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yanzong_qianduan/uni_modules/vk-uview-ui/components/u-upload/u-upload.vue

729 lines
21 KiB

11 months ago
<template>
<view class="u-upload" v-if="!disabled">
<view
v-if="showUploadList"
class="u-list-item u-preview-wrap"
v-for="(item, index) in lists"
:key="index"
:style="{
width: $u.addUnit(width),
height: $u.addUnit(height)
}"
>
<view
v-if="deletable"
class="u-delete-icon"
@tap.stop="deleteItem(index)"
:style="{
background: delBgColor
}"
>
<u-icon class="u-icon" :name="delIcon" size="20" :color="delColor"></u-icon>
</view>
<!-- <view
v-if="item.progress >= 100"
class="u-success-icon"
>
<u-icon class="u-icon" :name="successIcon" size="20" :color="successColor"></u-icon>
</view> -->
<u-line-progress
v-if="showProgress && item.progress > 0 && item.progress != 100 && !item.error"
:show-percent="false"
height="16"
class="u-progress"
:percent="item.progress"
></u-line-progress>
<view @tap.stop="retry(index)" v-if="item.error" class="u-error-btn">点击重试</view>
<image @tap.stop="doPreviewImage(item.url || item.path, index)" class="u-preview-image" v-if="!item.isImage" :src="item.url || item.path" :mode="imageMode"></image>
</view>
<slot name="file" :file="lists"></slot>
<view style="display: inline-block;" @tap="selectFile" v-if="maxCount > lists.length">
<slot name="addBtn"></slot>
<view
v-if="!customBtn"
class="u-list-item u-add-wrap"
hover-class="u-add-wrap__hover"
hover-stay-time="150"
:style="{
width: $u.addUnit(width),
height: $u.addUnit(height)
}"
>
<u-icon name="plus" class="u-add-btn" size="40"></u-icon>
<view class="u-add-tips">{{ uploadText }}</view>
</view>
</view>
</view>
</template>
<script>
/**
* upload 图片上传
* @description 该组件用于上传图片场景
* @tutorial https://www.uviewui.com/components/upload.html
* @property {String} action 服务器上传地址
* @property {String Number} max-count 最大选择图片的数量默认99
* @property {Boolean} custom-btn 如果需要自定义选择图片的按钮设置为true默认false
* @property {Boolean} show-progress 是否显示进度条默认true
* @property {Boolean} disabled 是否启用(显示/移仓)组件默认false
* @property {String} image-mode 预览图片等显示模式可选值为uni的image的mode属性值默认aspectFill
* @property {String} del-icon 右上角删除图标名称只能为uView内置图标
* @property {String} del-bg-color 右上角关闭按钮的背景颜色
* @property {String | Number} index 在各个回调事件中的最后一个参数返回用于区别是哪一个组件的事件
* @property {String} del-color 右上角关闭按钮图标的颜色
* @property {Object} header 上传携带的头信息对象形式
* @property {Object} form-data 上传额外携带的参数
* @property {String} name 上传文件的字段名供后端获取使用默认file
* @property {Array<String>} size-type original 原图compressed 压缩图默认二者都有默认['original', 'compressed']
* @property {Array<String>} source-type 选择图片的来源album-从相册选图camera-使用相机默认二者都有默认['album', 'camera']
* @property {Boolean} preview-full-image 是否可以通过uni.previewImage预览已选择的图片默认true
* @property {Boolean} multiple 是否开启图片多选部分安卓机型不支持默认true
* @property {Boolean} deletable 是否显示删除图片的按钮默认true
* @property {String Number} max-size 选择单个文件的最大大小单位B(byte)默认不限制默认Number.MAX_VALUE
* @property {Array<Object>} file-list 默认显示的图片列表数组元素为对象必须提供url属性
* @property {Boolean} upload-text 选择图片按钮的提示文字默认选择图片
* @property {Boolean} auto-upload 选择完图片是否自动上传见上方说明默认true
* @property {Boolean} show-tips 特殊情况下是否自动提示toast见上方说明默认true
* @property {Boolean} show-upload-list 是否显示组件内部的图片预览默认true
