[英]Parent controller instantiated each time a child view is called
我正在使用ui-router,我有一個配置,其中我使用的父視圖有一個控制器和子視圖,它也有自己的控制器。 每次導航到其中一個子視圖時,父控制器都會再次實例化,因此會對服務器執行不必要的請求。 我希望能夠在子狀態之間導航並重用由父控制器解析的變量。
如何防止每次實例化父控制器?
這是我的路由配置:
$stateProvider
.state('researchLayoutEditor', {
url: '/research/:researchId/layoutEditor/:orderInGroup',
controller: 'layoutEditorController',
controllerAs: 'layoutEditorCtrl',
templateUrl: 'app/researchManagement/researchLayoutEditor/layoutEditor.html',
redirectTo: 'researchLayoutEditor.slide',
params: {
group: 'A',
orderInGroup: '0'
},
resolve: {
researchLayout: function (researchesService, $stateParams) {
return researchesService.getResearchLayout($stateParams.researchId, false);
},
research: function (researchesService, $stateParams) {
return researchesService.getResearch($stateParams.researchId);
}
}
}).state('researchLayoutEditor.slide', {
url: '/textual',
templateUrl: 'app/researchManagement/researchLayoutEditor/textSlide.html',
controller: 'textSlideController',
controllerAs: 'txtSlide'
}).state('researchLayoutEditor.movie', {
url: '/video',
templateUrl: 'app/researchManagement/researchLayoutEditor/movieSlide.html',
controller: 'movieSlideController',
controllerAs: 'movieSlide',
resolve: {
movieCategories: function (utilsService) {
return utilsService.getVideoCategories();
}
}
}).state('researchLayoutEditor.memory', {
url: '/memory',
templateUrl: 'app/researchManagement/researchLayoutEditor/memorySlide.html',
controller: 'memorySlideController',
controllerAs: 'memorySlide'
}).state('researchLayoutEditor.question', {
url: '/question',
templateUrl: 'app/researchManagement/researchLayoutEditor/questionSlide.html',
controller: 'questionSlideController',
controllerAs: 'questionSlide'
});
這是HTML:
<div id="mainContent">
<!-- our nested state views will be injected here -->
<div ui-view class="inner-content"></div>
</div>
嘗試使用父狀態作為抽象,這是一個plnkr
示例檢查出來
好吧,在通過消除嘗試最有用的調試方法之后,我發現問題就是我構建URL的方式。 在我的父狀態中,我有如下定義的URL:
url: '/research/:researchId/layoutEditor/:orderInGroup',
當orderInGroup參數在每次單擊子狀態時更改。 所以最終的URL看起來像這樣:
... /#/科研/ 37 / layoutEditor / 1 /視頻
顯然,在更改“orderInGroup”參數的位置並將其放到URL的末尾之后
... /#/科研/ 37 / layoutEditor /視頻/ 1
並移動
params: {
group: 'A',
orderInGroup: '0'
}
同樣反對孩子的狀態,問題得到了解決。 所以最終工作的URL配置看起來像這樣(我將/:orderInGroup移動到子狀態):
$stateProvider
.state('researchLayoutEditor', {
url: '/research/:researchId/layoutEditor',
controller: 'layoutEditorController',
controllerAs: 'layoutEditorCtrl',
templateUrl: 'app/researchManagement/researchLayoutEditor/layoutEditor.html',
redirectTo: 'researchLayoutEditor.slide'
})
.state('researchLayoutEditor.movie', {
url: '/video/:orderInGroup',
templateUrl: 'app/researchManagement/researchLayoutEditor/movieSlide.html',
controller: 'movieSlideController',
controllerAs: 'movieSlide',
params: {
group: 'A',
orderInGroup: '0'
}
})
.state('researchLayoutEditor.slide', {
url: '/textual/:orderInGroup',
templateUrl: 'app/researchManagement/researchLayoutEditor/textSlide.html',
controller: 'textSlideController',
controllerAs: 'txtSlide',
params: {
group: 'A',
orderInGroup: '0'
}
});
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