<http://plnkr.co/edit/AxBJs2XICPtWaA7bup8G?p=preview>

```
<li ng-repeat="d in data"><input type="checkbox"/>{{$index}}</li>
<button ng-show="checkismorethanone">Save</button>

```

I can't use ng-model because it will check all the checkbox. How can I know if there's any of the checkbox checked? I want to show the save button if anyone of the checkbox is checked, or hide the button if no more button is checked.