* @event {Function} on-oversize 图片大小超出最大允许大小
* @event {Function} on-preview 全屏预览图片时触发
* @event {Function} on-remove 移除图片时触发
* @event {Function} on-success 图片上传成功时触发
* @event {Function} on-change 图片上传后无论成功或者失败都会触发
* @event {Function} on-error 图片上传失败时触发
* @event {Function} on-progress 图片上传过程中的进度变化过程触发
* @event {Function} on-uploaded 所有图片上传完毕触发
* @event {Function} on-choose-complete 每次选择图片后触发只是让外部可以得知每次选择后内部的文件列表
* @event {Function} on-list-change 当内部文件列表被加入文件移除文件或手动调用clear方法时触发
* @event {Function} on-choose-fail 选择文件出错时触发比如选择文件时取消了操作只在微信和APP有效
* @example <u-upload :action="action" :file-list="fileList" ></u-upload>
*/
export default {
name: "u-upload",
emits: ["update:file-list", "on-oversize", "on-list-change", "on-preview", "on-remove", "on-success", "on-change", "on-error", "on-progress", "on-uploaded", "on-choose-complete", "on-choose-fail"],
props: {
//是否显示组件自带的图片预览功能
showUploadList: {
type: Boolean,
default: true
},
// 后端地址
action: {
type: String,
default: ""
},
// 最大上传数量
maxCount: {
type: [String, Number],
default: 52
},
// 是否显示进度条
showProgress: {
type: Boolean,
default: true
},
// 是否启用
disabled: {
type: Boolean,
default: false
},
// 预览上传的图片时的裁剪模式,和image组件mode属性一致
imageMode: {
type: String,
default: "aspectFill"
},
// 头部信息
header: {
type: Object,
default() {
return {};
}
},
// 额外携带的参数
formData: {
type: Object,
default() {
return {};
}
},
// 上传的文件字段名
name: {
type: String,
default: "file"
},
// 所选的图片的尺寸, 可选值为original compressed
sizeType: {
type: Array,
default() {
return ["original", "compressed"];
}
},
sourceType: {
type: Array,
default() {
return ["album", "camera"];
}
},
// 是否在点击预览图后展示全屏图片预览
previewFullImage: {
type: Boolean,
default: true
},
// 是否开启图片多选,部分安卓机型不支持
multiple: {
type: Boolean,
default: true
},
// 是否展示删除按钮
deletable: {
type: Boolean,
default: true
},
// 文件大小限制,单位为byte
maxSize: {
type: [String, Number],
default: Number.MAX_VALUE
},
// 显示已上传的文件列表
fileList: {
type: Array,
default() {
return [];
}
},
// 上传区域的提示文字
uploadText: {
type: String,
default: "选择图片"
},
// 是否自动上传
autoUpload: {
type: Boolean,
default: true
},
// 是否显示toast消息提示
showTips: {
type: Boolean,
default: true
},
// 是否通过slot自定义传入选择图标的按钮
customBtn: {
type: Boolean,
default: false
},
// 内部预览图片区域和选择图片按钮的区域宽度
width: {
type: [String, Number],
default: 200
},
// 内部预览图片区域和选择图片按钮的区域高度
height: {
type: [String, Number],
default: 200
},
// 右上角关闭按钮的背景颜色
delBgColor: {
type: String,
default: "#fa3534"
},
// 右上角关闭按钮的叉号图标的颜色
delColor: {
type: String,
default: "#ffffff"
},
// 右上角删除图标名称,只能为uView内置图标
delIcon: {
type: String,
default: "close"
},
// 右下角成功图标名称,只能为uView内置图标
successIcon: {
type: String,
default: "checkbox-mark"
},
// 右下角成功的叉号图标的颜色
successColor: {
type: String,
default: "#ffffff"
},
// 如果上传后的返回值为json字符串,是否自动转json
toJson: {
type: Boolean,
default: true
},
// 上传前的钩子,每个文件上传前都会执行
beforeUpload: {
type: Function,
default: null
},
// 移除文件前的钩子
beforeRemove: {
type: Function,
default: null
},
// 允许上传的图片后缀
limitType: {
type: Array,
default() {
// 支付宝小程序真机选择图片的后缀为"image"
// https://opendocs.alipay.com/mini/api/media-image
return ["png", "jpg", "jpeg", "webp", "gif", "image"];
}
},
// 在各个回调事件中的最后一个参数返回,用于区别是哪一个组件的事件
index: {
