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<template>
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<view
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v-if="inited"
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class="u-transition"
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ref="u-transition"
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@tap="clickHandler"
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:class="classes"
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:style="[mergeStyle]"
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@touchmove="noop"
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>
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<slot />
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</view>
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</template>
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<script>
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import props from './props.js';
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// 组件的methods方法，由于内容较长，写在外部文件中通过mixin引入
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import transition from "./transition.js";
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/**
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* transition 动画组件
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* @description
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* @tutorial
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* @property {String} show 是否展示组件 （默认 false ）
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* @property {String} mode 使用的动画模式 （默认 'fade' ）
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* @property {String | Number} duration 动画的执行时间，单位ms （默认 '300' ）
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* @property {String} timingFunction 使用的动画过渡函数 （默认 'ease-out' ）
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* @property {Object} customStyle 自定义样式
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* @event {Function} before-enter 进入前触发
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* @event {Function} enter 进入中触发
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* @event {Function} after-enter 进入后触发
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* @event {Function} before-leave 离开前触发
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* @event {Function} leave 离开中触发
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* @event {Function} after-leave 离开后触发
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* @example
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*/
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export default {
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name: 'u-transition',
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data() {
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return {
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inited: false, // 是否显示/隐藏组件
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viewStyle: {}, // 组件内部的样式
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status: '', // 记录组件动画的状态
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transitionEnded: false, // 组件是否结束的标记
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display: false, // 组件是否展示
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classes: '', // 应用的类名
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}
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},
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computed: {
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mergeStyle() {
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const { viewStyle, customStyle } = this
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return {
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// #ifndef APP-NVUE
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transitionDuration: `${this.duration}ms`,
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// display: `${this.display ? '' : 'none'}`,
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transitionTimingFunction: this.timingFunction,
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// #endif
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// 避免自定义样式影响到动画属性，所以写在viewStyle前面
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...uni.$u.addStyle(customStyle),
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...viewStyle
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}
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}
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},
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// 将mixin挂在到组件中，uni.$u.mixin实际上为一个vue格式对象
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mixins: [uni.$u.mpMixin, uni.$u.mixin, transition, props],
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watch: {
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show: {
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handler(newVal) {
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// vue和nvue分别执行不同的方法
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// #ifdef APP-NVUE
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newVal ? this.nvueEnter() : this.nvueLeave()
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// #endif
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// #ifndef APP-NVUE
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newVal ? this.vueEnter() : this.vueLeave()
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// #endif
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},
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// 表示同时监听初始化时的props的show的意思
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immediate: true
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}
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}
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}
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</script>
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<style lang="scss" scoped>
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@import '../../libs/css/components.scss';
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/* #ifndef APP-NVUE */
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// vue版本动画相关的样式抽离在外部文件
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@import './vue.ani-style.scss';
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/* #endif */
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.u-transition {}
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</style>
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