ng-class同时编辑两个class

Question

<li ng-repeat="data in ruleList" class="" ng-click="lookRule(data.ruleId)" data-rule-id={{data.ruleId}} ng-init="delete = false" ng-class="$first ? 'active' : ''">{{data.ruleName}}</li>
一行代码里面想同时判断两个class（active和delete）
现在我用$first的方法判断了第一个，但是似乎ng-class里面不能同时写两个class判断
还有其他方法可以同时使用angualr在初始化时判断两个class
（重点是两个条件分别判断两个class）

Answer 1

分别判断两个class的话，用对象表达式

https://docs.angularjs.org/ap...
If the expression evaluates to an object, then for each key-value pair of the object with a truthy value the corresponding key is used as a class name.

例如:

<li ng-repeat="data in ruleList" ng-class="{'active': $first, 'delete': $last}">{{data.ruleName}}</li>

Answer 2

可以写一个方法返回相应的类