type: [Number, String],
default: ""
}
},
mounted() {},
data() {
return {
lists: [],
isInCount: true,
uploading: false
};
},
watch: {
fileList: {
immediate: true,
handler(val) {
let that = this;
let lists = JSON.parse(JSON.stringify(that.lists));
val.map(value => {
// 首先检查内部是否已经添加过这张图片,因为外部绑定了一个对象给fileList的话(对象引用),进行修改外部fileList
// 时,会触发watch,导致重新把原来的图片再次添加到this.lists
// 数组的some方法意思是,只要数组元素有任意一个元素条件符合,就返回true,而另一个数组的every方法的意思是数组所有元素都符合条件才返回true
let tmp = lists.some(val => {
return val.url == value.url;
});
// 如果内部没有这个图片(tmp为false),则添加到内部
if (!tmp) {
lists.push({ url: value.url, error: false, progress: 100 });
}
});
that.lists = JSON.parse(JSON.stringify(lists));
}
},
// 监听lists的变化,发出事件
lists: {
deep: true,
handler(n) {
this.$emit("update:file-list", n);
this.$emit("on-list-change", n, this.index);
}
}
},
methods: {
// 清除列表
clear() {
this.lists = [];
},
// 重新上传队列中上传失败的所有文件
reUpload() {
this.uploadFile();
},
// 选择图片
selectFile() {
let that = this;
if (that.disabled) return;
const { name = "", maxCount, multiple, maxSize, sizeType, camera, compressed, maxDuration, sourceType } = that;
let chooseFile = null;
let lists = JSON.parse(JSON.stringify(that.lists));
const newMaxCount = maxCount - lists.length;
// 设置为只选择图片的时候使用 chooseImage 来实现
chooseFile = new Promise((resolve, reject) => {
uni.chooseImage({
count: multiple ? (newMaxCount > 9 ? 9 : newMaxCount) : 1,
sourceType: sourceType,
sizeType,
success: resolve,
fail: reject
});
});
chooseFile
.then(res => {
let file = null;
let listOldLength = that.lists.length;
res.tempFiles.map((val, index) => {
// 检查文件后缀是否允许,如果不在that.limitType内,就会返回false
if (!that.checkFileExt(val)) return;
// 如果是非多选,index大于等于1或者超出最大限制数量时,不处理
if (!multiple && index >= 1) return;
if (val.size > maxSize) {
that.$emit("on-oversize", val, that.lists, that.index);
that.showToast("超出允许的文件大小");
} else {
if (maxCount <= lists.length) {
that.$emit("on-exceed", val, that.lists, that.index);
that.showToast("超出最大允许的文件个数");
return;
}
lists.push({
url: val.path,
progress: 0,
error: false,
file: val
});
}
});
// 这样实现深拷贝会导致在H5中file为空对象
// that.lists = JSON.parse(JSON.stringify(lists));
this.deepClone(lists, that.lists);
// 每次图片选择完,抛出一个事件,并将当前内部选择的图片数组抛出去
that.$emit("on-choose-complete", that.lists, that.index);
if (that.autoUpload) that.uploadFile(listOldLength);
})
.catch(error => {
that.$emit("on-choose-fail", error);
});
},
// 提示用户消息
showToast(message, force = false) {
if (this.showTips || force) {
uni.showToast({
title: message,
icon: "none"
});
}
},
// 该方法供用户通过ref调用,手动上传
upload() {
this.uploadFile();
},
// 对失败的图片重新上传
retry(index) {
this.lists[index].progress = 0;
this.lists[index].error = false;
this.lists[index].response = null;
uni.showLoading({
title: "重新上传"
});
this.uploadFile(index);
},
// 上传图片
async uploadFile(index = 0) {
if (this.disabled) return;
if (this.uploading) return;
// 全部上传完成
if (index >= this.lists.length) {
this.$emit("on-uploaded", this.lists, this.index);
return;
}
// 检查是否是已上传或者正在上传中
if (this.lists[index].progress == 100) {
if (this.autoUpload == false) this.uploadFile(index + 1);
return;
}
// 执行before-upload钩子
if (this.beforeUpload && typeof this.beforeUpload === "function") {
// 执行回调,同时传入索引和文件列表当作参数
