Angular 从模板调用方法不需要';t工作(角度5)
有一种Angular的功能,我敢肯定几乎每个开发人员有时都会用到,而且通常工作得很完美:从模板调用方法。我已经做了几个月了,到目前为止我还没有遇到任何问题 直到现在 我有一个菜单组件,它从数据库动态加载菜单项,并在可视化组件中绘制它们。每个端点都有一个routeLink,用于遍历视图。这是完美的工作,没有任何问题 问题是,现在我想以某种方式保留这些RouteLink(“a”元素)处于选中状态,因此菜单还告诉用户他当前在哪个视图中。我的方法是,如果选择了“a”元素,则将其设置为橙色,如果未选择,则将其设置为灰色。因此,我将检查最新类别和最终端点,以获得一个布尔值,以确定“a”元素文本必须是橙色还是灰色 这是模板尾端,嵌入在两个NGFOR中,可遍历类别和子类别:Angular 从模板调用方法不需要';t工作(角度5),angular,Angular,有一种Angular的功能,我敢肯定几乎每个开发人员有时都会用到,而且通常工作得很完美:从模板调用方法。我已经做了几个月了,到目前为止我还没有遇到任何问题 直到现在 我有一个菜单组件,它从数据库动态加载菜单项,并在可视化组件中绘制它们。每个端点都有一个routeLink,用于遍历视图。这是完美的工作,没有任何问题 问题是,现在我想以某种方式保留这些RouteLink(“a”元素)处于选中状态,因此菜单还告诉用户他当前在哪个视图中。我的方法是,如果选择了“a”元素,则将其设置为橙色,如果未选择,则
<a [routerLink]="thirdLevel.url"
[style.color]="checkSelectedUrl(subcategory.key, thirdLevel.key) ? 'orange' : 'gray'"
class="menu-third-level lvl2"
[routerLinkActive]="active-route"
[style.marginTop]="isFirst ? '-20px' : '0px'">
{{ thirdLevel?.title?.toUpperCase() }} </a>
正如您所看到的,它有一些控制台来检查它是否工作正常并且它们从未显示。这个方法从未执行过,好像模板因为某种原因无法调用它,可能是因为routeLink,但我完全不知道
为什么模板不能调用此方法?我如何解决这个问题
谢谢大家!
编辑:这是整个模板:
<div class="menu-container">
<div class="row header">
<img class="logo" src="../../../assets/menu-header.PNG">
<div class="row top-right-buttons" *ngIf="menuData">
<div class="col-md-3 top-menu-item" (click)="topMenuActivity('runs', runsmodal)">
<i class="fa fa-calendar top-icon"></i>
<span class="top-menu-text">RUNS</span>
</div>
<div class="col-md-3 top-menu-item" (click)="topMenuActivity('op-service', servicemodal)">
<i class="fa fa-envelope-o top-icon"></i>
<span class="top-menu-text">SERVICE</span>
</div>
<div class="col-md-3 top-menu-item" (click)="topMenuActivity('user', usermodal)">
<i class="fa fa-user top-icon"></i>
<span class="top-menu-text">USER</span>
</div>
<div class="col-md-3 top-menu-item" (click)="topMenuActivity('logout', null)">
<i class="fa fa-power-off"></i>
<span class="top-menu-text">LOGOUT</span>
</div>
</div>
</div>
<div class="row menu-btn">
<div class="ext-menu-btn" (click)="openMenu()" *ngIf="menuData">
<span class="menu-span" [@menuStringAnim]="active">MENU</span>
<i class="fa fa-bars menu-icon" [@menuIconAnim]="active"></i>
</div>
</div>
</div>
<div class="menu-list" [@menuListAnim]="active" *ngIf="menuData">
<div class="inner-menu-btn" (click)="openMenu()">
<span class="menu-span-inner" style="left: 35px">MENU</span>
<i class="fa fa-arrow-left menu-close-btn"></i>
</div>
<div class="row row-fix " *ngFor="let category of getCategories()">
<div class="little-menu-bar-toplvl" *ngIf="categoriesNavigator.lvl0 == category.key">
</div>
<p class="menu-top-level lvl0" (click)="openCategory(category)">{{ category?.title?.toUpperCase() }} </p>
<div *ngIf="categoriesNavigator.lvl0 && categoriesNavigator.lvl0 == category.key" class=" second-level-row">
<br>
<span class="little-menu-bar-midlvl"></span>
<div class="row row-fix" *ngFor="let subcategory of getSubcategories(category.key)">
<p class="menu-second-level lvl1" (click)="openSubcategory(subcategory)">{{ subcategory?.title?.toUpperCase() }} </p>
<div *ngIf="categoriesNavigator.lvl1 == subcategory.key">
<br>
<div class="row row-fix " *ngFor="let thirdLevel of getThirdLevel(category.key, subcategory.key); first as isFirst">
<div class="little-menu-bar-lowlvl" *ngIf="categoriesNavigator.lvl0 == category.key"></div>
<a [routerLink]="thirdLevel.url"
[style.color]="checkSelectedUrl(subcategory.key, thirdLevel.key) ? 'orange' : 'gray'"
class="menu-third-level lvl2"
[routerLinkActive]="active-route"
[style.marginTop]="isFirst ? '-20px' : '0px'">
{{ thirdLevel?.title?.toUpperCase() }} </a>
<!-- <a href="thirdLevel.url" class="menu-third-level lvl2" [style.marginTop]="isFirst ? '-20px' : '0px'">{{ thirdLevel?.title?.toUpperCase() }} </a>
