//发送
let userInfo = [ShowPhotoBrowserIndexKey : indexPath, ShowPhotoBrowserUrlsKey : picURLs]
NSNotificationCenter.defaultCenter().postNotificationName(ShowPhotoBrowserNote, object: nil, userInfo: userInfo)
//接受
NSNotificationCenter.defaultCenter().addObserver(self, selector: "showPhotoBrowser:", name: ShowPhotoBrowserNote, object: nil)