blob: b6e7e819e3c859738823c71c42991e4a1f888871 [file] [log] [blame]
guangchao.xu070005a2020-12-07 09:56:40 +08001<template>
2 <view class="u-swiper-wrap" :style="{
3 borderRadius: `${borderRadius}rpx`
4 }">
5 <swiper :current="elCurrent" @change="change" @animationfinish="animationfinish" :interval="interval" :circular="circular" :duration="duration" :autoplay="autoplay"
6 :previous-margin="effect3d ? effect3dPreviousMargin + 'rpx' : '0'" :next-margin="effect3d ? effect3dPreviousMargin + 'rpx' : '0'"
7 :style="{
8 height: height + 'rpx',
9 backgroundColor: bgColor
10 }">
11 <swiper-item class="u-swiper-item" v-for="(item, index) in list" :key="index">
12 <view class="u-list-image-wrap" @tap.stop.prevent="listClick(index)" :class="[uCurrent != index ? 'u-list-scale' : '']" :style="{
13 borderRadius: `${borderRadius}rpx`,
14 transform: effect3d && uCurrent != index ? 'scaleY(0.9)' : 'scaleY(1)',
15 margin: effect3d && uCurrent != index ? '0 20rpx' : 0,
16 }">
17 <image class="u-swiper-image" :src="item[name] || item" :mode="imgMode"></image>
18 <view v-if="title && item.title" class="u-swiper-title u-line-1" :style="[{
19 'padding-bottom': titlePaddingBottom
20 }, titleStyle]">
21 {{ item.title }}
22 </view>
23 </view>
24 </swiper-item>
25 </swiper>
26 <view class="u-swiper-indicator" :style="{
27 top: indicatorPos == 'topLeft' || indicatorPos == 'topCenter' || indicatorPos == 'topRight' ? '12rpx' : 'auto',
28 bottom: indicatorPos == 'bottomLeft' || indicatorPos == 'bottomCenter' || indicatorPos == 'bottomRight' ? '12rpx' : 'auto',
29 justifyContent: justifyContent,
30 padding: `0 ${effect3d ? '74rpx' : '24rpx'}`
31 }">
32 <block v-if="mode == 'rect'">
33 <view class="u-indicator-item-rect" :class="{ 'u-indicator-item-rect-active': index == uCurrent }" v-for="(item, index) in list"
34 :key="index"></view>
35 </block>
36 <block v-if="mode == 'dot'">
37 <view class="u-indicator-item-dot" :class="{ 'u-indicator-item-dot-active': index == uCurrent }" v-for="(item, index) in list"
38 :key="index"></view>
39 </block>
40 <block v-if="mode == 'round'">
41 <view class="u-indicator-item-round" :class="{ 'u-indicator-item-round-active': index == uCurrent }" v-for="(item, index) in list"
42 :key="index"></view>
43 </block>
44 <block v-if="mode == 'number'">
45 <view class="u-indicator-item-number">{{ uCurrent + 1 }}/{{ list.length }}</view>
46 </block>
47 </view>
48 </view>
49</template>
50
51<script>
52 /**
53 * swiper 轮播图
54 * @description 该组件一般用于导航轮播,广告展示等场景,可开箱即用
55 * @tutorial https://www.uviewui.com/components/swiper.html
56 * @property {Array} list 轮播图数据,见官网"基本使用"说明
57 * @property {Boolean} title 是否显示标题文字,需要配合list参数,见官网说明(默认false)
58 * @property {String} mode 指示器模式,见官网说明(默认round)
59 * @property {String Number} height 轮播图组件高度,单位rpx(默认250)
60 * @property {String} indicator-pos 指示器的位置(默认bottomCenter)
61 * @property {Boolean} effect3d 是否开启3D效果(默认false)
62 * @property {Boolean} autoplay 是否自动播放(默认true)
63 * @property {String Number} interval 自动轮播时间间隔,单位ms(默认2500)
64 * @property {Boolean} circular 是否衔接播放,见官网说明(默认true)
