angularjs ng-style:background-image不起作用

Question

我正试图通过使用角度将背景图像应用于div ng-style(我之前尝试过使用相同行为的自定义指令),但它似乎不起作用.

<nav
    class="navigation-grid-container"
    data-ng-class="{ bigger: isNavActive == true }"
    data-ng-controller="NavigationCtrl"
    data-ng-mouseenter="isNavActive = true; $parent.isNavActive = true"
    data-ng-mouseleave="isNavActive = false; $parent.isNavActive = false"
    data-ng-show="$parent.navInvisible == false"
    data-ng-animate="'fade'"
    ng-cloak>

    <ul class="navigation-container unstyled clearfix">
        <li
            class="navigation-item-container"
            data-ng-repeat="(key, item) in navigation"
            data-ng-class="{ small: $parent.isNavActive, big: isActive == true }"
            data-ng-mouseenter="isActive = true; isInactive= false"
            data-ng-mouseleave="isActive = false; isInactive= true">

            <div data-ng-switch on="item.id">

                <div class="navigation-item-default" data-ng-switch-when="scandinavia">
                    <a class="navigation-item-overlay" data-ng-href="{{item.id}}">
                        <div class="navigation-item-teaser">
                            <span class="navigation-item-teaser-text" data-ng-class="{ small: isScandinavia }">{{item.teaser}}</span>
                        </div>
                    </a>
                    <span class="navigation-item-background" data-ng-style="{ 'background-image': 'public/img/products/{{item.id}}/detail/wide/{{item.images.detail.wide[0]}}' }"></span>
                </div>

                <div class="navigation-item-last" data-ng-switch-when="static">
                    <div class="navigation-item-overlay">
                        <div class="navigation-item-teaser">
                            <span class="navigation-item-teaser-text">
                                <img data-ng-src="{{item.teaser}}">
                            </span>
                        </div>
                    </div>
                    <span class="navigation-item-background">
                        <img class="logo" data-ng-src="{{item.images.logo}}">
                    </span>
                </div>

                <div class="navigation-item-default" data-ng-switch-default>
                    <a class="navigation-item-overlay" data-ng-href="{{item.id}}">
                        <div class="navigation-item-teaser">
                            <span class="navigation-item-teaser-text">{{item.teaser}}</span>
                        </div>
                    </a>
                    <span class="navigation-item-background" data-ng-style="{ 'background-image': 'public/img/products/{{item.id}}/detail/wide/{{item.images.detail.wide[0]}}' }"></span>
                </div>

            </div>
        </li>
    </ul>
</nav>

虽然,如果我尝试背景颜色,它似乎工作正常.我也尝试了远程源和本地源http://lorempixel.com/g/400/200/sports/,但都没有工作.

Answer 1

可以通过几种方式解析动态值.

双花括号插值:

ng-style="{'background-image':'url({{myBackgroundUrl}})'}"

字符串连接:

ng-style="{'background-image': 'url(' + myBackgroundUrl + ')'}"

ES6模板文字:

ng-style="{'background-image': `url(${myBackgroundUrl})`}"

Answer 2

正确的语法background-image是:

background-image: url("path_to_image");

ng-style的正确语法是:

ng-style="{'background-image':'url(https://www.google.com/images/srpr/logo4w.png)'}">

Answer 3

如果你有数据,你正在等待服务器返回(item.id)并有一个像这样的结构:

ng-style="{'background-image':'url(https://www.myImageplusitsid/{{item.id}})'}"

确保添加类似的内容 ng-if="item.id"

否则你会有两个请求或一个有问题.

Answer 4

对于那些正在努力使用IE11的人

HTML

<div ng-style="getBackgroundStyle(imagepath)"></div>

JS

$scope.getBackgroundStyle = function(imagepath){
    return {
        'background-image':'url(' + imagepath + ')'
    }
}