ng-calss的几种使用方法。
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script src="js/"></script>
<style type="text/css">
.red{
width: 100px;
height: 100px;
background: red;
}
.green{
width: 100px; height: 100px;background: green;
}
</style>
</head>
<body>
<div ng-app="my-app">
<div ng-controller="frist">
<!--第一种 直接加变量-->
<div ng-class="tempClass"></div>
<!--第二种 用{{}} 包住的变量表达式-->
<div ng-class="{{bClass}}"></div>
<!--第三种-->
<div ng-class="{'red':num,'green':!num}"></div>
<!--第四种-->
<div ng-class="{true:'green',false:'red'}[num]"></div>
</div>
</div>
<script type="text/javascript">
var app = ('my-app',[]);
('frist',function($scope){
$ = 'green';
$ = "{'red':true,'green':false}"
$ = true;
})
</script>
</body>
</html>