65 * @property {String} bg-color 背景颜色(默认#f3f4f6)
66 * @property {String Number} border-radius 轮播图圆角值,单位rpx(默认8)
67 * @property {Object} title-style 自定义标题样式
68 * @property {String Number} effect3d-previous-margin mode = true模式的情况下,激活项与前后项之间的距离,单位rpx(默认50)
69 * @property {String} img-mode 图片的裁剪模式,详见image组件裁剪模式(默认aspectFill)
70 * @event {Function} click 点击轮播图时触发
71 * @example <u-swiper :list="list" mode="dot" indicator-pos="bottomRight"></u-swiper>
72 */
73 export default {
74 name: "u-swiper",
75 props: {
76 // 轮播图的数据,格式如:[{image: 'xxxx', title: 'xxxx'},{image: 'yyyy', title: 'yyyy'}],其中title字段可选
77 list: {
78 type: Array,
79 default () {
80 return [];
81 }
82 },
83 // 是否显示title标题
84 title: {
85 type: Boolean,
86 default: false
87 },
88 // 用户自定义的指示器的样式
89 indicator: {
90 type: Object,
91 default () {
92 return {};
93 }
94 },
95 // 圆角值
96 borderRadius: {
97 type: [Number, String],
98 default: 8
99 },
100 // 隔多久自动切换
101 interval: {
102 type: [String, Number],
103 default: 3000
104 },
105 // 指示器的模式,rect|dot|number|round
106 mode: {
107 type: String,
108 default: 'round'
109 },
110 // list的高度,单位rpx
111 height: {
112 type: [Number, String],
113 default: 250
114 },
115 // 指示器的位置,topLeft|topCenter|topRight|bottomLeft|bottomCenter|bottomRight
116 indicatorPos: {
117 type: String,
118 default: 'bottomCenter'
119 },
120 // 是否开启缩放效果
121 effect3d: {
122 type: Boolean,
123 default: false
124 },
125 // 3D模式的情况下,激活item与前后item之间的距离,单位rpx
126 effect3dPreviousMargin: {
127 type: [Number, String],
128 default: 50
129 },
130 // 是否自动播放
131 autoplay: {
132 type: Boolean,
133 default: true
134 },
135 // 自动轮播时间间隔,单位ms
136 duration: {
137 type: [Number, String],
138 default: 500
139 },
140 // 是否衔接滑动,即到最后一张时接着滑动,是否自动切换到第一张
141 circular: {
142 type: Boolean,
143 default: true
144 },
145 // 图片的裁剪模式
146 imgMode: {
147 type: String,
148 default: 'aspectFill'
149 },
150 // 从list数组中读取的图片的属性名
151 name: {
152 type: String,
153 default: 'image'
154 },
155 // 背景颜色
156 bgColor: {
157 type: String,
158 default: '#f3f4f6'
159 },
160 // 初始化时,默认显示第几项
161 current: {
162 type: [Number, String],
163 default: 0
164 },
165 // 标题的样式,对象形式
166 titleStyle: {
167 type: Object,
168 default() {
169 return {}
170 }
171 }
172 },
173 watch: {
174 // 如果外部的list发生变化,判断长度是否被修改,如果前后长度不一致,重置uCurrent值,避免溢出
175 list(nVal, oVal) {
176 if(nVal.length !== oVal.length) this.uCurrent = 0;
177 },
178 // 监听外部current的变化,实时修改内部依赖于此测uCurrent值,如果更新了current,而不是更新uCurrent,
179 // 就会错乱,因为指示器是依赖于uCurrent的
180 current(n) {
181 this.uCurrent = n;
182 }
183 },
184 data() {
185 return {
186 uCurrent: this.current // 当前活跃的swiper-item的index
187 };
188 },
189 computed: {
190 justifyContent() {
191 if (this.indicatorPos == 'topLeft' || this.indicatorPos == 'bottomLeft') return 'flex-start';
192 if (this.indicatorPos == 'topCenter' || this.indicatorPos == 'bottomCenter') return 'center';
193 if (this.indicatorPos == 'topRight' || this.indicatorPos == 'bottomRight') return 'flex-end';
194 },
195 titlePaddingBottom() {
196 let tmp = 0;
197 if (this.mode == 'none') return '12rpx';
