一，工程图。
二，代码。
UserInfo.h
#import <Foundation/Foundation.h> @interface UserInfo : NSObject + (id)sharedManager; @property (nonatomic , retain) NSString* username;
@property (nonatomic , retain) NSString* password; @end
UserInfo.m
#import "UserInfo.h" static UserInfo * userInfo; @implementation UserInfo #pragma mark - 获取单例
+ (id)sharedManager{
if (!userInfo) {
userInfo = [[UserInfo alloc]init];
}
return userInfo;
} @end
RootViewController.h
#import <UIKit/UIKit.h> @interface RootViewController : UIViewController @end
RootViewController.m
#import "RootViewController.h"
//加入头文件
#import "UserInfo.h" @interface RootViewController () @end @implementation RootViewController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
} - (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view. //给单例的变量赋值
[[UserInfo sharedManager] setUsername:@"李华"];
[[UserInfo sharedManager] setPassword:@"123456"]; //打印单例的值
NSLog(@"---userName----%@",[[UserInfo sharedManager] username]);
NSLog(@"------password---%@",[[UserInfo sharedManager] password]); }
三，输出。
2015-10-14 15:09:55.922 登陆单例[3940:183668] ---userName----李华
2015-10-14 15:09:55.923 登陆单例[3940:183668] ------password---123456