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315 lines
9.6 KiB
315 lines
9.6 KiB
<template> |
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<view class=""> |
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<view class="u-navbar" :style="[navbarStyle]" :class="{ 'u-navbar-fixed': isFixed, 'u-border-bottom': borderBottom }"> |
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<view class="u-status-bar" :style="{ height: statusBarHeight + 'px' }"></view> |
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<view class="u-navbar-inner" :style="[navbarInnerStyle]"> |
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<view class="u-back-wrap" v-if="isBack" @tap="goBack"> |
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<view class="u-icon-wrap"> |
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<u-icon :name="backIconName" :color="backIconColor" :size="backIconSize"></u-icon> |
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</view> |
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<view class="u-icon-wrap u-back-text u-line-1" v-if="backText" :style="[backTextStyle]">{{ backText }}</view> |
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</view> |
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<view class="u-navbar-content-title" v-if="title" :style="[titleStyle]"> |
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<view |
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class="u-title u-line-1" |
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:style="{ |
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color: titleColor, |
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fontSize: titleSize + 'rpx', |
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fontWeight: titleBold ? 'bold' : 'normal' |
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}"> |
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{{ title }} |
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</view> |
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</view> |
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<view class="u-slot-content"> |
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<slot></slot> |
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</view> |
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<view class="u-slot-right"> |
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<slot name="right"></slot> |
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</view> |
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</view> |
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</view> |
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<!-- 解决fixed定位后导航栏塌陷的问题 --> |
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<view class="u-navbar-placeholder" v-if="isFixed && !immersive" :style="{ width: '100%', height: Number(navbarHeight) + statusBarHeight + 'px' }"></view> |
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</view> |
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</template> |
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<script> |
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// 获取系统状态栏的高度 |
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let systemInfo = uni.getSystemInfoSync(); |
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let menuButtonInfo = {}; |
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// 如果是小程序,获取右上角胶囊的尺寸信息,避免导航栏右侧内容与胶囊重叠(支付宝小程序非本API,尚未兼容) |
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// #ifdef MP-WEIXIN || MP-BAIDU || MP-TOUTIAO || MP-QQ |
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menuButtonInfo = uni.getMenuButtonBoundingClientRect(); |
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// #endif |
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/** |
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* navbar 自定义导航栏 |
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* @description 此组件一般用于在特殊情况下,需要自定义导航栏的时候用到,一般建议使用uniapp自带的导航栏。 |
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* @tutorial https://www.uviewui.com/components/navbar.html |
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* @property {String Number} height 导航栏高度(不包括状态栏高度在内,内部自动加上),注意这里的单位是px(默认44) |
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* @property {String} back-icon-color 左边返回图标的颜色(默认#606266) |
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* @property {String} back-icon-name 左边返回图标的名称,只能为uView自带的图标(默认arrow-left) |
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* @property {String Number} back-icon-size 左边返回图标的大小,单位rpx(默认30) |
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* @property {String} back-text 返回图标右边的辅助提示文字 |
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* @property {Object} back-text-style 返回图标右边的辅助提示文字的样式,对象形式(默认{ color: '#606266' }) |
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* @property {String} title 导航栏标题,如设置为空字符,将会隐藏标题占位区域 |
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* @property {String Number} title-width 导航栏标题的最大宽度,内容超出会以省略号隐藏,单位rpx(默认250) |
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* @property {String} title-color 标题的颜色(默认#606266) |
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* @property {String Number} title-size 导航栏标题字体大小,单位rpx(默认32) |
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* @property {Function} custom-back 自定义返回逻辑方法 |
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* @property {String Number} z-index 固定在顶部时的z-index值(默认980) |
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* @property {Boolean} is-back 是否显示导航栏左边返回图标和辅助文字(默认true) |
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* @property {Object} background 导航栏背景设置,见官网说明(默认{ background: '#ffffff' }) |
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* @property {Boolean} is-fixed 导航栏是否固定在顶部(默认true) |
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* @property {Boolean} immersive 沉浸式,允许fixed定位后导航栏塌陷,仅fixed定位下生效(默认false) |
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* @property {Boolean} border-bottom 导航栏底部是否显示下边框,如定义了较深的背景颜色,可取消此值(默认true) |
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* @example <u-navbar back-text="返回" title="剑未配妥,出门已是江湖"></u-navbar> |
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*/ |
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export default { |
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name: "u-navbar", |
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props: { |
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// 导航栏高度,单位px,非rpx |
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height: { |
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type: [String, Number], |
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default: '' |
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}, |
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// 返回箭头的颜色 |
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backIconColor: { |
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type: String, |
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default: '#606266' |
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}, |
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// 左边返回的图标 |
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backIconName: { |
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type: String, |
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default: 'nav-back' |
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}, |
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// 左边返回图标的大小,rpx |
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backIconSize: { |
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type: [String, Number], |
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default: '44' |
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}, |
