OC枚举定义使用

 定义枚举.h中： 

#import <Foundation/Foundation.h>


 // C语言枚举定义
//typedef enum{
//       XMGTopicTypeImage=10,     //图片
//       XMGTopicTypeWord=29,  // 段子
//       XMGTopicTypeVoice=31,   // 声音
//       XMGTopicTypeVideo=41,   ///视频
//} XMGTopicType;



// IOS 新的推荐写法
typedef NS_ENUM(NSUInteger, XMGTopicType) {
    XMGTopicTypeImage=10,     //图片
    XMGTopicTypeWord=29,  // 段子
    XMGTopicTypeVoice=31,   // 声音
    XMGTopicTypeVideo=41,   ///视频
} ;


@interface Person : NSObject

-(void ) show :(XMGTopicType) xmgtopicType;

@end

  .m中写法： 

#import "Person.h"
@implementation Person

-(void ) show :(XMGTopicType) xmgtopicType{
    switch (xmgtopicType) {
        case XMGTopicTypeVoice:
            NSLog(@"%@",@"XMGTopicTypeVoice");
            break;
        case XMGTopicTypeImage:
            NSLog(@"%@",@"XMGTopicTypeImage");
            break;
        case XMGTopicTypeWord:
            NSLog(@"%@",@"XMGTopicTypeWord");
            break;
        case XMGTopicTypeVideo:
            NSLog(@"%@",@"XMGTopicTypeVideo");
            break;
    }
}

@end

使用枚举： 

 导入Person.h头文件，那么枚举类型自动导入： 

- (IBAction)showError:(id)sender {

    
    Person* person =[[Person alloc] init];
    
    [person  show:XMGTopicTypeImage];
    
}