写一个下载到localStorage的辅助函数
const fileSystem = wx.getFileSystemManager() const getStorageImage = (web_image) => { let webImages = wx.getStorageSync('webImages') || [] let webImage = webImages.find(y => y.web_path === web_image) if (webImage) { try { fileSystem.accessSync(webImage.local_path) return webImage.local_path } catch(e) { let webImageIdx = webImages.findIndex(y => y.web_path === web_image) webImages.splice(webImageIdx, 1) wx.setStorageSync('webImages', webImages) } } else { wx.downloadFile({ url: web_image, success (res) { if (res.statusCode === 200) { let filePath = res.tempFilePath let webImageStorage = wx.getStorageSync('webImages') || [] let storage = { web_path: web_image, local_path: filePath, last_time: Date.parse(new Date()), } webImageStorage.push(storage) wx.setStorageSync('webImages', webImageStorage) } } }) } return web_image } module.exports = { getStorageImage }在显示图片地址的地方调用一下即可
<image src="{{image_filepath}}"></image> <script> this.setData("image_filepath",getStorageImage("http://test.com/test.png")); </scrript>
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