$scope.showAlert = function() { 
      var alertPopup = $ionicPopup.alert({ 
        title: 'Don\'t eat that!', 
        template: '<h1>It might taste good</h1>' 
      }); 
    }; 
    $scope.$watch('$viewContentLoaded', function() { 
      $scope.showAlert(); 
    }); 

// 一个确认对话框
  $scope.showConfirm = function() {
   var confirmPopup = $ionicPopup.confirm({
    title: 'Consume Ice Cream',
    template: 'Are you sure you want to eat this ice cream?'
   });
   confirmPopup.then(function(res) {
    if(res) {
     console.log('You are sure');
    } else {
     console.log('You are not sure');
    }
   });
  };

$scope.$watch('$viewContentLoaded', function() { 
    $scope.showConfirm(); 
  });