AngularJS自定义插件实现网站用户引导功能示例
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AngularJS自定义插件实现网站用户引导功能示例,
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本文实例讲述了AngularJS自定义插件实现网站用户引导功能。分享给大家供大家参考,具体如下:
最近由于项目进行了较大的改版,为了让用户能够适应这次新的改版,因此在系统中引入了“用户引导”功能,对于初次进入系统的用户一些简单的使用培训training。对于大多数网站来说,这是一个很常见的功能。所以在开发这个任务之前,博主尝试将其抽象化,独立于现有系统的业务逻辑,将其封装为一个通用的插件,使得代码更容易扩展和维护。
无图无真相,先上图:
关于这款trainning插件的使用很简单,它采用了类似Angular路由一样的配置,只需要简单的配置其每一步training信息。
标题信息;
template/templateUrl:
step的内容模板信息。这类可以配置html元素,或者是模板的URL地址,同时templateUrl也支持Angular route一样的function语法;
controller:
step的控制器配置;在controller中可注入如下参数:当前step – currentStep、所有step的配置 – trainnings、当前step的配置 – currentTrainning、以及下一步的操作回调 – trainningInstance(其中nextStep:为下一步的回调,cancel为取消用户引导回调);
controllerAs:
controller的别名;
resolve:
在controller初始化前的数据配置,同Angular路由中的resolve;
locals:
本地变量,和resolve相似,可以传递到controller中。区别之处在于它不支持function调用,对于常量书写会比resolve更方便;
placement:
step容器上三角箭头的显示方位,
position:
step容器的具体显示位置,这是一个绝对坐标;可以传递{left: 100,top: 100}的绝对坐标,也可以是#stepPanelHost配置相对于此元素的placement位置。同时它也支持自定义function和注入Angular的其他组件语法。并且默认可注入:所有step配置 – trainnings,当前步骤 – step,当前step的配置 – currentTrainning,以及step容器节点 – stepPanel;
backdrop:
是否需要显示遮罩层,默认显示,除非显示声明为false配置,则不会显示遮罩层;
stepClass:
每一个step容器的样式信息;
backdropClass:
每一个遮罩层的样式信息。
了解了这些配置后,并根据特定需求定制化整个用户引导的配置信息后,我们就可以使用trainningService的trainning方法来在特定实际启动用户引导,传入参数为每一步step的配置信息。并可以注册其done或者cancel事件:
下面是一个演示的配置信息:
自定义函数,使其屏幕居中
var win = angular.element($window);
return {
top: (win.height() - stepPanel.height()) / 2,left: (win.width() - stepPanel.width()) / 2
}
}]
}]
})
本文插件源码和演示效果唯一codepen上,效果图如下:
在trainning插件的源码设计中,包含如下几个要点:
插件,它是一个全局的插件,正好在Angular中所有的service也是单例的,所以将用户引导逻辑封装到Angular的service中是一个不错的设计。但对于trainning的每一步展示内容信息则是DOM操作,在Angular的处理中它不该存在于service中,最佳的方式是应该把他封装到Directive中。所以这里采用Directive的定义,并在service中compile,然后append到body中。
插件应该封装一个独立的scope,这样便于在后续的销毁,以及不会与现有的scope变量的冲突。
插件或者modal这类操作结果采用promise的封装,是一个不错的选择。它取代了回调参数的复杂性,并以流畅API的方式展现,更利于代码的可读性。同时也能与其他Angular service统一返回API。
代码,完全可以移到到你的同类插件中去。它们可以增加插件的更多定制化扩展。关于这部分代码的解释,博主将会在后续文章中为大家推送。
调用Angular service,这样既能获取Angular其他service注入的扩展性,也能获取到函数的动态性。如上例中的屏幕居中的自定义扩展方式。
这类设计要点,同样可以运用到想modal、alert、overload这类全局插件中。有兴趣的读者,你可以在博主的codepen笔记中阅读这段代码nofollow" target="_blank" href="http://codepen.io/greengerong/pen/pjwXQW#0">http://codepen.io/greengerong/pen/pjwXQW#0。
上述代码摘录如下:
HTML:
All trainning setps done!
