UIButton的正确层级结构是()
UIButton >UIControl > UIView > UIResponder > NSObject
UIButton > UIView > UIControl > UIResponder > NSObject
UIButton > UIView > UIResponder > UIControl > NSObject
UIButton > UIView > UIResponder > NSObject
这道题你会答吗?花几分钟告诉大家答案吧!
扫描二维码,关注牛客网
下载牛客APP,随时随地刷题