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// 返回的文字提示 |
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backText: { |
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type: String, |
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default: '' |
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}, |
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// 返回的文字的 样式 |
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backTextStyle: { |
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type: Object, |
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default () { |
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return { |
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color: '#606266' |
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} |
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} |
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}, |
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// 导航栏标题 |
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title: { |
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type: String, |
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default: '' |
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}, |
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// 标题的宽度,如果需要自定义右侧内容,且右侧内容很多时,可能需要减少这个宽度,单位rpx |
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titleWidth: { |
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type: [String, Number], |
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default: '250' |
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}, |
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// 标题的颜色 |
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titleColor: { |
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type: String, |
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default: '#606266' |
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}, |
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// 标题字体是否加粗 |
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titleBold: { |
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type: Boolean, |
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default: false |
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}, |
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// 标题的字体大小 |
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titleSize: { |
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type: [String, Number], |
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default: 32 |
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}, |
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isBack: { |
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type: [Boolean, String], |
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default: true |
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}, |
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// 对象形式,因为用户可能定义一个纯色,或者线性渐变的颜色 |
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background: { |
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type: Object, |
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default () { |
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return { |
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background: '#ffffff' |
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} |
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} |
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}, |
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// 导航栏是否固定在顶部 |
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isFixed: { |
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type: Boolean, |
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default: true |
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}, |
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// 是否沉浸式,允许fixed定位后导航栏塌陷,仅fixed定位下生效 |
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immersive: { |
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type: Boolean, |
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default: false |
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}, |
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// 是否显示导航栏的下边框 |
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borderBottom: { |
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type: Boolean, |
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default: true |
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}, |
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zIndex: { |
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type: [String, Number], |
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default: '' |
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}, |
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// 自定义返回逻辑 |
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customBack: { |
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type: Function, |
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default: null |
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} |
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}, |
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data() { |
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return { |
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menuButtonInfo: menuButtonInfo, |
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statusBarHeight: systemInfo.statusBarHeight |
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}; |
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}, |
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computed: { |
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// 导航栏内部盒子的样式 |
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navbarInnerStyle() { |
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let style = {}; |
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// 导航栏宽度,如果在小程序下,导航栏宽度为胶囊的左边到屏幕左边的距离 |
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style.height = this.navbarHeight + 'px'; |
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// // 如果是各家小程序,导航栏内部的宽度需要减少右边胶囊的宽度 |
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// #ifdef MP |
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let rightButtonWidth = systemInfo.windowWidth - menuButtonInfo.left; |
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style.marginRight = rightButtonWidth + 'px'; |
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// #endif |
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return style; |
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}, |
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// 整个导航栏的样式 |
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navbarStyle() { |
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let style = {}; |
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style.zIndex = this.zIndex ? this.zIndex : this.$u.zIndex.navbar; |
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// 合并用户传递的背景色对象 |
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Object.assign(style, this.background); |
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return style; |
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}, |
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// 导航中间的标题的样式 |
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titleStyle() { |
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let style = {}; |
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// #ifndef MP |
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style.left = (systemInfo.windowWidth - uni.upx2px(this.titleWidth)) / 2 + 'px'; |
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style.right = (systemInfo.windowWidth - uni.upx2px(this.titleWidth)) / 2 + 'px'; |