// 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
// 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
// 因为upload组件可能会被嵌套在其他组件内,比如u-form,这时this.$parent其实为u-form的this,
// 非页面的this,所以这里需要往上历遍,一直寻找到最顶端的$parent,这里用了this.$u.$parent.call(this)
// 明白意思即可,无需纠结this.$u.$parent.call(this)的细节
let beforeResponse = this.beforeUpload.bind(this.$u.$parent.call(this))(index, this.lists);
// 判断是否返回了promise
if (!!beforeResponse && typeof beforeResponse.then === "function") {
await beforeResponse
.then(res => {
// promise返回成功,不进行动作,继续上传
})
.catch(err => {
// 进入catch回调的话,继续下一张
return this.uploadFile(index + 1);
});
} else if (beforeResponse === false) {
// 如果返回false,继续下一张图片的上传
return this.uploadFile(index + 1);
} else {
// 此处为返回"true"的情形,这里不写代码,就跳过此处,继续执行当前的上传逻辑
}
}
// 检查上传地址
if (!this.action) {
this.showToast("请配置上传地址", true);
return;
}
this.lists[index].error = false;
this.uploading = true;
// 创建上传对象
const task = uni.uploadFile({
url: this.action,
filePath: this.lists[index].url,
name: this.name,
formData: this.formData,
header: this.header,
// #ifdef MP-ALIPAY
fileType:'image',
// #endif
success: res => {
// 判断是否json字符串,将其转为json格式
let data = this.toJson && this.$u.test.jsonString(res.data) ? JSON.parse(res.data) : res.data;
if (![200, 201, 204].includes(res.statusCode)) {
this.uploadError(index, data);
} else {
// 上传成功
this.lists[index].response = data;
this.lists[index].progress = 100;
this.lists[index].error = false;
this.$emit("on-success", data, index, this.lists, this.index);
}
},
fail: e => {
this.uploadError(index, e);
},
complete: res => {
uni.hideLoading();
this.uploading = false;
this.uploadFile(index + 1);
this.$emit("on-change", res, index, this.lists, this.index);
}
});
task.onProgressUpdate(res => {
if (res.progress > 0) {
this.lists[index].progress = res.progress;
this.$emit("on-progress", res, index, this.lists, this.index);
}
});
},
// 上传失败
uploadError(index, err) {
this.lists[index].progress = 0;
this.lists[index].error = true;
this.lists[index].response = null;
this.$emit("on-error", err, index, this.lists, this.index);
this.showToast("上传失败,请重试");
},
// 删除一个图片
deleteItem(index) {
uni.showModal({
title: "提示",
content: "您确定要删除此项吗?",
success: async res => {
if (res.confirm) {
// 先检查是否有定义before-remove移除前钩子
// 执行before-remove钩子
if (this.beforeRemove && typeof this.beforeRemove === "function") {
// 此处钩子执行 原理同before-remove参数,见上方注释
let beforeResponse = this.beforeRemove.bind(this.$u.$parent.call(this))(index, this.lists);
// 判断是否返回了promise
if (!!beforeResponse && typeof beforeResponse.then === "function") {
await beforeResponse
.then(res => {
// promise返回成功,不进行动作,继续上传
this.handlerDeleteItem(index);
})
.catch(err => {
// 如果进入promise的reject,终止删除操作
this.showToast("已终止移除");
});
} else if (beforeResponse === false) {
// 返回false,终止删除
this.showToast("已终止移除");
} else {
// 如果返回true,执行删除操作
this.handlerDeleteItem(index);
}
} else {
// 如果不存在before-remove钩子,
this.handlerDeleteItem(index);
}
}
}
});
},
// 执行移除图片的动作,上方代码只是判断是否可以移除
handlerDeleteItem(index) {
// 如果文件正在上传中,终止上传任务,进度在0 < progress < 100则意味着正在上传
if (this.lists[index].progress < 100 && this.lists[index].progress > 0) {
