Minor code refactoring
Minor code refactoring

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