需求
在写项目的过程中,肯定会遇到图片上传的问题,即上传本地图片到服务器上,本文就用uni-app来述说在项目中怎样使用代码来实现这个功能
准备
- uni-app项目代码
- 代码编辑器(本文采用的是HBuilder X)
- uni-app提供的官方库
开始
-
在自己的项目中引入官方的样式库和图片上传兼容处理的js:
-
在官方项目中找到图片上传需要的组件:
-
在自己的项目中创建一个组件,来放官方图片上传组件的代码(本文以upload-image为组件名),复制官方image.vue组件代码放在自己项目的upload-image.vue组件中
-
在另一个组件中引入、注册、使用加效果
注意点:
官方组件即image.vue中需要注意两点
之后就可以自己在组件中修改了!!!
附上我的项目的最终效果
附代码
- unload-image.vue
<template>
<view class="px-2">
<view class="uni-uploader">
<view class="uni-uploader-head">
<view class="uni-uploader-title">点击可预览选好的图片</view>
<view class="uni-uploader-info">{{imageList.length}}/9</view>
</view>
<view class="uni-uploader-body">
<view class="uni-uploader__files">
<block v-for="(image,index) in imageList" :key="index">
<view class="uni-uploader__file">
<image class="uni-uploader__img rounded" :src="image" :data-src="image" @tap="previewImage" mode="aspectFill"></image>
</view>
</block>
<view class="uni-uploader__input-box rounded">
<view class="uni-uploader__input" @tap="chooseImage"></view>
</view>
</view>
</view>
</view>
</view>
</template>
<script>
import permision from "@/common/permission.js"
var sourceType = [
['camera'],
['album'],
['camera', 'album']
]
var sizeType = [
['compressed'],
['original'],
['compressed', 'original']
]
export default {
data() {
return {
title: 'choose/previewImage',
imageList: [],
sourceTypeIndex: 2,
sourceType: ['拍照', '相册', '拍照或相册'],
sizeTypeIndex: 2,
sizeType: ['压缩', '原图', '压缩或原图'],
countIndex: 8,
count: [1, 2, 3, 4, 5, 6, 7, 8, 9]
}
},
onUnload() {
this.imageList = [],
this.sourceTypeIndex = 2,
this.sourceType = ['拍照', '相册', '拍照或相册'],
this.sizeTypeIndex = 2,
this.sizeType = ['压缩', '原图', '压缩或原图'],
this.countIndex = 8;
},
methods: {
chooseImage: async function() {
// #ifdef APP-PLUS
// TODO 选择相机或相册时 需要弹出actionsheet,目前无法获得是相机还是相册,在失败回调中处理
if (this.sourceTypeIndex !== 2) {
let status = await this.checkPermission();
if (status !== 1) {
return;
}
}
// #endif
if (this.imageList.length === 9) {
let isContinue = await this.isFullImg();
console.log("是否继续?", isContinue);
if (!isContinue) {
return;
}
}
uni.chooseImage({
sourceType: sourceType[this.sourceTypeIndex],
sizeType: sizeType[this.sizeTypeIndex],
count: this.imageList.length + this.count[this.countIndex] > 9 ? 9 - this.imageList.length : this.count[this.countIndex],
success: (res) => {
this.imageList = this.imageList.concat(res.tempFilePaths);
this.$emit('choose',this.imageList)
},
fail: (err) => {
// #ifdef APP-PLUS
if (err['code'] && err.code !== 0 && this.sourceTypeIndex === 2) {
this.checkPermission(err.code);
}
// #endif
// #ifdef MP
uni.getSetting({
success: (res) => {
let authStatus = false;
switch (this.sourceTypeIndex) {
case 0:
authStatus = res.authSetting['scope.camera'];
break;
case 1:
authStatus = res.authSetting['scope.album'];
break;
case 2:
authStatus = res.authSetting['scope.album'] && res.authSetting['scope.camera'];
break;
default:
break;
}
if (!authStatus) {
uni.showModal({
title: '授权失败',
content: 'Hello uni-app需要从您的相机或相册获取图片,请在设置界面打开相关权限',
success: (res) => {
if (res.confirm) {
uni.openSetting()
}
}
})
}
}
})
// #endif
}
})
},
isFullImg: function() {
return new Promise((res) => {
uni.showModal({
content: "已经有9张图片了,是否清空现有图片?",
success: (e) => {
if (e.confirm) {
this.imageList = [];
res(true);
} else {
res(false)
}
},
fail: () => {
res(false)
}
})
})
},
previewImage: function(e) {
var current = e.target.dataset.src
uni.previewImage({
current: current,
urls: this.imageList
})
},
async checkPermission(code) {
let type = code ? code - 1 : this.sourceTypeIndex;
let status = permision.isIOS ? await permision.requestIOS(sourceType[type][0]) :
await permision.requestAndroid(type === 0 ? 'android.permission.CAMERA' :
'android.permission.READ_EXTERNAL_STORAGE');
if (status === null || status === 1) {
status = 1;
} else {
uni.showModal({
content: "没有开启权限",
confirmText: "设置",
success: function(res) {
if (res.confirm) {
permision.gotoAppSetting();
}
}
})
}
return status;
}
}
}
</script>
<style>
.cell-pd {
padding: 22upx 30upx;
}
.list-pd {
margin-top: 50upx;
}
</style>
- 引入
// 引入图片组件
import unloadImage from '@/components/common/unload-image.vue'
- 注册
components: {
uniNavBar,unloadImage
},
- 使用
<!-- 多图上传 -->
<unloadImage @choose="choose"></unloadImage>