枚举和结构体

//推荐的定义枚举类型的方式
typedef NS_ENUM(NSInteger, RWTLeftMenuTopItemType) {
RWTLeftMenuTopItemMain,
RWTLeftMenuTopItemShows,
RWTLeftMenuTopItemSchedule
};
typedef NS_ENUM(NSInteger, RWTGlobalConstants) {
RWTPinSizeMin = 1,
RWTPinSizeMax = 5,
RWTPinCountMin = 100,
RWTPinCountMax = 500,
};
//不推荐的方式
enum GlobalConstants {
kMaxPinSize = 5,
kMaxPinCount = 500,
};

//1.定义一个Sample结构体
struct Sample {
int a;
int b;
int c;
};
//初始化的时候，可以这样赋值
struct Sample sampleStruct = {1, 2, 1};
NSLog(@"sampleStruct中的值%d",sampleStruct.a );
//2 .定义一个Sample结构体
struct Sample{
int a;
int b;
int c;
}sampleStruct;
typedef struct Sample MySampleStruct;
//以后用这个结构体，就可以直接用MySampleStruct去定义了
MySampleStruct samDefineStructVarible = {1,2,1};
samDefineStructVarible.a = 1;
samDefineStructVarible.b =2;
samDefineStructVarible.c = 3;