331 lines
		
	
	
		
			9.1 KiB
		
	
	
	
		
			Vue
		
	
	
	
			
		
		
	
	
			331 lines
		
	
	
		
			9.1 KiB
		
	
	
	
		
			Vue
		
	
	
	
| <template>
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| 	<view
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| 		class="u-notice"
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| 		@tap="clickHandler"
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| 	>
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| 		<slot name="icon">
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| 			<view
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| 				class="u-notice__left-icon"
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| 				v-if="icon"
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| 			>
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| 				<u-icon
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| 					:name="icon"
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| 					:color="color"
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| 					size="19"
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| 				></u-icon>
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| 			</view>
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| 		</slot>
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| 		<view
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| 			class="u-notice__content"
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| 			ref="u-notice__content"
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| 		>
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| 			<view
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| 				ref="u-notice__content__text"
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| 				class="u-notice__content__text"
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| 				:style="[animationStyle]"
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| 			>
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| 				<text
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| 					v-for="(item, index) in innerText"
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| 					:key="index"
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| 					:style="[textStyle]"
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| 				>{{item}}</text>
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| 			</view>
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| 		</view>
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| 		<view
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| 			class="u-notice__right-icon"
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| 			v-if="['link', 'closable'].includes(mode)"
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| 		>
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| 			<u-icon
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| 				v-if="mode === 'link'"
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| 				name="arrow-right"
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| 				:size="17"
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| 				:color="color"
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| 			></u-icon>
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| 			<u-icon
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| 				v-if="mode === 'closable'"
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| 				@click="close"
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| 				name="close"
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| 				:size="16"
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| 				:color="color"
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| 			></u-icon>
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| 		</view>
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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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| 	// #ifdef APP-NVUE
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| 	const animation = uni.requireNativePlugin('animation')
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| 	const dom = uni.requireNativePlugin('dom')
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| 	// #endif
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| 	/**
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| 	 * RowNotice 滚动通知中的水平滚动模式
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| 	 * @description 水平滚动
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| 	 * @tutorial https://www.uviewui.com/components/noticeBar.html
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| 	 * @property {String | Number}	text			显示的内容,字符串
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| 	 * @property {String}			icon			是否显示左侧的音量图标 (默认 'volume' )
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| 	 * @property {String}			mode			通告模式,link-显示右箭头,closable-显示右侧关闭图标
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| 	 * @property {String}			color			文字颜色,各图标也会使用文字颜色 (默认 '#f9ae3d' )
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| 	 * @property {String}			bgColor			背景颜色 (默认 ''#fdf6ec' )
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| 	 * @property {String | Number}	fontSize		字体大小,单位px (默认 14 )
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| 	 * @property {String | Number}	speed			水平滚动时的滚动速度,即每秒滚动多少px(rpx),这有利于控制文字无论多少时,都能有一个恒定的速度  (默认 80 )
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| 	 * 
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| 	 * @event {Function} click 点击通告文字触发
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| 	 * @event {Function} close 点击右侧关闭图标触发
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| 	 * @example 
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| 	 */
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| 	export default {
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| 		name: 'u-row-notice',
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| 		mixins: [uni.$u.mpMixin, uni.$u.mixin,props],
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| 		data() {
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| 			return {
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| 				animationDuration: '0', // 动画执行时间
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| 				animationPlayState: 'paused', // 动画的开始和结束执行
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| 				// nvue下,内容发生变化,导致滚动宽度也变化,需要标志为是否需要重新计算宽度
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| 				// 不能在内容变化时直接重新计算,因为nvue的animation模块上一次的滚动不是刚好结束,会有影响
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| 				nvueInit: true,
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| 				show: true
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| 			};
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| 		},
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| 		watch: {
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| 			text: {
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| 				immediate: true,
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| 				handler(newValue, oldValue) {
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| 					// #ifdef APP-NVUE
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| 					this.nvueInit = true
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| 					// #endif
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| 					// #ifndef APP-NVUE
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| 					this.vue()
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| 					// #endif
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| 					
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| 					if(!uni.$u.test.string(newValue)) {
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| 						uni.$u.error('noticebar组件direction为row时,要求text参数为字符串形式')
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| 					}
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| 				}
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| 			},
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| 			fontSize() {
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| 				// #ifdef APP-NVUE
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| 				this.nvueInit = true
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| 				// #endif
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| 				// #ifndef APP-NVUE
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| 				this.vue()
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| 				// #endif
