注意动画的钩子函数的判断逻辑，注意动画编写时类名的顺序！！
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>vue</title>
<style>
.box{
width: 200px;
height: 200px;
background-color: red;
}
.guo-enter-active,.guo-leave-active{
width: 200px;
height: 200px;
opacity: 1;
background-color: red;
transition: 0.7s;
}
.guo-leave-to{
width: 100px;
height: 100px;
opacity: 0;
background-color: orange;
}
.guo-enter{
width: 100px;
height: 100px;
opacity: 0;
background-color: orange;
}
.box2{
margin-top: 100px;
}
</style>
<script src='vue.min.js'></script>
</head>
<body>
<div id='app'>
<div>
<input type="button" value='change' @click='change'>
<transition name='guo' @after-enter='Enter' @after-leave='Leave'>
<div v-show='show' class='box'></div>
</transition>
<transition name='guo' @enter='Enter2' @after-leave='Leave2'>
<div v-show='show2' class='box box2'></div>
</transition>
</div>
</div>
<script>
new Vue({
el:'#app',
data:{
show:false,
show2:false
},
methods:{
change(){
this.show = !this.show;
},
Enter(){
this.show2 = true;
},
Leave(){
this.show2=false;
},
Leave2(){
this.show = true;
},
Enter2(){
this.show = false;
}
}
});
</script>
</body>
</html>