uni-app实现type=file并且实现图片上传

uni-app实现type=file并且实现图片上传

<view class="btn-choice-pic" ref="input">
	<view class="" @click="choicePic">
		选择图片
	</view>
</view>

	mounted() {
				// 创建附件上传
				var _self = this;
				var input = document.createElement('input'); //创建元素
				input.type = 'file' //添加file类型
				input.ref = 'myChangePic' //添加file类型
				input.className = 'addinput'
				input.style.position = 'absolute'
				input.style.top = '0'
				input.style.width = '80%'
				input.style.left = '10%'
				input.style.height = '50px'
				input.style.lineHeight = '50px'
				input.style.opacity = '0'
				input.onclick = (event) => {
					console.log('ars')
					_self.choicePic(input, event)
				}
				this.$refs.input.$el.appendChild(input)
			}，

methods:{
	choicePic(input, event) {
				this.jiequShow = 1
				// this.$refs.myChangePic.click()
				var that = this;
				let count = 1; //默认上传的图片数量
				uni.chooseImage({
					count: 1, //默认9
					sizeType: ['original', 'compressed'], //可以指定是原图还是压缩图，默认二者都有
					sourceType: ['album'], //从相册选择
					success: (res) => {
						if (that.imgList.length < count) {
							for (var i = 0; i < res.tempFilePaths.length; i++) {
								that.urlToBase(res.tempFilePaths[i]).then(res => {
									that.imgList = that.imgList.concat(res)
								})
							}
						} else {
							that.imgList = [] //设置为空数组
							for (var i = 0; i < res.tempFilePaths.length; i++) {
								that.urlToBase(res.tempFilePaths[i]).then(res => {
									that.imgList = that.imgList.concat(res)
								})
							}
						}
					}
				});

			},
			urlToBase(url) {
			return new Promise((resolve, reject) => {
				uni.request({
					url: url,
					method: 'GET',
					responseType: 'arraybuffer',
					success: res => {
						let base = wx.arrayBufferToBase(res.data); //把arraybuffer转成base
						base = 'data:image/jpeg;base,' + base //不加上这串字符，在页面无法显示的
						this.imgs = base
						console.log(base)
						resolve(base)
					},
					fail: err => {
						reject(err)
					}
				})
			})
		},
}