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// #endif |
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// #ifdef MP |
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// 此处是为了让标题显示区域即使在小程序有右侧胶囊的情况下也能处于屏幕的中间,是通过绝对定位实现的 |
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let rightButtonWidth = systemInfo.windowWidth - menuButtonInfo.left; |
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style.left = (systemInfo.windowWidth - uni.upx2px(this.titleWidth)) / 2 + 'px'; |
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style.right = rightButtonWidth - (systemInfo.windowWidth - uni.upx2px(this.titleWidth)) / 2 + rightButtonWidth + |
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'px'; |
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// #endif |
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style.width = uni.upx2px(this.titleWidth) + 'px'; |
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return style; |
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}, |
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// 转换字符数值为真正的数值 |
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navbarHeight() { |
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// #ifdef APP-PLUS || H5 |
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return this.height ? this.height : 44; |
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// #endif |
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// #ifdef MP |
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// 小程序特别处理,让导航栏高度 = 胶囊高度 + 两倍胶囊顶部与状态栏底部的距离之差(相当于同时获得了导航栏底部与胶囊底部的距离) |
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// 此方法有缺陷,暂不用(会导致少了几个px),采用直接固定值的方式 |
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// return menuButtonInfo.height + (menuButtonInfo.top - this.statusBarHeight) * 2;//导航高度 |
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let height = systemInfo.platform == 'ios' ? 44 : 48; |
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return this.height ? this.height : height; |
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// #endif |
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} |
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}, |
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created() {}, |
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methods: { |
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goBack() { |
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// 如果自定义了点击返回按钮的函数,则执行,否则执行返回逻辑 |
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if (typeof this.customBack === 'function') { |
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// 在微信,支付宝等环境(H5正常),会导致父组件定义的customBack()函数体中的this变成子组件的this |
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// 通过bind()方法,绑定父组件的this,让this.customBack()的this为父组件的上下文 |
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this.customBack.bind(this.$u.$parent.call(this))(); |
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} else { |
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uni.navigateBack(); |
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} |
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} |
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} |
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}; |
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</script> |
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<style scoped lang="scss"> |
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@import "../../libs/css/style.components.scss"; |
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.u-navbar { |
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width: 100%; |
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} |
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.u-navbar-fixed { |
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position: fixed; |
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left: 0; |
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right: 0; |
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top: 0; |
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z-index: 991; |
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} |
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.u-status-bar { |
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width: 100%; |
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} |
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.u-navbar-inner { |
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@include vue-flex; |
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justify-content: space-between; |
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position: relative; |
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align-items: center; |
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} |
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.u-back-wrap { |
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@include vue-flex; |
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align-items: center; |
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flex: 1; |
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flex-grow: 0; |
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padding: 14rpx 14rpx 14rpx 24rpx; |
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} |
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.u-back-text { |
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padding-left: 4rpx; |
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font-size: 30rpx; |
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} |
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.u-navbar-content-title { |
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@include vue-flex; |
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align-items: center; |
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justify-content: center; |
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flex: 1; |
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position: absolute; |
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left: 0; |
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right: 0; |
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height: 60rpx; |
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text-align: center; |
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flex-shrink: 0; |
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} |
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.u-navbar-centent-slot { |
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flex: 1; |
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} |
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.u-title { |
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line-height: 60rpx; |
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font-size: 32rpx; |
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flex: 1; |
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} |
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.u-navbar-right { |
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flex: 1; |
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@include vue-flex; |
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align-items: center; |
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justify-content: flex-end; |
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} |
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.u-slot-content { |
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flex: 1; |
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@include vue-flex; |
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align-items: center; |
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} |
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</style>
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