {
url: '/home',
templateUrl: 'app/home/home.html',
controller: 'HomeController',
controllerAs: 'home',
resolve: {authenticate: authenticate}
})
.state('main', {
url: '/',
templateUrl: 'app/main/main.html',
controller: 'MainController',
controllerAs: 'main',
resolve: {notAuthenticate: notAuthenticate}
})
答案 0 :(得分:2)
该州的resolve
旨在“解决”问题。一些注射剂,在状态被激活之前。所以,"解决了#34; (resolve: {...}
)的属性期望一个函数返回一个值或一个值的promise。在身份验证的情况下,它可以是user
。
在您的情况下,解析函数不会return
一个承诺 - 它们只是立即运行并完成,从而激活状态。然后,稍后(短)时间,你的AuthService
开始并决定改变状态。这会导致闪烁。
function authenticate($q, $state, $timeout, AuthService) {
// this "return" is what returns the promise
return AuthService.isLoggedIn()
.then(....);
}