IOS 登录信息类（使用单例）

WCUserInfo.h

#import <Foundation/Foundation.h>
#import "Singleton.h"

@interface WCUserInfo : NSObject

singleton_interface(WCUserInfo);

@property (nonatomic, copy) NSString *user;//用户名
@property (nonatomic, copy) NSString *pwd;//密码

/**
 *  登录的状态 YES 登录过/NO 注销
 */
@property (nonatomic, assign) BOOL  loginStatus;

@property (nonatomic, copy) NSString *registerUser;//注册的用户名
@property (nonatomic, copy) NSString *registerPwd;//注册的密码

/**
 *  从沙盒里获取用户数据
 */
-(void)loadUserInfoFromSanbox;

/**
 *  保存用户数据到沙盒

 */
-(void)saveUserInfoToSanbox;
@end

WCUserInfo.m

#import "WCUserInfo.h"

#define UserKey @"user"
#define LoginStatusKey @"LoginStatus"
#define PwdKey @"pwd"

@implementation WCUserInfo

singleton_implementation(WCUserInfo)

-(void)saveUserInfoToSanbox{

    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setObject:self.user forKey:UserKey];
    [defaults setBool:self.loginStatus forKey:LoginStatusKey];
    [defaults setObject:self.pwd forKey:PwdKey];
    [defaults synchronize];

}

-(void)loadUserInfoFromSanbox{
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    self.user = [defaults objectForKey:UserKey];
    self.loginStatus = [defaults boolForKey:LoginStatusKey];
    self.pwd = [defaults objectForKey:PwdKey];
}

@end