234 lines
		
	
	
		
			7.0 KiB
		
	
	
	
		
			Vue
		
	
	
			
		
		
	
	
			234 lines
		
	
	
		
			7.0 KiB
		
	
	
	
		
			Vue
		
	
	
| <template>
 | ||
|   <view class="u-tabbar-item" :style="[addStyle(customStyle)]">
 | ||
|     <view v-if="isCenter" class="tabbar-center-item">
 | ||
|       <image class="center-image" :src="centerImage" mode="aspectFill"></image>
 | ||
|     </view>
 | ||
|     <template v-else>
 | ||
|       <view class="u-tabbar-item__icon">
 | ||
|         <image
 | ||
|           v-if="icon"
 | ||
|           :name="icon"
 | ||
|           :color="isActive ? parentData.activeColor : parentData.inactiveColor"
 | ||
|           :size="20"
 | ||
|         ></image>
 | ||
|         <block v-else>
 | ||
|           <slot v-if="isActive" name="active-icon" />
 | ||
|           <slot v-else name="inactive-icon" />
 | ||
|         </block>
 | ||
|         <!-- <u-badge
 | ||
| 					absolute
 | ||
| 					:offset="[0, dot ? '34rpx' : badge > 9 ? '14rpx' : '20rpx']"
 | ||
| 					:customStyle="badgeStyle"
 | ||
| 					:isDot="dot"
 | ||
| 					:value="badge || (dot ? 1 : null)"
 | ||
| 					:show="dot || badge > 0"
 | ||
| 				></u-badge> -->
 | ||
|       </view>
 | ||
| 
 | ||
|       <slot name="text">
 | ||
|         <text
 | ||
|           class="u-tabbar-item__text"
 | ||
|           :style="{
 | ||
|             color: isActive ? parentData.activeColor : parentData.inactiveColor,
 | ||
|           }"
 | ||
|         >
 | ||
|           {{ text }}
 | ||
|         </text>
 | ||
|       </slot>
 | ||
|     </template>
 | ||
|   </view>
 | ||
| </template>
 | ||
| 
 | ||
| <script>
 | ||
|   /**
 | ||
|    * TabbarItem 底部导航栏子组件
 | ||
|    * @description 此组件提供了自定义tabbar的能力。
 | ||
|    * @property {String | Number}	name		item标签的名称,作为与u-tabbar的value参数匹配的标识符
 | ||
|    * @property {String}			icon		uView内置图标或者绝对路径的图片
 | ||
|    * @property {String | Number}	badge		右上角的角标提示信息
 | ||
|    * @property {Boolean}			dot			是否显示圆点,将会覆盖badge参数(默认 false )
 | ||
|    * @property {String}			text		描述文本
 | ||
|    * @property {Object | String}	badgeStyle	控制徽标的位置,对象或者字符串形式,可以设置top和right属性(默认 'top: 6px;right:2px;' )
 | ||
|    * @property {Object}			customStyle	定义需要用到的外部样式
 | ||
|    *
 | ||
|    */
 | ||
|   import { deepMerge, addStyle, sleep, $parent } from '@/sheep/helper';
 | ||
|   export default {
 | ||
|     name: 'su-tabbar-item',
 | ||
|     props: {
 | ||
|       customStyle: {
 | ||
|         type: [Object, String],
 | ||
|         default: () => ({}),
 | ||
|       },
 | ||
|       customClass: {
 | ||
|         type: String,
 | ||
|         default: '',
 | ||
|       },
 | ||
|       // 跳转的页面路径
 | ||
|       url: {
 | ||
|         type: String,
 | ||
|         default: '',
 | ||
|       },
 | ||
|       // 页面跳转的类型
 | ||
|       linkType: {
 | ||
|         type: String,
 | ||
|         default: 'navigateTo',
 | ||
|       },
 | ||
|       // item标签的名称,作为与u-tabbar的value参数匹配的标识符
 | ||
|       name: {
 | ||
|         type: [String, Number, null],
 | ||
|         default: '',
 | ||
|       },
 | ||
|       // uView内置图标或者绝对路径的图片
 | ||
|       icon: {
 | ||
|         icon: String,
 | ||
|         default: '',
 | ||
|       },
 | ||
|       // 右上角的角标提示信息
 | ||
|       badge: {
 | ||
|         type: [String, Number, null],
 | ||
|         default: '',
 | ||
|       },
 | ||
|       // 是否显示圆点,将会覆盖badge参数
 | ||
|       dot: {
 | ||
|         type: Boolean,
 | ||
|         default: false,
 | ||
|       },
 | ||
|       // 描述文本
 | ||
|       text: {
 | ||
|         type: String,
 | ||
|         default: '',
 | ||
|       },
 | ||
|       // 控制徽标的位置,对象或者字符串形式,可以设置top和right属性
 | ||
|       badgeStyle: {
 | ||
|         type: [Object, String],
 | ||
|         default: '',
 | ||
|       },
 | ||
|       isCenter: {
 | ||
|         type: Boolean,
 | ||
|         default: false,
 | ||
|       },
 | ||
|       centerImage: {
 | ||
|         type: String,
 | ||
|         default: '',
 | ||
|       },
 | ||
|     },
 | ||
|     data() {
 | ||
|       return {
