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node_modules/uview-ui/components/u-mask/u-mask.vue 3.11 KB
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  <template>
  	<view class="u-mask" hover-stop-propagation :style="[maskStyle, zoomStyle]" @tap="click" @touchmove.stop.prevent="() => {}" :class="{
  		'u-mask-zoom': zoom,
  		'u-mask-show': show
  	}">
  		<slot />
  	</view>
  </template>
  
  <script>
  	/**
  	 * mask 遮罩
  	 * @description 创建一个遮罩层,用于强调特定的页面元素,并阻止用户对遮罩下层的内容进行操作,一般用于弹窗场景
  	 * @tutorial https://www.uviewui.com/components/mask.html
  	 * @property {Boolean} show 是否显示遮罩(默认false
  	 * @property {String Number} z-index z-index 层级(默认1070
  	 * @property {Object} custom-style 自定义样式对象,见上方说明
  	 * @property {String Number} duration 动画时长,单位毫秒(默认300
  	 * @property {Boolean} zoom 是否使用scale对遮罩进行缩放(默认true
  	 * @property {Boolean} mask-click-able 遮罩是否可点击,为false时点击不会发送click事件(默认true
  	 * @event {Function} click mask-click-able为true时,点击遮罩发送此事件
  	 * @example <u-mask :show="show" @click="show = false"></u-mask>
  	 */
  	export default {
  		name: "u-mask",
  		props: {
  			// 是否显示遮罩
  			show: {
  				type: Boolean,
  				default: false
  			},
  			// 层级z-index
  			zIndex: {
  				type: [Number, String],
  				default: ''
  			},
  			// 用户自定义样式
  			customStyle: {
  				type: Object,
  				default () {
  					return {}
  				}
  			},
  			// 遮罩的动画样式, 是否使用使用zoom进行scale进行缩放
  			zoom: {
  				type: Boolean,
  				default: true
  			},
  			// 遮罩的过渡时间,单位为ms
  			duration: {
  				type: [Number, String],
  				default: 300
  			},
  			// 是否可以通过点击遮罩进行关闭
  			maskClickAble: {
  				type: Boolean,
  				default: true
  			}
  		},
  		data() {
  			return {
  				zoomStyle: {
  					transform: ''
  				},
  				scale: 'scale(1.2, 1.2)'
  			}
  		},
  		watch: {
  			show(n) {
  				if(n && this.zoom) {
  					// 当展示遮罩的时候,设置scale为1,达到缩小(原来为1.2)的效果
  					this.zoomStyle.transform = 'scale(1, 1)';
  				} else if(!n && this.zoom) {
  					// 当隐藏遮罩的时候,设置scale为1.2,达到放大(因为显示遮罩时已重置为1)的效果
  					this.zoomStyle.transform = this.scale;
  				}
  			}
  		},
  		computed: {
  			maskStyle() {
  				let style = {};
  				style.backgroundColor = "rgba(0, 0, 0, 0.6)";
  				if(this.show) style.zIndex = this.zIndex ? this.zIndex : this.$u.zIndex.mask;
  				else style.zIndex = -1;
  				style.transition = `all ${this.duration / 1000}s ease-in-out`;
  				// 判断用户传递的对象是否为空,不为空就进行合并
  				if (Object.keys(this.customStyle).length) style = { 
  					...style,
  					...this.customStyle
  				};
  				return style;
  			}
  		},
  		methods: {
  			click() {
  				if (!this.maskClickAble) return;
  				this.$emit('click');
  			}
  		}
  	}
  </script>
  
  <style lang="scss" scoped>
  	@import "../../libs/css/style.components.scss";
  	
  	.u-mask {
  		position: fixed;
  		top: 0;
  		left: 0;
  		right: 0;
  		bottom: 0;
  		opacity: 0;
  		transition: transform 0.3s;
  	}
  
  	.u-mask-show {
  		opacity: 1;
  	}
  	
  	.u-mask-zoom {
  		transform: scale(1.2, 1.2);
  	}
  </style>