微信小程序保存图片到相册

申请权限

代码如下

wx.downloadFile({url: image, //仅为示例，并非真实的资源success(res) {// 只要服务器有响应数据，就会把响应内容写入文件并进入 success 回调，业务需要自行判断是否下载到了想要的内容if (res.statusCode === 200) {console.log(res);wx.saveImageToPhotosAlbum({filePath: res.tempFilePath,success: function(res) {wx.showToast({icon: 'none',title: "保存成功"})},fail: function(err) {if (err.errMsg === "saveImageToPhotosAlbum:fail:auth denied" || err.errMsg === "saveImageToPhotosAlbum:fail auth deny" || err.errMsg === "saveImageToPhotosAlbum:fail authorize no response") {wx.showModal({title: '提示',content: '需要您授权保存相册',showCancel: false,success: modalSuccess => {wx.openSetting({success(settingdata) {if (settingdata.authSetting['scope.writePhotosAlbum']) {console.log('获取权限成功，给出再次点击图片保存到相册的提示。')} else {console.log('获取权限失败，给出不给权限就无法正常使用的提示')wx.showToast({icon: 'none',title: "暂未授权，保存失败"})}}})}})} else {wx.showToast({icon: 'none',title: "保存失败"})}}});}}
})//保存base64图片
/*** 保存base64的图片* @param {String} imgData base64编码的数据*/
function saveBase64Img(imgData) {let save = wx.getFileSystemManager();let number = Math.random();save.writeFile({filePath: wx.env.USER_DATA_PATH + '/pic' + number + '.png',data: imgData,encoding: 'base64',success: (res) => {wx.saveImageToPhotosAlbum({filePath: wx.env.USER_DATA_PATH + '/pic' + number + '.png',success: function (res) {showNoIconToast("保存成功");},fail: function (err) {showNoIconToast("保存失败");}});},fail: (err) => {if (err.errMsg === "saveImageToPhotosAlbum:fail:auth denied" || err.errMsg === "saveImageToPhotosAlbum:fail auth deny" || err.errMsg === "saveImageToPhotosAlbum:fail authorize no response") {wx.showModal({title: '提示',content: '需要您授权保存相册',showCancel: false,success: modalSuccess => {wx.openSetting({success(settingdata) {if (settingdata.authSetting['scope.writePhotosAlbum']) {console.log('获取权限成功，给出再次点击图片保存到相册的提示。')} else {console.log('获取权限失败，给出不给权限就无法正常使用的提示')wx.showToast({icon: 'none',title: "暂未授权，保存失败"})}}})}})else{wx.showToast({icon: 'none',title: "保存失败"})}}})
}