198 if (['bottomLeft', 'bottomCenter', 'bottomRight'].indexOf(this.indicatorPos) >= 0 && this.mode == 'number') {
199 tmp = '60rpx';
200 } else if (['bottomLeft', 'bottomCenter', 'bottomRight'].indexOf(this.indicatorPos) >= 0 && this.mode != 'number') {
201 tmp = '40rpx';
202 } else {
203 tmp = '12rpx';
204 }
205 return tmp;
206 },
207 // 因为uni的swiper组件的current参数只接受Number类型,这里做一个转换
208 elCurrent() {
209 return Number(this.current);
210 }
211 },
212 methods: {
213 listClick(index) {
214 this.$emit('click', index);
215 },
216 change(e) {
217 let current = e.detail.current;
218 this.uCurrent = current;
219 // 发出change事件,表示当前自动切换的index,从0开始
220 this.$emit('change', current);
221 },
222 // 头条小程序不支持animationfinish事件,改由change事件
223 // 暂不监听此事件,因为不再给swiper绑定uCurrent属性
224 animationfinish(e) {
225 // #ifndef MP-TOUTIAO
226 // this.uCurrent = e.detail.current;
227 // #endif
228 }
229 }
230 };
231</script>
232
233<style lang="scss" scoped>
234 @import "../../libs/css/style.components.scss";
235
236 .u-swiper-wrap {
237 position: relative;
238 overflow: hidden;
239 transform: translateY(0);
240 }
241
242 .u-swiper-image {
243 width: 100%;
244 will-change: transform;
245 height: 100%;
246 /* #ifndef APP-NVUE */
247 display: block;
248 /* #endif */
249 /* #ifdef H5 */
250 pointer-events: none;
251 /* #endif */
252 }
253
254 .u-swiper-indicator {
255 padding: 0 24rpx;
256 position: absolute;
257 @include vue-flex;
258 width: 100%;
259 z-index: 1;
260 }
261
262 .u-indicator-item-rect {
263 width: 26rpx;
264 height: 8rpx;
265 margin: 0 6rpx;
266 transition: all 0.5s;
267 background-color: rgba(0, 0, 0, 0.3);
268 }
269
270 .u-indicator-item-rect-active {
271 background-color: rgba(255, 255, 255, 0.8);
272 }
273
274 .u-indicator-item-dot {
275 width: 14rpx;
276 height: 14rpx;
277 margin: 0 6rpx;
278 border-radius: 20rpx;
279 transition: all 0.5s;
280 background-color: rgba(0, 0, 0, 0.3);
281 }
282
283 .u-indicator-item-dot-active {
284 background-color: rgba(255, 255, 255, 0.8);
285 }
286
287 .u-indicator-item-round {
288 width: 14rpx;
289 height: 14rpx;
290 margin: 0 6rpx;
291 border-radius: 20rpx;
292 transition: all 0.5s;
293 background-color: rgba(0, 0, 0, 0.3);
294 }
295
296 .u-indicator-item-round-active {
297 width: 34rpx;
298 background-color: rgba(255, 255, 255, 0.8);
299 }
300
301 .u-indicator-item-number {
302 padding: 6rpx 16rpx;
303 line-height: 1;
304 background-color: rgba(0, 0, 0, 0.3);
305 border-radius: 100rpx;
306 font-size: 26rpx;
307 color: rgba(255, 255, 255, 0.8);
308 }
309
310 .u-list-scale {
311 transform-origin: center center;
312 }
313
314 .u-list-image-wrap {
315 width: 100%;
316 height: 100%;
317 flex: 1;
318 transition: all 0.5s;
319 overflow: hidden;
320 box-sizing: content-box;
321 position: relative;
322 }
323
324 .u-swiper-title {
325 position: absolute;
326 background-color: rgba(0, 0, 0, 0.3);
327 bottom: 0;
328 left: 0;
329 width: 100%;
330 font-size: 28rpx;
331 padding: 12rpx 24rpx;
332 color: rgba(255, 255, 255, 0.9);
333 }
334
335 .u-swiper-item {
336 @include vue-flex;
337 overflow: hidden;
338 align-items: center;
339 }
340</style>