Added a function to sync fetch the full-screen image and the original image.
Added a function to sync fetch the full-screen image and the original image.

gorjuspixels/DKImagePickerController,jpipard/DKImagePickerController,North-American-Signs/DKImagePickerController,metasmile/DKImagePickerController,zhangao0086/DKImagePickerController,jpipard/DKImagePickerController,metasmile/DKImagePickerController,North-American-Signs/DKImagePickerController,zhangao0086/DKImagePickerController,gorjuspixels/DKImagePickerController