定义参数

IBOutlet

@property(weak, nonatomic) IBOutlet UIButton *xyt;

int

@property(nonatomic, assign) int index;

NSArray

@property(nonatomic, strong) NSArray *db;

定义模型 一般用copy list map 用strong

@property(nonatomic, copy) NSString *icon;
@property(nonatomic, strong) NSArray *options;