部分源码参考 tilltue,感谢作者开源
因原项目使用了UIStackView和Live Photo高版本 API，只支持iOS9以上， 所以在作者原项目做了修改，支持iOS8.0+
To run the example project, clone the repo, and run pod install from the Example directory first.
iOS8.0+
CMPhotoAlbum is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod "CMPhotoAlbum"Moyun, moyunmo@hotmail.com
CMPhotoAlbum is available under the MIT license. See the LICENSE file for more info.