iphone - 在我的对象类中使用 typedef 枚举

Question

我有一个 People 类，其中包含关于一个人的各种信息。我希望能够确定这是什么样的人，所以我想我会尝试为此使用 typedef 枚举，因为我之前已经看到它完成了，这似乎是最干净的解决方案。但是，我不确定如何声明它，然后将其变成属性。

.h

typedef enum {
    kPersonTypeFaculty,
    kPersonTypeStaff,
    kPersonTypeSearch
} personType;

@interface Person : NSObject {
    NSString *nameFirst;
    NSString *nameLast;
    NSString *email;
    NSString *phone;
    NSString *room;
    NSString *status;
    NSString *building;
    NSString *department;
    NSString *imageURL;
    NSString *degree;
    NSString *position;
    NSString *bio;
    NSString *education;
}

@property (nonatomic, retain) NSString *nameFirst;
@property (nonatomic, retain) NSString *nameLast;
@property (nonatomic, retain) NSString *email;
@property (nonatomic, retain) NSString *phone;
@property (nonatomic, retain) NSString *room;
@property (nonatomic, retain) NSString *status;
@property (nonatomic, retain) NSString *building;
@property (nonatomic, retain) NSString *department;
@property (nonatomic, retain) NSString *imageURL;
@property (nonatomic, retain) NSString *degree;
@property (nonatomic, retain) NSString *position;
@property (nonatomic, retain) NSString *bio;
@property (nonatomic, retain) NSString *education;

@end

.m

#import "Person.h"


@implementation Person

@synthesize nameFirst, nameLast, email, phone, room, status, building, department, imageURL, degree, position, bio, education;

- (void)dealloc {
    [nameFirst release];
    [nameLast release];
    [email release];
    [phone release];
    [room release];
    [status release];
    [building release];
    [department release];
    [imageURL release];
    [degree release];
    [position release];
    [bio release];
    [education release];
    [super dealloc];
}

@end

我希望能够做这样的事情:

Person *person = [[[Person alloc] init] autorelease];
person.nameFirst = @"Steve";
person.nameLast = @"Johnson";
person.personType = kPersonTypeStaff;

我是否遗漏了这个想法的关键部分？

Answer 1

您可以像定义任何原始类型(如 int 或 float)一样定义它。当您使用 typedef 时，您是在告诉编译器这个名称是代表它的类型。因此，您将添加一个具有该类型的实例变量(我在帖子中将类型大写以将其与变量或属性区分开来):

personType personType;

然后添加属性定义:

@property (nonatomic) personType personType;

然后合成并使用它:

@synthesize personType;

self.personType = kPersonTypeStaff;

枚举类型实际上是某种整数类型，它包含枚举的所有值。通过使用 typedef，您可以指定此整数应该是枚举中的常量之一，而编译器可以帮助强制执行此操作。但是，除了变量类型之外，您对待它的方式与对待 int 类型的方式完全相同。