Angularjs 如何在ionic framework中根据屏幕方向显示/隐藏元素？

我使用纯JS来检测设备的屏幕方向，但我不知道如何显示或隐藏取决于方向的元素。基本上与

这是模板的摘录

<img class="cover" ng-src="http://i.imgur.com/vkW3Lhe.jpg" ng-show="orientation.landscape">
<img class="cover" ng-src="http://i.imgur.com/vkW3Lhe.jpg" ng-show="orientation.portrait">

确保您使用，

$apply

等

angular.module('starter', [
    'ionic',
    'ngCordova'
])
    .factory('Orientation', function($ionicPlatform, $timeout){
        var ret = {
            LANDSCAPE: 'LANDSCAPE',
            PORTRAIT: 'PORTRAIT',
            current: void 0
        };

        function handleOrientation() {
            var ua = navigator.userAgent.toLowerCase();
            var isAndroid = ua.indexOf("android") > -1; // Detect Android devices
            if (isAndroid) {
                //window.orientation is different for iOS and Android
                if (window.orientation == 0 || window.orientation == 180) { //Landscape Mode
                    $timeout(function(){
                        ret.current = ret.LANDSCAPE;
                    })
                }
                else if (window.orientation == 90 || window.orientation == -90) { //Portrait Mode
                    $timeout(function(){
                        ret.current = ret.PORTRAIT;
                    })
                }
            }
            else {
                if (window.orientation == 90 || window.orientation == -90) { //Landscape Mode
                    $timeout(function(){
                        ret.current = ret.LANDSCAPE;
                    })
                }
                else if (window.orientation == 0 || window.orientation == 180) { //Portrait Mode
                    $timeout(function(){
                        ret.current = ret.PORTRAIT;
                    })
                }
            }
        }

        $ionicPlatform.ready(function() {
            window.addEventListener("orientationchange", handleOrientation);
            window.addEventListener("load", handleOrientation);
        })

        return ret;

    })
.controller('SomeController', function(Orientation, $scope) {
        $scope.$watch(
            function(){
                return Orientation.current; 
            },
            function(orientation){
                if(orientation === Orientation.LANDSCAPE) {

                }
                if(orientation === Orientation.PORTRAIT) {

                }
            })
    })

---

这是一个未经测试的快速答案，应该使用

$window

等进行重构。

angular.module('starter', [
    'ionic',
    'ngCordova'
])
    .factory('Orientation', function($ionicPlatform, $timeout){
        var ret = {
            LANDSCAPE: 'LANDSCAPE',
            PORTRAIT: 'PORTRAIT',
            current: void 0
        };

        function handleOrientation() {
            var ua = navigator.userAgent.toLowerCase();
            var isAndroid = ua.indexOf("android") > -1; // Detect Android devices
            if (isAndroid) {
                //window.orientation is different for iOS and Android
                if (window.orientation == 0 || window.orientation == 180) { //Landscape Mode
                    $timeout(function(){
                        ret.current = ret.LANDSCAPE;
                    })
                }
                else if (window.orientation == 90 || window.orientation == -90) { //Portrait Mode
                    $timeout(function(){
                        ret.current = ret.PORTRAIT;
                    })
                }
            }
            else {
                if (window.orientation == 90 || window.orientation == -90) { //Landscape Mode
                    $timeout(function(){
                        ret.current = ret.LANDSCAPE;
                    })
                }
                else if (window.orientation == 0 || window.orientation == 180) { //Portrait Mode
                    $timeout(function(){
                        ret.current = ret.PORTRAIT;
                    })
                }
            }
        }

        $ionicPlatform.ready(function() {
            window.addEventListener("orientationchange", handleOrientation);
            window.addEventListener("load", handleOrientation);
        })

        return ret;

    })
.controller('SomeController', function(Orientation, $scope) {
        $scope.$watch(
            function(){
                return Orientation.current; 
            },
            function(orientation){
                if(orientation === Orientation.LANDSCAPE) {

                }
                if(orientation === Orientation.PORTRAIT) {

                }
            })
    })