指令范围变量不适用于ng-show [英] Directive scope variable not working with ng-show

问题描述

我有一个使用指令的"home"控制器.我希望能够根据控制器中变量的值在指令模板中显示/隐藏按钮.

I have a "home" controller that uses a directive. I want to be able to show/hide a button in the directive template depending on the value of a variable in the controller.

这是我的指令的样子:

angular.module("goleadoresApp").directive("golNavbar", [golNavbar]);
function golNavbar() {
    return {
        restrict: "EA",
        templateUrl: "views/templates/golNavbar.html",
        scope: {
            pageTitle: "@",
            showLockIcon: "@"
        }
    };
}

还有我的模板:

<div class="bar bar-header bar-balanced">
     <h1 class="title">
         <i class="gol-logo-icon icon ion-ios-football"></i>
        <span ng-bind="pageTitle"></span>
     </h1>
     <!--For testing purposes: This variable renders as false, however, ng-show in line below doesn't work-->       
     {{showLockIcon}} 
     <!--ng-show won't work. Element would still be visible even if showLockIcon is false-->
     <a class="button icon ion-locked pull-right second-right-button" 
        ng-show="showLockIcon"></a>
     <a class="button icon ion-help-circled" href="#/help"></a>
</div>

从我的角度来看，我将使用该模板，并向其传递一个控制器变量(canPredictionsBePosted)，该变量具有true或false值，并且我希望，如果为true，则按钮将在模板中显示:

From my view, I'll use the template and pass it a controller variable (canPredictionsBePosted) that holds a value of true or false, and for which I expect that, if true, button will show in the template:

<gol-navbar page-title="{{matchWeek}}"
            show-lock-icon="{{canPredictionsBePosted}}"">
</gol-navbar>

运行此代码时，实际上可以看到传递给showLockIcon模板变量的值是正确的，但是指令模板中具有ng-show的元素将不起作用.这意味着当我将其传递为false值时，该按钮仍然可见.

When running this code, I can actually see that the value passed to showLockIcon template variable is correct, but the element in the directive template, which has the ng-show, won't work. That means that when I pass it a value of false, the button is still visible.

有什么想法吗?

此外，如果我在家庭控制器中更改canPredictionsBePosted变量的值，则模板中showLockIcon的值不会更新.我怎样才能使它正常工作?

Furthermore, if I change the value of the canPredictionsBePosted variable in my home controller, the value of showLockIcon in the template doesn't get updated. How could I get this to work?

预先感谢，我是指令的新手，所以感谢所有帮助.

Thanks in advance, I'm new to directives, so all help is appreciated.

推荐答案

您需要进行两项更改.

1)将=用于showLockIcon，如下所示:

1) Use = for showLockIcon like below:

    scope: {
        pageTitle: "@",
        showLockIcon: "="
    }

2)删除show-lock-icon="{{canPredictionsBePosted}}"

<gol-navbar page-title="{{matchWeek}}"
            show-lock-icon="canPredictionsBePosted">
</gol-navbar>

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