我有一个打开“编辑个人资料”屏幕的个人资料列表。该屏幕从左侧滑入。选择配置文件时,如果已经选择了一个屏幕,我希望它先滑出,更改所选的配置文件数据,然后滑入。
现在发生的是:当我第一次选择一个元素时,屏幕会滑入。当我更改选定的元素时,屏幕会停留在屏幕上,不会滑出和滑入。
以下是一个gif,以显示其现在的行为:
我的代码是:
Vue方法:
editProfile: function (index){
// this.editingProfile = false;
this.setProfile(index);
this.editingProfile = true;
}
HTML视图:
<transition name="fade" mode="out-in">
<div v-if="editingProfile" id="edit-profile">
<input placeholder="Profile Name" v-model="synced.profiles[synced.selectedProfile].name">
</div>
</transition>
CSS:
.fade-enter-active, .fade-leave-active {
transition: all .2s;
/* transform:translateX(0); */
}
.fade-enter, .fade-leave-to /* .fade-leave-active below version 2.1.8 */ {
opacity: 0;
transform:translateX(-100%);
}
更改个人资料时,如何使其正确滑出然后重新滑入?
答案 0 :(得分:4)
我认为我的评论有误。一种执行此操作的方法是利用:key
和v-if
,以便如果选择了一个面板,则可以告诉Vue渲染面板,然后以这种方式在面板之间切换。然后,您将不需要transition-group
。
关键是:key
告诉Vue一切都已改变。如果不进行处理,Vue会尝试尽可能多地回收。查看文档:{{3}}
在具有相同标签名称的元素之间切换时, 必须通过赋予Vue独特性来告诉Vue它们是独特的元素
key
个属性。否则,Vue的编译器只会替换 效率要素的含量。即使在技术上 虽然不必这样做,但总是建议您<transition>
组件中有多个项目。
考虑以下最小示例:
const panels = [{
title: "Hello"
},
{
title: "World"
},
{
title: "Foo"
},
{
title: "Bar"
}
];
const app = new Vue({
el: "#app",
data() {
return {
panels,
activePanel: null
};
},
computed: {
titles() {
return this.panels.map(panel => panel.title);
}
},
methods: {
handleTitleClick(idx) {
if (this.activePanel === idx) {
this.activePanel = null;
return;
}
this.activePanel = idx;
}
}
});
body {
margin: 0;
padding: 0;
}
#app {
display: flex;
align-items: stretch;
height: 100vh;
}
#panel-set {
flex: 1 0 70%;
display: flex;
}
#side-panel {
flex: 1 0 30%;
}
.panel {
padding: 1em;
flex: 1 0;
background-color: rgba(0, 0, 0, 0.2);
}
.slide-fade-enter-active,
.slide-fade-leave-active {
transition: transform 500ms ease-in-out;
}
.slide-fade-enter,
.slide-fade-leave-to {
transform: translateX(-100%);
}
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.min.js"></script>
<div id="app">
<div id="panel-set">
<transition name="slide-fade" mode="out-in">
<div class="panel" v-if="activePanel !== null" :key="activePanel">
<h2>{{panels[activePanel].title}}</h2>
<p>Lorem ipsum</p>
</div>
</transition>
</div>
<div id="side-panel">
<ul>
<li v-for="(title, idx) in titles" @click="handleTitleClick(idx)">{{title}}</li>
</ul>
</div>
</div>
答案 1 :(得分:2)
根本原因是v-if="editingProfile"
在代码中显示一个配置文件后始终为真。
一个解决方案首先将其设置为false,然后在this.$nextTick
中将其再次设置为true。但是您必须将this.editingProfile = true
放在一个setTimeout
中,并且延迟时间=过渡时间。否则,slide out
效果将被覆盖。
就像下面的演示一样:
new Vue({
el: '#emit-example-simple',
data() {
return {
editingProfile: false,
synced : {
profiles: [{'name':'A'}, {'name':'B'}, {'name':'C'}],
selectedProfile: 0
},
}
},
methods: {
editProfile: function (index){
this.editingProfile = !this.editingProfile
this.$nextTick(() => {
setTimeout(()=> {
this.synced.selectedProfile = index
this.editingProfile = true
}, 1200)
})
}
}
})
.fade-enter-active, .fade-leave-active {
transition: all 1.2s;
/* transform:translateX(0); */
}
.fade-enter, .fade-leave-to /* .fade-leave-active below version 2.1.8 */ {
opacity: 0;
transform:translateX(-100%);
border: 1px solid white;
}
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<div id="emit-example-simple">
<button @click="editProfile(0)">Profile 1</button>
<button @click="editProfile(1)">Profile 2</button>
<button @click="editProfile(2)">Profile 3</button>
<transition name="fade" mode="out-in">
<div v-if="editingProfile" id="edit-profile">
<input style="border: 5px solid red;" placeholder="Profile Name" v-model="synced.profiles[synced.selectedProfile].name">
</div>
</transition>
</div>
或者您可以考虑像下面的简单演示一样使用Group transition
:
new Vue({
el: '#emit-example-simple',
data() {
return {
editingProfile: false,
profileContainers: [true, false],
synced : {
profiles: [{'name':'A'}, {'name':'B'}, {'name':'C'}],
selectedProfile: 0
},
}
},
methods: {
editProfile: function (index){
this.synced.selectedProfile = index
this.profileContainers = this.profileContainers.map((x)=>!x)
}
}
})
.list-items-enter-active {
transition: all 1.2s;
}
.list-items-leave-active {
transition: all 1.2s;
}
.list-items-enter, .list-items-leave-to /* .fade-leave-active below version 2.1.8 */ {
opacity: 0;
transform:translateX(-100%);
border: 1px solid white;
}
.list-item {
display: inline-block;
border: 6px solid red;
}
<script src="https://unpkg.com/vue/dist/vue.js"></script>
<div id="emit-example-simple">
<button @click="editProfile(0)">Profile 1</button>
<button @click="editProfile(1)">Profile 2</button>
<button @click="editProfile(2)">Profile 3</button>
<transition-group name="list-items" tag="p">
<div v-for="(item, index) in profileContainers" :key="index" v-if="item">
<input style="border: 5px solid red;" placeholder="Profile Name" v-model="synced.profiles[synced.selectedProfile].name">
</div>
</transition-group>
</div>