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SolarTerms.controller('FooterCtrl', ['$state', '$rootScope', '$scope', function ($state, $rootScope, $scope) {

$scope.imgsrc = {
    "imda1":"img/icon1.png",
    "imda2":"img/icon2.png",
    "imda3":"img/icon3.png",
    "imda4":"img/icon4.png",
    "imda5":"img/icon5.png"
}

}])

SolarTerms.directive("tabImg",function () {

    return {
        restrict:'A',
        scope:false,
        link:function (scope,ele,attr,ctrl) {
            ele.bind('click',function (event) {
                var index = $(this).index();
                scope.imgsrc = {
                    "imda1":"img/icon1.png",
                    "imda2":"img/icon2.png",
                    "imda3":"img/icon3.png",
                    "imda4":"img/icon4.png",
                    "imda5":"img/icon5.png"
                };
                scope.imgsrc['imda'+(index+1)] = 'img/icon'+(index+1)+'1.png';
                //scope.$apply(scope.imgsrc['imda'+(index+1)] = 'img/icon'+(index+1)+'1.png')
            })
        }
    }
})

<p tab-img class="I_AF_p" ng-click="goto('index')"><img ng-src="{{imgsrc.imda1}}" alt=""><span>首頁</span></p>
<p tab-img class="I_AF_p" ng-click="goto('ye')"><img ng-src="{{imgsrc.imda2}}" alt=""><span>余額</span></p>
<p tab-img class="I_AF_p" ng-click="goto('js')"><img ng-src="{{imgsrc.imda3}}" alt=""><span>計算</span></p>
<p tab-img class="I_AF_p" ng-click="goto('ck')"><img ng-src="{{imgsrc.imda4}}" alt=""><span>查看</span></p>
<p tab-img class="I_AF_p" ng-click="goto('wd')"><img ng-src="{{imgsrc.imda5}}" alt=""><span>文檔</span></p>

點擊相應(yīng)的p之后獲取索引，然后更改$scope.imgsrc中相應(yīng)的值，控制臺能正確輸出圖片地址，但是視圖中ng-src中的值為什么需要點擊兩次才能改變，我只是想更改ng-src中的圖片地址，剛開始學(xué)angularjs，誰幫我解釋下，謝謝。