 | ||
|         isActive: false, // 是否处于激活状态
 | ||
|         addStyle,
 | ||
|         parentData: {
 | ||
|           value: null,
 | ||
|           activeColor: '',
 | ||
|           inactiveColor: '',
 | ||
|         },
 | ||
|         parent: {},
 | ||
|       };
 | ||
|     },
 | ||
|     created() {
 | ||
|       this.init();
 | ||
|     },
 | ||
|     methods: {
 | ||
|       getParentData(parentName = '') {
 | ||
|         // 避免在created中去定义parent变量
 | ||
|         if (!this.parent) this.parent = {};
 | ||
|         // 这里的本质原理是,通过获取父组件实例(也即类似u-radio的父组件u-radio-group的this)
 | ||
|         // 将父组件this中对应的参数,赋值给本组件(u-radio的this)的parentData对象中对应的属性
 | ||
|         // 之所以需要这么做,是因为所有端中,头条小程序不支持通过this.parent.xxx去监听父组件参数的变化
 | ||
|         // 此处并不会自动更新子组件的数据,而是依赖父组件u-radio-group去监听data的变化,手动调用更新子组件的方法去重新获取
 | ||
|         this.parent = $parent.call(this, parentName);
 | ||
|         if (this.parent.children) {
 | ||
|           // 如果父组件的children不存在本组件的实例,才将本实例添加到父组件的children中
 | ||
|           this.parent.children.indexOf(this) === -1 && this.parent.children.push(this);
 | ||
|         }
 | ||
|         if (this.parent && this.parentData) {
 | ||
|           // 历遍parentData中的属性,将parent中的同名属性赋值给parentData
 | ||
|           Object.keys(this.parentData).map((key) => {
 | ||
|             this.parentData[key] = this.parent[key];
 | ||
|           });
 | ||
|         }
 | ||
|       },
 | ||
|       init() {
 | ||
|         // 支付宝小程序不支持provide/inject,所以使用这个方法获取整个父组件,在created定义,避免循环引用
 | ||
|         this.updateParentData();
 | ||
|         if (!this.parent) {
 | ||
|           console.log('u-tabbar-item必须搭配u-tabbar组件使用');
 | ||
|         }
 | ||
|         // 本子组件在u-tabbar的children数组中的索引
 | ||
|         const index = this.parent.children.indexOf(this);
 | ||
|         // 判断本组件的name(如果没有定义name,就用index索引)是否等于父组件的value参数
 | ||
|         this.isActive = (this.name.split('?')[0] || index) === this.parentData.value;
 | ||
|       },
 | ||
|       updateParentData() {
 | ||
|         // 此方法在mixin中
 | ||
|         this.getParentData('su-tabbar');
 | ||
|       },
 | ||
|       // 此方法将会被父组件u-tabbar调用
 | ||
|       updateFromParent() {
 | ||
|         // 重新初始化
 | ||
|         this.init();
 | ||
|       },
 | ||
|       clickHandler() {
 | ||
|         this.$nextTick(() => {
 | ||
|           const index = this.parent.children.indexOf(this);
 | ||
|           const name = this.name || index;
 | ||
|           // 点击的item为非激活的item才发出change事件
 | ||
|           if (name !== this.parent.value) {
 | ||
|             this.parent.$emit('change', name);
 | ||
|           }
 | ||
|           this.$emit('click', name);
 | ||
|         });
 | ||
|       },
 | ||
|     },
 | ||
|   };
 | ||
| </script>
 | ||
| 
 | ||
| <style lang="scss" scoped>
 | ||
|   .tabbar-center-item {
 | ||
|     height: 40px;
 | ||
|     width: 40px;
 | ||
|     display: flex;
 | ||
|     align-items: center;
 | ||
|     justify-content: center;
 | ||
|     border-radius: 50%;
 | ||
|     background-color: rebeccapurple;
 | ||
|     transform: scale(1.3) translateY(-6px);
 | ||
|     position: absolute;
 | ||
|     z-index: 2;
 | ||
| 
 | ||
|     .center-image {
 | ||
|       width: 25px;
 | ||
|       height: 25px;
 | ||
|     }
 | ||
|   }
 | ||
|   .u-tabbar-item {
 | ||
|     display: flex;
 | ||
|     flex-direction: column;
 | ||
|     align-items: center;
 | ||
|     justify-content: center;
 | ||
|     flex: 1;
 | ||
|     position: relative;
 | ||
|     z-index: 1;
 | ||
| 
 | ||
|     &__icon {
 | ||
|       display: flex;
 | ||
|       position: relative;
 | ||
|       width: 150rpx;
 | ||
|       justify-content: center;
 | ||
|     }
 | ||
| 
 | ||
|     &__text {
 | ||
|       margin-top: 2px;
 | ||
|       font-size: 12px;
 | ||
|       color: var(--textSize);
 | ||
|     }
 | ||
|   }
 | ||
| 
 | ||
|   /* #ifdef MP */
 | ||
|   // 由于小程序都使用shadow DOM形式实现,需要给影子宿主设置flex: 1才能让其撑开
 | ||
|   :host {
 | ||
|     flex: 1;
 | ||
|   }
 | ||
|   /* #endif */
 | ||
| </style>
 |