小程序保存图片到本地授权问题

保存图片到本地:
wx.saveImageToPhotosAlbum(Object object)
调用前需要授权处理

// 保存图片
savePoster () {
this.isPoster = true
setTimeout(() => {
// canvas保存为png
wx.canvasToTempFilePath(
{
canvasId: ‘myCanvas’,
success: res => {
console.log(res)
wx.saveImageToPhotosAlbum({
filePath: res.tempFilePath,
success: data => {
console.log(data, ‘ddd’)
wx.hideLoading()
wx.showToast({
title: ‘保存成功~’
})
},
fail (err) {
console.log(err, ‘e’)
if (err.errMsg === ‘saveImageToPhotosAlbum:fail:auth denied’ || err.errMsg === ‘saveImageToPhotosAlbum:fail auth deny’) {
// 这边微信做过调整，必须要在按钮中触发，因此需要在弹框回调中进行调用
wx.showModal({
title: ‘提示’,
content: ‘需要您授权保存相册’,
showCancel: false,
success: modalSuccess => {
wx.openSetting({
success (settingdata) {
console.log(‘settingdata’, settingdata)
if (settingdata.authSetting[‘scope.writePhotosAlbum’]) {
wx.showModal({
title: ‘提示’,
content: ‘获取权限成功,再次点击图片即可保存’,
showCancel: false
})
} else {
wx.showModal({
title: ‘提示’,
content: ‘获取权限失败，将无法保存到相册哦~’,
showCancel: false
})
}
},
fail (failData) {
console.log(‘failData’, failData)
},
complete (finishData) {
console.log(‘finishData’, finishData)
}
})
}
})
}
}
})
},
fail: err => {
console.error(err)
}
},
this
)
}, 1000)
this.show = false
wx.hideLoading()
},

详细: https://www.jianshu.com/p/77b8d520ba3f