158 lines
6.1 KiB
JavaScript
158 lines
6.1 KiB
JavaScript
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// 定义一个一定时间后自动成功的promise，让调用nextTick方法处，进入下一个then方法
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const nextTick = () => new Promise(resolve => setTimeout(resolve, 1000 / 50))
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// nvue动画模块实现细节抽离在外部文件
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import animationMap from './nvue.ani-map.js'
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// #ifndef APP-NVUE
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// 定义类名，通过给元素动态切换类名，赋予元素一定的css动画样式
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const getClassNames = (name) => ({
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enter: `u-${name}-enter u-${name}-enter-active`,
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'enter-to': `u-${name}-enter-to u-${name}-enter-active`,
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leave: `u-${name}-leave u-${name}-leave-active`,
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'leave-to': `u-${name}-leave-to u-${name}-leave-active`
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})
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// #endif
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// #ifdef APP-NVUE
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// 引入nvue(weex)的animation动画模块，文档见：
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// https://weex.apache.org/zh/docs/modules/animation.html#transition
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const animation = uni.requireNativePlugin('animation')
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const getStyle = (name) => animationMap[name]
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// #endif
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export default {
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methods: {
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// 组件被点击发出事件
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clickHandler() {
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this.$emit('click')
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},
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// #ifndef APP-NVUE
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// vue版本的组件进场处理
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vueEnter() {
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// 动画进入时的类名
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const classNames = getClassNames(this.mode)
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// 定义状态和发出动画进入前事件
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this.status = 'enter'
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this.$emit('beforeEnter')
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this.inited = true
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this.display = true
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this.classes = classNames.enter
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this.$nextTick(async () => {
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// #ifdef H5
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await uni.$u.sleep(20)
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// #endif
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// 标识动画尚未结束
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this.$emit('enter')
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this.transitionEnded = false
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// 组件动画进入后触发的事件
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this.$emit('afterEnter')
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// 赋予组件enter-to类名
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this.classes = classNames['enter-to']
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})
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},
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// 动画离场处理
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vueLeave() {
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// 如果不是展示状态，无需执行逻辑
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if (!this.display) return
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const classNames = getClassNames(this.mode)
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// 标记离开状态和发出事件
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this.status = 'leave'
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this.$emit('beforeLeave')
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// 获得类名
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this.classes = classNames.leave
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this.$nextTick(() => {
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// 动画正在离场的状态
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this.transitionEnded = false
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this.$emit('leave')
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// 组件执行动画，到了执行的执行时间后，执行一些额外处理
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setTimeout(this.onTransitionEnd, this.duration)
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this.classes = classNames['leave-to']
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})
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},
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// #endif
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// #ifdef APP-NVUE
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// nvue版本动画进场
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nvueEnter() {
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// 获得样式的名称
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const currentStyle = getStyle(this.mode)
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// 组件动画状态和发出事件
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this.status = 'enter'
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this.$emit('beforeEnter')
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// 展示生成组件元素
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this.inited = true
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this.display = true
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// 在nvue安卓上，由于渲染速度慢，在弹窗，键盘，日历等组件中，渲染其中的内容需要时间
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// 导致出现弹窗卡顿，这里让其一开始为透明状态，等一定时间渲染完成后，再让其隐藏起来，再让其按正常逻辑出现
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this.viewStyle = {
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opacity: 0
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}
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// 等待弹窗内容渲染完成
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this.$nextTick(() => {
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// 合并样式
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this.viewStyle = currentStyle.enter
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Promise.resolve()
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.then(nextTick)
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.then(() => {
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// 组件开始进入前的事件
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this.$emit('enter')
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// nvue的transition动画模块需要通过ref调用组件，注意此处的ref不同于vue的this.$refs['u-transition']用法
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animation.transition(this.$refs['u-transition'].ref, {
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styles: currentStyle['enter-to'],
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duration: this.duration,
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timingFunction: this.timingFunction,
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needLayout: false,
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delay: 0
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}, () => {
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// 动画执行完毕，发出事件
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this.$emit('afterEnter')
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})
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})
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.catch(() => {})
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})
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},
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nvueLeave() {
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if (!this.display) {
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return
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}
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const currentStyle = getStyle(this.mode)
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// 定义状态和事件
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this.status = 'leave'
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this.$emit('beforeLeave')
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// 合并样式
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this.viewStyle = currentStyle.leave
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// 放到promise中处理执行过程
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Promise.resolve()
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.then(nextTick) // 等待几十ms
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.then(() => {
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this.transitionEnded = false
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// 动画正在离场的状态
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this.$emit('leave')
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animation.transition(this.$refs['u-transition'].ref, {
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styles: currentStyle['leave-to'],
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duration: this.duration,
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timingFunction: this.timingFunction,
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needLayout: false,
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delay: 0
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}, () => {
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this.onTransitionEnd()
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})
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})
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.catch(() => {})
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},
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// #endif
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// 完成过渡后触发
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onTransitionEnd() {
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// 如果已经是结束的状态，无需再处理
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if (this.transitionEnded) return
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this.transitionEnded = true
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// 发出组件动画执行后的事件
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this.$emit(this.status === 'leave' ? 'afterLeave' : 'afterEnter')
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if (!this.show && this.display) {
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this.display = false
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this.inited = false
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}
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}
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}
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}
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