>本教程演示了使用Angularjs构建幻灯片插件,从而避免使用更清洁,更简洁的代码库。 我们利用角指令和动画来实现这一目标。 假定对AngularJS指令的熟悉。
键优点:
>
我们首先创建一个孤立的angularjs指令:
slider
是隔离的,以防止与父范围的冲突。
var sliderApp = angular.module('sliderApp', ['ngAnimate']); // Note: ngAnimate included sliderApp.directive('slider', function($timeout) { return { restrict: 'AE', replace: true, scope: { images: '=' }, link: function(scope, elem, attrs) { scope.currentIndex = 0; scope.next = function() { scope.currentIndex = (scope.currentIndex + 1) % scope.images.length; }; scope.prev = function() { scope.currentIndex = (scope.currentIndex - 1 + scope.images.length) % scope.images.length; }; scope.$watch('currentIndex', function() { scope.images.forEach(function(image) { image.visible = false; }); scope.images[scope.currentIndex].visible = true; }); var timer; var sliderFunc = function() { timer = $timeout(function() { scope.next(); timer = $timeout(sliderFunc, 5000); // Adjust interval as needed }, 5000); }; sliderFunc(); scope.$on('$destroy', function() { $timeout.cancel(timer); }); }, templateUrl: 'templates/templateurl.html' }; });
scope
>images
>步骤2:图像数据控制器ngAnimate
一个控制器提供图像数据:
)
sliderApp.controller('SliderController', function($scope) { $scope.images = [ { src: 'img1.png', title: 'Pic 1' }, { src: 'img2.jpg', title: 'Pic 2' }, { src: 'img3.jpg', title: 'Pic 3' }, { src: 'img4.png', title: 'Pic 4' }, { src: 'img5.png', title: 'Pic 5' } ]; });
指令的html模板使用显示图像:templates/templateurl.html
ng-repeat
<div class="slider"> <div class="slide" ng-repeat="image in images" ng-show="image.visible"> <img src="/static/imghw/default1.png" data-src="https://img.php.cn/" class="lazy" alt="Creating a Slide Show Plugin With AngularJS - SitePoint" /> <p>{{image.title}}</p> </div> <div class="arrows"> <a href="https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15b" ng-click="prev()"><img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/174018895287877.png" class="lazy" alt="Creating a Slide Show Plugin With AngularJS - SitePoint" /></a> <a href="https://www.php.cn/link/93ac0c50dd620dc7b88e5fe05c70e15b" ng-click="next()"><img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/174018895383537.png" class="lazy" alt="Creating a Slide Show Plugin With AngularJS - SitePoint" /></a> </div> </div>
步骤5:使用指令
> 在您的主HTML中,包括指令和控制器:记住要包含用于设计滑块的必要CSS。 此增强示例包括自动幻灯片功能和改进的错误处理。 切记用实际的图像URL替换占位符图像路径。 添加了
.slide.ng-hide-add, .slide.ng-hide-remove { transition: opacity 0.5s linear; } .slide.ng-hide-add.ng-hide-add-active, .slide.ng-hide-remove { opacity: 0; } .slide.ng-hide-add, .slide.ng-hide-remove.ng-hide-remove-active { opacity: 1; }
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