objective-c - 如何让对象在整个应用程序中保持事件状态？

Question

这就是我想做的..
我有一个名为 userInfo 的类。我在另一个名为 LoginInfo 的类中创建了该对象的实例。我想让这个实例保持事件状态并可供所有其他类访问，直到应用程序处于事件状态为止...

我该如何实现这个目标？我在某处读到我可以用单例类来做到这一点。但我不知道它们是什么......我对 cocoa 很陌生......请指导......

提前致谢..

<小时/>

@interface UserInfo : NSObject {
    NSString * firstName;
    NSString * lastName;
    NSString * uID;
    NSString * password;
    NSString * userType;

}

-(id)initWithFirstName:(NSString *)fname andLastName:(NSString *)lname andUID:(NSString *)userID andPassword:(NSString *)pwd andUserType:(NSString *)type;
@property (readwrite, copy) NSString * firstName;
@property (readwrite, copy) NSString * lastName;
@property (readwrite, copy) NSString * uID;
@property (readwrite, copy) NSString * password;
@property (readwrite, copy) NSString * userType;

@end



#import "UserInfo.h"


@implementation UserInfo

-(id)initWithFirstName:(NSString *)fname andLastName:(NSString *)lname andUID:(NSString *)usid andPassword:(NSString *)pwd andUserType:(NSString *)type{
    self=[super init];
    if (self) {
        self.firstName=fname;
        self.lastName=lname;
        self.uID=usid;
        self.password=pwd;
        self.userType=type;
        }
    return self;
}

@synthesize firstName;
@synthesize lastName;
@synthesize uID;
@synthesize password;
@synthesize userType;


@end

这是我想要创建单例的类...请指导我必须进行哪些更改..我想使用自定义构造函数...很抱歉将此代码作为答案。但我无法在评论中得到它......

Answer 1

什么是单例: Yeah.. I know.. I'm a simpleton.. So what's a Singleton?

如何在 Objective-C 中实现它: What should my Objective-C singleton look like?