【代码笔记】登陆单例

#import <Foundation/Foundation.h>

@interface UserInfo : NSObject

+ (id)sharedManager;

@property (nonatomic , retain) NSString* username;
@property (nonatomic , retain) NSString* password;

@end

#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

#import <UIKit/UIKit.h>

@interface RootViewController : UIViewController

@end

#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]);

}

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