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| 			},
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| 			speed() {
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| 				// #ifdef APP-NVUE
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| 				this.nvueInit = true
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| 				// #endif
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| 				// #ifndef APP-NVUE
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| 				this.vue()
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| 				// #endif
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| 			}
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| 		},
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| 		computed: {
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| 			// 文字内容的样式
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| 			textStyle() {
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| 				let style = {}
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| 				style.color = this.color
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| 				style.fontSize = uni.$u.addUnit(this.fontSize)
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| 				return style
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| 			},
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| 			animationStyle() {
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| 				let style = {}
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| 				style.animationDuration = this.animationDuration
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| 				style.animationPlayState = this.animationPlayState
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| 				return style
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| 			},
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| 			// 内部对用户传入的数据进一步分割,放到多个text标签循环,否则如果用户传入的字符串很长(100个字符以上)
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| 			// 放在一个text标签中进行滚动,在低端安卓机上,动画可能会出现抖动现象,需要分割到多个text中可解决此问题
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| 			innerText() {
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| 				let result = [],
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| 					// 每组text标签的字符长度
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| 					len = 20
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| 				const textArr = this.text.split('')
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| 				for (let i = 0; i < textArr.length; i += len) {
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| 					// 对拆分的后的text进行slice分割,得到的为数组再进行join拼接为字符串
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| 					result.push(textArr.slice(i, i + len).join(''))
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| 				}
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| 				return result
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| 			}
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| 		},
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| 		mounted() {
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| 			// #ifdef APP-PLUS
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| 			// 在APP上(含nvue),监听当前webview是否处于隐藏状态(进入下一页时即为hide状态)
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| 			// 如果webivew隐藏了,为了节省性能的损耗,应停止动画的执行,同时也是为了保持进入下一页返回后,滚动位置保持不变
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| 			var pages = getCurrentPages()
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| 			var page = pages[pages.length - 1]
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| 			var currentWebview = page.$getAppWebview()
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| 			currentWebview.addEventListener('hide', () => {
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| 				this.webviewHide = true
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| 			})
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| 			currentWebview.addEventListener('show', () => {
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| 				this.webviewHide = false
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| 			})
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| 			// #endif
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| 
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| 			this.init()
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| 		},
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| 		methods: {
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| 			init() {
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| 				// #ifdef APP-NVUE
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| 				this.nvue()
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| 				// #endif
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| 
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| 				// #ifndef APP-NVUE
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| 				this.vue()
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| 				// #endif
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| 				
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| 				if(!uni.$u.test.string(this.text)) {
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| 					uni.$u.error('noticebar组件direction为row时,要求text参数为字符串形式')
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| 				}
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| 			},
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| 			// vue版处理
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| 			async vue() {
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| 				// #ifndef APP-NVUE
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| 				let boxWidth = 0,
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| 					textWidth = 0
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| 				// 进行一定的延时
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| 				await uni.$u.sleep()
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| 				// 查询盒子和文字的宽度
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| 				textWidth = (await this.$uGetRect('.u-notice__content__text')).width
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| 				boxWidth = (await this.$uGetRect('.u-notice__content')).width
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| 				// 根据t=s/v(时间=路程/速度),这里为何不需要加上#u-notice-box的宽度,因为中设置了.u-notice-content样式中设置了padding-left: 100%
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| 				// 恰巧计算出来的结果中已经包含了#u-notice-box的宽度
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| 				this.animationDuration = `${textWidth / uni.$u.getPx(this.speed)}s`
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| 				// 这里必须这样开始动画,否则在APP上动画速度不会改变
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| 				this.animationPlayState = 'paused'
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| 				setTimeout(() => {
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| 					this.animationPlayState = 'running'
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| 				}, 10)
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| 				// #endif
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| 			},
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| 			// nvue版处理
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| 			async nvue() {
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| 				// #ifdef APP-NVUE
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| 				this.nvueInit = false
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| 				let boxWidth = 0,
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| 					textWidth = 0
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| 				// 进行一定的延时
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| 				await uni.$u.sleep()
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| 				// 查询盒子和文字的宽度
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| 				textWidth = (await this.getNvueRect('u-notice__content__text')).width
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| 				boxWidth = (await this.getNvueRect('u-notice__content')).width
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| 				// 将文字移动到盒子的右边沿,之所以需要这么做,是因为nvue不支持100%单位,否则可以通过css设置
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| 				animation.transition(this.$refs['u-notice__content__text'], {
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| 					styles: {
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| 						transform: `translateX(${boxWidth}px)`
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| 					},
