ng-disabled控制按钮是否可点击

<div class="edit-template-column" style="padding-bottom: 15px;"
     ng-if="!$ctrl.displayMore && $index<0||$ctrl.displayMore">
    <span class="margin-right-12">导入设置:</span>
    <md-checkbox class="no-margin-bottom" aria-label="checked"
                 ng-checked="table.WillUpdate"
                 ng-click="table.WillUpdate=!table.WillUpdate">
        <span>导入时是否更新数据</span>
    </md-checkbox>
    <md-checkbox class="no-margin-bottom" aria-label="checkbox"
                 ng-checked="table.WillInsert"
                 ng-click="table.WillInsert=!table.WillInsert"
                 ng-disabled="!table.WillUpdate">
        <span>导入时是否新增数据</span>
    </md-checkbox>
    <md-checkbox class="no-margin-bottom" aria-label="checkbox"
                 ng-checked="table.WillDelete"
                 ng-click="table.WillDelete=!table.WillDelete"
                 ng-disabled="!table.WillUpdate">
        <span>导入时是否删除数据</span>
    </md-checkbox>
</div>

未选中时状态：

选中时状态：