/// Default is NO, if set YES, will show the image's selected index.
/// 默认为NO,如果设置为YES,会显示照片的选中序号
@property(assign,nonatomic)BOOLshowSelectedIndex;
/// Default is NO, if set YES, when selected photos's count up to maxImagesCount, other photo will show float layer what's color is cannotSelectLayerColor.
/// Icon theme color, default is green color like wechat, the value is r:31 g:185 b:34. Currently only support image selection icon when showSelectedIndex is YES. If you need it, please set it as soon as possible