!-->
</div>
</div>
</div>
</div>
</div>
</div>
跑
服务
使用者
注销
菜单
菜单
{{{category?.title?.toUpperCase()}
!-->
您可以检查router.url==thirdLevel.url它看起来是否像[ngStyle]=“{'color':router.url===thirdLevel.url?'green':'red'}”
啊,如果你有像/shop/category/books
这样的路线,那么你需要获取URL的最后一部分,并将其与生成的URL进行比较。我不知道它在你的应用程序中到底是什么样子的,但是这个解决方案应该可以让它工作。不过,这只是一个解决办法
它也将与[ngClass]
一起使用
如果要快速检查,请添加直接url而不是thirLevel.url,例如[ngStyle]=“{'color':router.url==='/sign'?'green':'red'}”
。检查控制台中是否添加了颜色
您的
checkSelectedUrl
功能实际上并不是一种有角度的做事方式。您有路由器模块,它为您提供所需的信息,如果您可以访问活动的路由URL,切换类/样式应该不会有问题。RouterLink活动-工作不正常?它应该将类添加到活动路由中,并且应该足以显示用户所在的位置。“活动”类别是否添加到活动路线?我想这应该是我要问的第一个问题,但您是否声明了将activeLink绑定到的活动变量?啊,如果您不需要双向数据绑定,只需执行routerLinkActive=“class”(不带[])即可添加整个html模板。@Adriansawick是的,它对我不起作用,我不知道为什么,但它不会将css类应用于元素。必须添加整个模板…[RouterLink active]=“active route”将其更改为“active”您不能声明active route变量,然后在您的键入脚本部分添加public active=“您的类,例如“active route”,并将.active route类添加到您的css中。@Adriansawick我在css中声明了一个名为“active route”的类,它不应该像那样工作吗?
<div class="menu-container">
<div class="row header">
<img class="logo" src="../../../assets/menu-header.PNG">
<div class="row top-right-buttons" *ngIf="menuData">
<div class="col-md-3 top-menu-item" (click)="topMenuActivity('runs', runsmodal)">
<i class="fa fa-calendar top-icon"></i>
<span class="top-menu-text">RUNS</span>
</div>
<div class="col-md-3 top-menu-item" (click)="topMenuActivity('op-service', servicemodal)">
<i class="fa fa-envelope-o top-icon"></i>
<span class="top-menu-text">SERVICE</span>
</div>
<div class="col-md-3 top-menu-item" (click)="topMenuActivity('user', usermodal)">
<i class="fa fa-user top-icon"></i>
<span class="top-menu-text">USER</span>
</div>
<div class="col-md-3 top-menu-item" (click)="topMenuActivity('logout', null)">
<i class="fa fa-power-off"></i>
<span class="top-menu-text">LOGOUT</span>
</div>
</div>
</div>
<div class="row menu-btn">
<div class="ext-menu-btn" (click)="openMenu()" *ngIf="menuData">
<span class="menu-span" [@menuStringAnim]="active">MENU</span>
<i class="fa fa-bars menu-icon" [@menuIconAnim]="active"></i>
</div>
</div>
</div>
<div class="menu-list" [@menuListAnim]="active" *ngIf="menuData">
<div class="inner-menu-btn" (click)="openMenu()">
<span class="menu-span-inner" style="left: 35px">MENU</span>
<i class="fa fa-arrow-left menu-close-btn"></i>
</div>
<div class="row row-fix " *ngFor="let category of getCategories()">
<div class="little-menu-bar-toplvl" *ngIf="categoriesNavigator.lvl0 == category.key">
</div>
<p class="menu-top-level lvl0" (click)="openCategory(category)">{{ category?.title?.toUpperCase() }} </p>
<div *ngIf="categoriesNavigator.lvl0 && categoriesNavigator.lvl0 == category.key" class=" second-level-row">
<br>
<span class="little-menu-bar-midlvl"></span>
<div class="row row-fix" *ngFor="let subcategory of getSubcategories(category.key)">
<p class="menu-second-level lvl1" (click)="openSubcategory(subcategory)">{{ subcategory?.title?.toUpperCase() }} </p>
<div *ngIf="categoriesNavigator.lvl1 == subcategory.key">
<br>
<div class="row row-fix " *ngFor="let thirdLevel of getThirdLevel(category.key, subcategory.key); first as isFirst">
<div class="little-menu-bar-lowlvl" *ngIf="categoriesNavigator.lvl0 == category.key"></div>
<a [routerLink]="thirdLevel.url"
[style.color]="checkSelectedUrl(subcategory.key, thirdLevel.key) ? 'orange' : 'gray'"
class="menu-third-level lvl2"
[routerLinkActive]="active-route"
[style.marginTop]="isFirst ? '-20px' : '0px'">
{{ thirdLevel?.title?.toUpperCase() }} </a>
<!-- <a href="thirdLevel.url" class="menu-third-level lvl2" [style.marginTop]="isFirst ? '-20px' : '0px'">{{ thirdLevel?.title?.toUpperCase() }} </a>
!-->
</div>
</div>
</div>
</div>
</div>
</div>