typedef NS_ENUM(NSInteger, UIButtonType) {
UIButtonTypeCustom = 0,? ? ? ? ? ? ? ? ? ? ? ? // no button type
UIButtonTypeSystem NS_ENUM_AVAILABLE_IOS(7_0),? // standard system button
UIButtonTypeDetailDisclosure,
UIButtonTypeInfoLight,
UIButtonTypeInfoDark,
UIButtonTypeContactAdd,
UIButtonTypeRoundedRect = UIButtonTypeSystem,? // Deprecated, use UIButtonTypeSystem instead
UIButtonTypeSystem
UIButtonTypeContactAdd
UIButtonTypeInfoDark
UIButtonTypeDetailDisclosure
