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[操作系统]【代码笔记】登陆单例


一,工程图。

二,代码。

UserInfo.h

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#import <Foundation/Foundation.h>@interface UserInfo : NSObject+ (id)sharedManager;@property (nonatomic , retain) NSString* username;@property (nonatomic , retain) NSString* password;@end
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UserInfo.m

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#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
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RootViewController.h

#import <UIKit/UIKit.h>@interface RootViewController : UIViewController@end

 

RootViewController.m

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#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]);    }
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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