长按下载图片
wx.getSetting({
success(res) {
if (!res.authSetting[\'scope.writePhotosAlbum\']) {
wx.authorize({
scope:\'scope.writePhotosAlbum\',
success() {
console.log(\'授权成功\')
}
})
}
}
}),
获取授权
wx.downloadFile({
url: \'https:/pages/shareimg.png\',
success:function (res) {
console.log(res);
//图片保存到本地
wx.saveImageToPhotosAlbum({
filePath: res.tempFilePath,
success:function (data) {
wx.showToast({
title: \'保存成功\'
});
},
fail:function (err) {
console.log(err);
if (err.errMsg === "saveImageToPhotosAlbum:fail auth deny") {
console.log("用户一开始拒绝了，我们想再次发起授权")
console.log(\'打开设置窗口\')
wx.openSetting({
success(settingdata) {
console.log(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\')
}
}
})
}
}
})
}
})
下载图片保存至相册
要在授权和下载的外面添加一个延时处理
setTimeout(() => {},300}
小程序分享API
onShareAppMessage: function (res) {
if (res.from === \'button\') {
// 来自页面内转发按钮
console.log(res.target)
}
// console.log(this.data.changNUm);
// console.log(this.data.imgNum);
return {
title: \'标题\',
path: \'/page/shareimg/index?indexNum=\' + this.data.imgNum + "&randumNum=" + this.data.changNUm, //可在链接上添加参数
}
}