typeof this.lists[index].uploadTask != 'undefined' && this.lists[index].uploadTask.abort();
}
this.lists.splice(index, 1);
this.$forceUpdate();
this.$emit("on-remove", index, this.lists, this.index);
//this.showToast('移除成功');
},
// 用户通过ref手动的形式,移除一张图片
remove(index) {
// 判断索引的合法范围
if (index >= 0 && index < this.lists.length) {
this.lists.splice(index, 1);
this.$emit('on-list-change', this.lists, this.index);
}
},
// 预览图片
doPreviewImage(url, index) {
if (!this.previewFullImage) {
this.$emit("on-preview", url, this.lists, this.index);
return;
}
const images = this.lists.map(item => item.url || item.path);
uni.previewImage({
urls: images,
current: url,
success: () => {
this.$emit("on-preview", url, this.lists, this.index);
},
fail: () => {
uni.showToast({
title: "预览图片失败",
icon: "none"
});
}
});
},
// 判断文件后缀是否允许
checkFileExt(file) {
// 检查是否在允许的后缀中
let noArrowExt = false;
// 获取后缀名
let fileExt = "";
const reg = /.+\./;
// 如果是H5,需要从name中判断
// #ifdef H5
fileExt = file.name.replace(reg, "").toLowerCase();
// #endif
// 非H5,需要从path中读取后缀
// #ifndef H5
fileExt = file.path.replace(reg, "").toLowerCase();
// #endif
// 使用数组的some方法,只要符合limitType中的一个,就返回true
noArrowExt = this.limitType.some(ext => {
// 转为小写
return ext.toLowerCase() === fileExt;
});
if (!noArrowExt) this.showToast(`不允许选择${fileExt}格式的文件`);
return noArrowExt;
},
// 深拷贝
deepClone(obj, newObj) {
for (let k in obj) {
const value = obj[k];
if (Array.isArray(value)) {
newObj[k] = [];
this.deepClone(value, newObj[k]);
} else if (value !== null && typeof value === "object") {
newObj[k] = {};
this.deepClone(value, newObj[k]);
} else {
newObj[k] = value;
}
}
}
}
};
</script>
<style lang="scss" scoped>
@import "../../libs/css/style.components.scss";
.u-upload {
@include vue-flex;
flex-wrap: wrap;
align-items: center;
}
.u-list-item {
width: 200rpx;
height: 200rpx;
overflow: hidden;
margin: 10rpx;
background: rgb(244, 245, 246);
position: relative;
border-radius: 10rpx;
/* #ifndef APP-NVUE */
display: flex;
/* #endif */
align-items: center;
justify-content: center;
}
.u-preview-wrap {
border: 1px solid rgb(235, 236, 238);
}
.u-add-wrap {
flex-direction: column;
color: $u-content-color;
font-size: 26rpx;
}
.u-add-tips {
margin-top: 20rpx;
line-height: 40rpx;
}
.u-add-wrap__hover {
background-color: rgb(235, 236, 238);
}
.u-preview-image {
display: block;
width: 100%;
height: 100%;
border-radius: 10rpx;
}
.u-delete-icon {
position: absolute;
top: 6rpx;
right: 6rpx;
z-index: 10;
background-color: $u-type-error;
border-radius: 100rpx;
width: 36rpx;
height: 36rpx;
@include vue-flex;
align-items: center;
justify-content: center;
}
.u-icon {
@include vue-flex;
align-items: center;
justify-content: center;
}
.u-success-icon {
position: absolute;
bottom: 6rpx;
right: 6rpx;
z-index: 10;
background-color: #5ac725;
border-radius: 100rpx;
width: 36rpx;
height: 36rpx;
@include vue-flex;
align-items: center;
justify-content: center;
}
.u-progress {
position: absolute;
bottom: 10rpx;
left: 8rpx;
right: 8rpx;
z-index: 9;
width: auto;
}
.u-error-btn {
color: #ffffff;
background-color: $u-type-error;
font-size: 20rpx;
padding: 4px 0;
text-align: center;
position: absolute;
bottom: 0;
left: 0;
right: 0;
z-index: 9;
line-height: 1;
}
</style>