158 lines
		
	
	
		
			6.1 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
			
		
		
	
	
			158 lines
		
	
	
		
			6.1 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
| // 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
 | ||
| const nextTick = () => new Promise(resolve => setTimeout(resolve, 1000 / 50))
 | ||
| // nvue动画模块实现细节抽离在外部文件
 | ||
| import animationMap from './nvue.ani-map.js'
 | ||
| 
 | ||
| // #ifndef APP-NVUE
 | ||
| // 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
 | ||
| const getClassNames = (name) => ({
 | ||
|     enter: `u-${name}-enter u-${name}-enter-active`,
 | ||
|     'enter-to': `u-${name}-enter-to u-${name}-enter-active`,
 | ||
|     leave: `u-${name}-leave u-${name}-leave-active`,
 | ||
|     'leave-to': `u-${name}-leave-to u-${name}-leave-active`
 | ||
| })
 | ||
| // #endif
 | ||
| 
 | ||
| // #ifdef APP-NVUE
 | ||
| // 引入nvue(weex)的animation动画模块,文档见:
 | ||
| // https://weex.apache.org/zh/docs/modules/animation.html#transition
 | ||
| const animation = uni.requireNativePlugin('animation')
 | ||
| const getStyle = (name) => animationMap[name]
 | ||
| // #endif
 | ||
| 
 | ||
| export default {
 | ||
|     methods: {
 | ||
|         // 组件被点击发出事件
 | ||
|         clickHandler() {
 | ||
|             this.$emit('click')
 | ||
|         },
 | ||
|         // #ifndef APP-NVUE
 | ||
|         // vue版本的组件进场处理
 | ||
|          vueEnter() {
 | ||
|             // 动画进入时的类名
 | ||
|             const classNames = getClassNames(this.mode)
 | ||
|             // 定义状态和发出动画进入前事件
 | ||
|             this.status = 'enter'
 | ||
|             this.$emit('beforeEnter')
 | ||
|             this.inited = true
 | ||
|             this.display = true
 | ||
|             this.classes = classNames.enter
 | ||
|             this.$nextTick(async () => {
 | ||
| 				// #ifdef H5
 | ||
| 				await uni.$u.sleep(20)
 | ||
| 				// #endif
 | ||
|                 // 标识动画尚未结束
 | ||
|                 this.$emit('enter')
 | ||
|                 this.transitionEnded = false
 | ||
| 				// 组件动画进入后触发的事件
 | ||
|                 this.$emit('afterEnter')
 | ||
|                 // 赋予组件enter-to类名
 | ||
|                 this.classes = classNames['enter-to']
 | ||
|             })
 | ||
|         },
 | ||
|         // 动画离场处理
 | ||
|         vueLeave() {
 | ||
|             // 如果不是展示状态,无需执行逻辑
 | ||
|             if (!this.display) return
 | ||
|             const classNames = getClassNames(this.mode)
 | ||
|             // 标记离开状态和发出事件
 | ||
|             this.status = 'leave'
 | ||
|             this.$emit('beforeLeave')
 | ||
|             // 获得类名
 | ||
|             this.classes = classNames.leave
 | ||
| 
 | ||
|             this.$nextTick(() => {
 | ||
|                // 动画正在离场的状态
 | ||
|                this.transitionEnded = false
 | ||
|                this.$emit('leave')
 | ||
|                 // 组件执行动画,到了执行的执行时间后,执行一些额外处理
 | ||
|                 setTimeout(this.onTransitionEnd, this.duration)
 | ||
|                 this.classes = classNames['leave-to']
 | ||
|             })
 | ||
|         },
 | ||
|         // #endif
 | ||
|         // #ifdef APP-NVUE
 | ||
|         // nvue版本动画进场
 | ||
|         nvueEnter() {
 | ||
|             // 获得样式的名称
 | ||
|             const currentStyle = getStyle(this.mode)
 | ||
|             // 组件动画状态和发出事件
 | ||
|             this.status = 'enter'
 | ||
|             this.$emit('beforeEnter')
 | ||
|             // 展示生成组件元素
 | ||
|             this.inited = true
 | ||
|             this.display = true
 | ||
|             // 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
 | ||
|             // 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
 | ||
|             this.viewStyle = {
 | ||
|                 opacity: 0
 | ||
|             }
 | ||
|             // 等待弹窗内容渲染完成
 | ||
|             this.$nextTick(() => {
 | ||
|                 // 合并样式
 | ||
|                 this.viewStyle = currentStyle.enter
 | ||
|                 Promise.resolve()
 | ||
|                     .then(nextTick)
 | ||
|                     .then(() => {
 | ||
|                         // 组件开始进入前的事件
 | ||
|                         this.$emit('enter')
 | ||
|                         // 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.$refs['u-transition']用法
 | ||
|                         animation.transition(this.$refs['u-transition'].ref, {
 | ||
|                             styles: currentStyle['enter-to'],
 | ||
|                             duration: this.duration,
 | ||
|                             timingFunction: this.timingFunction,
 | ||
|                             needLayout: false,
 | ||
|                             delay: 0
 | ||
|                         }, () => {
 | ||
|                             // 动画执行完毕,发出事件
 | ||
|                             this.$emit('afterEnter')
 | ||
|                         })
 | ||
|                     })
 | ||
|                     .catch(() => {})
 | ||
|             })
 | ||
|         },
 | ||
|         nvueLeave() {
 | ||
|             if (!this.display) {
 | ||
|                 return
 | ||
|             }
 | ||
|             const currentStyle = getStyle(this.mode)
 | ||
|             // 定义状态和事件
 | ||
|             this.status = 'leave'
 | ||
|             this.$emit('beforeLeave')
 | ||
|             // 合并样式
 | ||
|             this.viewStyle = currentStyle.leave
 | ||
|             // 放到promise中处理执行过程
 | ||
|             Promise.resolve()
 | ||
|                 .then(nextTick) // 等待几十ms
 | ||
|                 .then(() => {
 | ||
|                     this.transitionEnded = false
 | ||
|                     // 动画正在离场的状态
 | ||
|                     this.$emit('leave')
 | ||
|                     animation.transition(this.$refs['u-transition'].ref, {
 | ||
|                         styles: currentStyle['leave-to'],
 | ||
|                         duration: this.duration,
 | ||
|                         timingFunction: this.timingFunction,
 | ||
|                         needLayout: false,
 | ||
|                         delay: 0
 | ||
|                     }, () => {
 | ||
|                         this.onTransitionEnd()
 | ||
|                     })
 | ||
|                 })
 | ||
|                 .catch(() => {})
 | ||
|         },
 | ||
|         // #endif
 | ||
|         // 完成过渡后触发
 | ||
|         onTransitionEnd() {
 | ||
|             // 如果已经是结束的状态,无需再处理
 | ||
|             if (this.transitionEnded) return
 | ||
|             this.transitionEnded = true
 | ||
|             // 发出组件动画执行后的事件
 | ||
|             this.$emit(this.status === 'leave' ? 'afterLeave' : 'afterEnter')
 | ||
|             if (!this.show && this.display) {
 | ||
|                 this.display = false
 | ||
|                 this.inited = false
 | ||
|             }
 | ||
|         }
 | ||
|     }
 | ||
| }
 |