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var url = '網絡圖片路徑';

wx.downloadFile({

?url: url,

??success: function (res) {

??var benUrl = res.tempFilePath;

??//圖片保存到本地相冊

??wx.saveImageToPhotosAlbum({

???filePath: benUrl,

???//授權成功，保存圖片

???success: function (data) {

???wx.showToast({

????title: '保存成功',

????icon: 'success',

????duration: 2000

???})

???},

???//授權失敗

???fail: function (err) {

???if (err.errMsg) {//重新授權彈框確認

????wx.showModal({

?????title: '提示',

?????content: '您好,請先授權，在保存此圖片。',

?????showCancel: false,

?????success(res) {

?????if (res.confirm) {//重新授權彈框用戶點擊了確定

??????wx.openSetting({//進入小程序授權設置頁面

??????success(settingdata) {

???????console.log(settingdata)

???????if (settingdata.authSetting['scope.writePhotosAlbum']) {//用戶打開了保存圖片授權開關

???????wx.saveImageToPhotosAlbum({

????????filePath: benUrl,

????????success: function (data) {

????????wx.showToast({

?????????title: '保存成功',

?????????icon: 'success',

?????????duration: 2000

????????})

????????},

???????})

???????} else {//用戶未打開保存圖片到相冊的授權開關

???????wx.showModal({

????????title: '溫馨提示',

????????content: '授權失敗，請稍后重新獲取',

????????showCancel: false,

???????})

???????}

??????}

??????})

?????}

?????}

????})

???}

???}

??})

??}

?})

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wx.chooseImage({

count: 1,// 默認9

??sizeType: ['original', 'compressed'],// 可以指定是原圖還是壓縮圖，默認二者都有

??sourceType: ['album', 'camera'],// 可以指定來源是相冊還是相機，默認二者都有

??success: function (res) {

??// 返回選定照片的本地文件路徑列表，tempFilePath可以作為img標簽的src屬性顯示圖片

??console.log("choose image")

??console.log(res)

??var tempFilePath = res.tempFilePaths[0]

??wx.getImageInfo({

???src: tempFilePath,

???success: function (res) {

???console.log("get image info")

???console.log(res)

???wx.saveImageToPhotosAlbum({

????filePath: res.path,

????success(res) {

????console.log("保存圖片成功")

????console.log(res)

????wx.showToast({

?????title: '保存成功',

?????icon: 'success',

?????duration: 2000

????})

????},

????fail(err) {

????console.log('失敗')

????console.log(err)

??

????if (err.errMsg == "saveImageToPhotosAlbum:fail cancel") {

?????wx.openSetting({

?????success(settingdata) {

??????console.log(settingdata)

??????if (settingdata.authSetting["scope.writePhotosAlbum"]) {

??????console.log('獲取權限成功，給出再次點擊圖片保存到相冊的提示。')

??????} else {

??????console.log('獲取權限失敗，給出不給權限就無法正常使用的提示')

??????}

?????}

?????})

????}

????}

???})

???}

??})

??}

})