CSS:
JS:
')
.attr({
'backdrop-class': 'backdropClass','z-index': 'zIndex'
});
var backdropScope = $rootScope.$new(true);
backdropScope.backdropClass = backdropClass;
backdropScope.zIndex = zIndex;
$document.find('body').append($compile($backdrop)(backdropScope));
return function() {
$backdrop.remove();
backdropScope.$destroy();
};
};
}]);
angular.module('com.github.greengerong.trainning',['com.github.greengerong.backdrop','ui.bootstrap'])
.directive('trainningStep',['$timeout','$http','$templateCache','$position','$injector','$window','$q','$controller',function($timeout,$http,$templateCache,$position,$injector,$window,$q,$controller) {
return {
restrict: 'EA',templateUrl: 'trainning-step.html',scope: {
step: '=',trainnings: '=',nextStep: '&',cancel: '&'
},link: function(stepPanelScope,elm) {
var stepPanel = elm.find('.step-panel');
stepPanelScope.$watch('step',function(step) {
if (!step) {
return;
}
stepPanelScope.currentTrainning = stepPanelScope.trainnings[stepPanelScope.step - 1];
var contentScope = stepPanelScope.$new(false);
loadStepContent(contentScope,{
'currentStep': stepPanelScope.step,'trainnings': stepPanelScope.trainnings,'currentTrainning': stepPanelScope.currentTrainning,'trainningInstance': {
'nextStep': stepPanelScope.nextStep,'cancel': stepPanelScope.cancel
}
}).then(function(tplAndVars) {
elm.find('.popover-content').html($compile(tplAndVars[0])(contentScope));
}).then(function() {
var pos = stepPanelScope.currentTrainning.position;
adjustPosition(stepPanelScope,stepPanel,pos);
});
});
angular.element($window).bind('resize',function() {
adjustPosition(stepPanelScope,stepPanelScope.currentTrainning.position);
});
stepPanelScope.$on('$destroy',function() {
angular.element($window).unbind('resize');
});
function getPositionOnElement(stepScope,setpPos) {
return $position.positionElements(angular.element(setpPos),stepScope.currentTrainning.placement,true);
}
function positionOnElement(stepScope,setpPos) {
var targetPos = angular.isString(setpPos) ? getPositionOnElement(stepScope,setpPos) : setpPos;
var positionStyle = stepScope.currentTrainning || {};
positionStyle.top = targetPos.top + 'px';
positionStyle.left = targetPos.left + 'px';
stepScope.positionStyle = positionStyle;
}
function adjustPosition(stepScope,pos) {
if (!pos) {
return;
}
var setpPos = angular.isFunction(pos) || angular.isArray(pos) ? $injector.invoke(pos,null,{
trainnings: stepScope.trainnings,step: stepScope.setp,currentTrainning: stepScope.currentTrainning,stepPanel: stepPanel
}) : pos;
//get postion should wait for content setup
$timeout(function() {
positionOnElement(stepScope,setpPos);
});
}
function loadStepContent(contentScope,ctrlLocals) {
var trainningOptions = contentScope.currentTrainning,getTemplatePromise = function(options) {
return options.template ? $q.when(options.template) :
$http.get(angular.isFunction(options.templateUrl) ? (options.templateUrl)() : options.templateUrl,{
cache: $templateCache
}).then(function(result) {
return result.data;
});
},getResolvePromises = function(resolves) {
var promisesArr = [];
angular.forEach(resolves,function(value) {
if (angular.isFunction(value) || angular.isArray(value)) {
promisesArr.push($q.when($injector.invoke(value)));
}
});
return promisesArr;
},controllerLoader = function(trainningOptions,trainningScope,ctrlLocals,tplAndVars) {
var ctrlInstance;
ctrlLocals = angular.extend({},ctrlLocals || {},trainningOptions.locals || {});
var resolveIter = 1;
if (trainningOptions.controller) {
ctrlLocals.$scope = trainningScope;
angular.forEach(trainningOptions.resolve,function(value,key) {
ctrlLocals[key] = tplAndVars[resolveIter++];
});
ctrlInstance = $controller(trainningOptions.controller,ctrlLocals);
if (trainningOptions.controllerAs) {
trainningScope[trainningOptions.controllerAs] = ctrlInstance;
}
}
return trainningScope;
};
var templateAndResolvePromise = $q.all([getTemplatePromise(trainningOptions)].concat(getResolvePromises(trainningOptions.resolve || {})));
return templateAndResolvePromise.then(function resolveSuccess(tplAndVars) {
controllerLoader(trainningOptions,contentScope,tplAndVars);
return tplAndVars;
});
}
}
};
}])
.service('trainningService',['$compile','$rootScope',function($compile,$rootScope,$document,$q) {
var self = this;
self.trainning = function(trainnings) {
var trainningScope = $rootScope.$new(true),defer = $q.defer(),$stepElm = angular.element('')
.attr({
'step': 'step','trainnings': 'trainnings','next-step': 'nextStep($event,step);','cancel': 'cancel($event,step)'
}),destroyTrainningPanel = function(){
if (trainningScope) {
$stepElm.remove();
trainningScope.$destroy();
}
};
trainningScope.cancel = function($event,step){
defer.reject('cancel');
};
trainningScope.nextStep = function($event,step) {
if (trainningScope.step === trainnings.length) {
destroyTrainningPanel();
return defer.resolve('done');
}
trainningScope.step++;
};
trainningScope.trainnings = trainnings;
trainningScope.step = 1;
$document.find('body').append($compile($stepElm)(trainningScope));
trainningScope.$on('$locationChangeStart',destroyTrainningPanel);
return {
done: function(func) {
defer.promise.then(func);
return this;
},cancel: function(func) {
defer.promise.then(null,func);
return this;
}
};
};
}]);
angular.module('com.github.greengerong',['com.github.greengerong.trainning'])
.filter('range',[function () {
return function (len) {
return _.range(1,len + 1);
};
}])
.controller('StepPanelController',['currentStep','trainnings','trainningInstance',function(currentStep,trainnings,trainningInstance,trainnings) {
var vm = this;
vm.currentStep = currentStep;
vm.trainningInstance = trainningInstance;
vm.trainnings = trainnings;
vm.texts = ['Write your own sort blog.','Click button to public your blog.','View your blog info on there.','Click this button,you can restart this trainning when .','All trainnings done!'];
return vm;
}])
.constant('trainningCourses',{
title: 'Step 2:',placement: 'right',backdrop: false,position: '#submitBlog'
},{
title: 'Step 4:',placement: 'bottom',position: '#startAgain'
},{
stepClass: 'last-step',stepPanel) {
var win = angular.element($window);
return {
top: (win.height() - stepPanel.height()) / 2,left: (win.width() - stepPanel.width()) / 2
}
}]
}]
})
.controller('DemoController',['trainningService','trainningCourses','modalBackdropService',function(trainningService,trainningCourses,modalBackdropService) {
var vm = this;
vm.trainning = function() {
//call this service should wait your really document ready event.
trainningService.trainning(trainningCourses.courses)
.done(function() {
vm.isDone = true;
});
};
var backdropInstance = angular.noop;
vm.backdrop = function() {
modalBackdropService.backdrop();
};
vm.trainning();
return vm;
}]);
希望本文所述对大家AngularJS程序设计有所帮助。
原文链接:https://www.f2er.com/js/44608.html