Minor refactoring.
Minor refactoring.

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