为什么离子导航按钮内的按钮不会像表单内的按钮那样返回用户输入？
<ion-nav-buttons side="right">
<button class="button button-icon icon" ng-click="login(user)">Signup</button>
</ion-nav-buttons>
<form>
Email: <input type="text" ng-model="user.teste" placeholder="test@gmail.com"/><br />
<button ng-click="login(user)">Signup</button>
</form>
$scope.login = function(form){
alert(form.teste)
}