iOS-------iOS编程之NSUserDefault_ios userdefault 封装-优快云博客

本文详细介绍了如何使用NSUserDefault来存储和读取用户配置信息，包括初始化、设置值和获取值的过程，以及如何利用NSHomeDirectory()获取用户主目录。

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//
//  AppDelegate.h
//  NSUserDefault
//
//  Created by l on 15/9/17.
//  Copyright (c) 2015年 . All rights reserved.
//

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;


@end







//
//  AppDelegate.m
//  NSUserDefault
//
//  Created by  on 15/9/17.
//  Copyright (c) 2015年 . All rights reserved.
//

#import "AppDelegate.h"

@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.

    //NSUserDefault
    //主要用来存储 用户相关的配置.
    //是一个轻量级的数据库,用plist文件存储

    //NSUserDefault 是一个单例,每次获取到的都是同一个对象

    NSString *userName = @"huolianyuan";
    NSString *pwd = @"shenjiajia";

    //1.创建 NSUserDefault对象
    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];

    //2.赋值
    [userDefaults setObject:userName forKey:@"userName"];
    [userDefaults setObject:pwd forKey:@"pwd"];



    return YES;
}







//////////////////////////////////////////////////////////////



//
//  ViewController.h
//  NSUserDefault
//
//  Created by l on 15/9/17.
//  Copyright (c) 2015年. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController


@end






//
//  ViewController.m
//  NSUserDefault
//
//  Created by l on 15/9/17.
//  Copyright (c) 2015年 . All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];


    //1.获取userDefault 对象
    NSUserDefaults *userDefault = [NSUserDefaults standardUserDefaults];

    //2.取值
    NSString *userName = [userDefault objectForKey:@"userName"];

    NSString *pwd = [userDefault objectForKey:@"pwd"];

    NSLog(@"%@ %@", userName, pwd);

    NSLog(@"%@", NSHomeDirectory());



    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end