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| 				}, () => {
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| 					// 如果非禁止动画,则开始滚动
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| 					!this.stopAnimation && this.loopAnimation(textWidth, boxWidth)
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| 				});
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| 				// #endif
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| 			},
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| 			loopAnimation(textWidth, boxWidth) {
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| 				// #ifdef APP-NVUE
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| 				animation.transition(this.$refs['u-notice__content__text'], {
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| 					styles: {
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| 						// 目标移动终点为-textWidth,也即当文字的最右边贴到盒子的左边框的位置
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| 						transform: `translateX(-${textWidth}px)`
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| 					},
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| 					// 滚动时间的计算为,时间 = 路程(boxWidth + textWidth) / 速度,最后转为毫秒
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| 					duration: (boxWidth + textWidth) / uni.$u.getPx(this.speed) * 1000,
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| 					delay: 10
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| 				}, () => {
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| 					animation.transition(this.$refs['u-notice__content__text'], {
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| 						styles: {
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| 							// 重新将文字移动到盒子的右边沿
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| 							transform: `translateX(${this.stopAnimation ? 0 : boxWidth}px)`
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| 						},
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| 					}, () => {
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| 						// 如果非禁止动画,则继续下一轮滚动
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| 						if (!this.stopAnimation) {
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| 							// 判断是否需要初始化计算尺寸
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| 							if (this.nvueInit) {
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| 								this.nvue()
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| 							} else {
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| 								this.loopAnimation(textWidth, boxWidth)
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| 							}
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| 						}
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| 					});
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| 				})
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| 				// #endif
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| 			},
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| 			getNvueRect(el) {
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| 				// #ifdef APP-NVUE
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| 				// 返回一个promise
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| 				return new Promise(resolve => {
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| 					dom.getComponentRect(this.$refs[el], (res) => {
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| 						resolve(res.size)
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| 					})
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| 				})
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| 				// #endif
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| 			},
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| 			// 点击通告栏
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| 			clickHandler(index) {
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| 				this.$emit('click')
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| 			},
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| 			// 点击右侧按钮,需要判断点击的是关闭图标还是箭头图标
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| 			close() {
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| 				this.$emit('close')
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| 			}
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| 		},
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| 		// #ifdef APP-NVUE
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| 		beforeDestroy() {
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| 			this.stopAnimation = true
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| 		},
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| 		// #endif
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| 	};
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| </script>
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| 
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| <style lang="scss" scoped>
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| 	@import "../../libs/css/components.scss";
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| 
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| 	.u-notice {
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| 		@include flex;
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| 		align-items: center;
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| 		justify-content: space-between;
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| 
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| 		&__left-icon {
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| 			align-items: center;
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| 			margin-right: 5px;
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| 		}
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| 
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| 		&__right-icon {
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| 			margin-left: 5px;
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| 			align-items: center;
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| 		}
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| 
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| 		&__content {
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| 			text-align: right;
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| 			flex: 1;
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| 			@include flex;
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| 			flex-wrap: nowrap;
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| 			overflow: hidden;
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| 
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| 			&__text {
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| 				font-size: 14px;
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| 				color: $u-warning;
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| 				/* #ifndef APP-NVUE */
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| 				// 这一句很重要,为了能让滚动左右连接起来
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| 				padding-left: 100%;
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| 				word-break: keep-all;
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| 				white-space: nowrap;
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| 				animation: u-loop-animation 10s linear infinite both;
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| 				/* #endif */
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| 				@include flex(row);
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| 			}
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| 		}
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| 
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| 	}
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| 
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| 	@keyframes u-loop-animation {
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| 		0% {
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| 			transform: translate3d(0, 0, 0);
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| 		}
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| 
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| 		100% {
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| 			transform: translate3d(-100%, 0, 0);
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| 		}
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| 	}
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| </style>
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