微信小程序实现上传多张图片、删除图片
缘飞梦 人气:2本文着重为大家仔细讲解了微信小程序实现上传多张图片、删除图片,文中代码实例讲解的非常细致,希望能够帮助到您,欢迎大家阅读和收藏
最近在做微信小程序,遇到上传多张图片到服务器,计算上传图片的张数,并且可以手动删除图片,下面是效果图
效果图:
本来用的是小程序提供的 mp-uploader 上传图片的组件,无奈次组件删除效果不是我想要的,只能用 wx.chooseImage进行上传图片,在使用uplaodFile将图片发送给后台服务器。
下面直接展示代码:
wxml:
<view class="con_titles"> <view class="con_left"> <image src="../../images/comint.png"></image> <text class="titles_t">患者病历</text> </view> <view class="img_num">{{imgShow.length}}/6</view> </view> <view class="page__bd"> <!-- <mp-uploader style='color:#353535' bindfail="uploadError" bindsuccess="uploadSuccess" select="{{selectFile}}" upload="{{uplaodFile}}" files="{{files}}" max-count="6" title="患者病历"></mp-uploader> --> <view class="add-image"> <view class="images-boxc" wx:for="{{imgShow}}" wx:for-item="item" wx:key="image"> <image class="image_size" data-index="{{index}}" data-src="{{item}}" src="{{item}}" bindtap="clickImage"></image> <image class="delete-image" data-index="{{index}}" src="../../imageshttps://img.qb5200.com/download-x/delete_img.png" bindtap="deleteImage"></image> </view> <view class="images-add" wx:if="{{imgShow.length<6}}"> <image class="image_size image_sizen" src="../../images/add_img.png" bindtap="chooseImage"></image> </view> </view> </view>
wxss:
/* 上传图片 */ .images-boxc { position: relative; border: dashed 1px #bfbfbf; width: 139rpx; height: 139rpx; margin-right: 32rpx; margin-bottom: 32rpx; } .delete-image { position: absolute; width: 30rpx; height: 30rpx; right: 16rpx; top: 16rpx; } .add-image { display: flex; flex-wrap: wrap; } .image_size { width: 139rpx; height: 139rpx; } .image_sizen { height: 142rpx; }
js:
data: { count: 6, //设置最多6张图片 allImg: [], imgShow: [], }, // 上传图片 chooseImage: function() { wx.showLoading({ title: '加载中...', mask: true }) var that = this; var imgShow = that.data.imgShow; var count = that.data.count - imgShow.length; //设置最多6张图片 wx.chooseImage({ count: count, sizeType: ['compressed'], // 可以指定是原图还是压缩图,默认二者都有 sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机,默认二者都有 success: function(res) { console.log(res) that.uplaodFile(res) for (var i = 0, h = res.tempFilePaths.length; i < h; i++) { imgShow.push(res.tempFilePaths[i]); that.setData({ imgShow: imgShow }) } wx.hideLoading({ title: '加载中...', mask: false }) } }) }, // 删除图片 deleteImage(e) { let self = this; let index = e.target.dataset.index; let imgShow = self.data.imgShow; let allImg = self.data.allImg; allImg.splice(index, 1); imgShow.splice(index, 1); this.setData({ imgShow: imgShow, allImg: allImg }) }, previewImage: function(e) { console.log(this.data.files) wx.previewImage({ current: e.currentTarget.id, // 当前显示图片的http链接 urls: this.data.files // 需要预览的图片http链接列表 }) }, selectFile(files) { console.log('files', files) // 返回false可以阻止某次文件上传 }, uplaodFile(files) { console.log('upload files', files) let that = this files.tempFilePaths.forEach(element => { util.uploadFile('/fastdfsServer/fileUpload', element, 'file', {}, function(res) { //上传本地图片地址到服务器 返回地址 存放到input提交时取值 res = JSON.parse(res); if (res.responseCode == 0) { sysMsg.sysMsg("上传成功", 1000, 'success'); that.setData({ allImg: that.data.allImg.concat(res.responseBody) }); } else { sysMsg.sysMsg("上传失败", 1500, 'error'); } }); }); // 文件上传的函数,返回一个promise return new Promise((resolve, reject) => { resolve({ urls: files.tempFilePaths }); setTimeout(() => { reject('some error') }, 10000) }) }, uploadError(e) { console.log('upload error', e.detail) }, uploadSuccess(e) { // this.setData({ // allImg: this.data.allImg.concat(e.detail.urls[0]) // }); console.log('upload success', e.detail, e.detail.urls) },
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