Minor refactoring
Minor refactoring

dredenba/DZNPhotoPickerController,imjerrybao/DZNPhotoPickerController,lichuanjun/DZNPhotoPickerController,taojack/DZNPhotoPickerController,topfreegames/TFGPhotoPickerController,imjerrybao/DZNPhotoPickerController,dennislysenko/DZNPhotoPickerController,jonesgithub/DZNPhotoPickerController,ahbou/DZNPhotoPickerController,imjerrybao/DZNPhotoPickerController,jonesgithub/DZNPhotoPickerController,imjerrybao/DZNPhotoPickerController,taojack/DZNPhotoPickerController,taojack/DZNPhotoPickerController,ndnguru/DZNPhotoPickerController,taojack/DZNPhotoPickerController,dzenbot/DZNPhotoPickerController,jonesgithub/DZNPhotoPickerController,jonesgithub/DZNPhotoPickerController