在工具上一切正常，真机调试就成黑的了，路径是canvasToTempFilePath生成的，工具上是http开头，真机是wxfile:，不知道是不是这个原因

wx.getImageInfo({

src: this.data.imagePath,

success(res) {

var paths = res.path

wx.saveImageToPhotosAlbum({

filePath: paths,

success(res) {

wx.showToast({

title: ‘保存成功’,

})

console.log(res.errMsg)

},

fail(res) {

console.log(res.errMsg)

}

})

}

})