NSUserDefaults类似android中的SharedPreferences,可以把数据持久化到设备中。
//
// ViewController.h
// Data
//
// Created by 方 海鹏 on 12-10-28.
// Copyright (c) 2012年 方 海鹏. All rights reserved.
//
#import
@interface ViewController : UIViewController
@property (strong, nonatomic) IBOutlet UILabel *label;
@property (strong,nonatomic) NSUserDefaults *userDefaults;
- (IBAction)read:(id)sender;
- (IBAction)write:(id)sender;
@end
//
// ViewController.m
// Data
//
// Created by 方 海鹏 on 12-10-28.
// Copyright (c) 2012年 方 海鹏. All rights reserved.
//
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
_userDefaults=[NSUserDefaults standardUserDefaults];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
_userDefaults=nil;
}
/*
读
*/
- (IBAction)read:(id)sender {
NSString *string=[_userDefaults valueForKey:@"string"];
_label.text=string;
}
/*
写
*/
- (IBAction)write:(id)sender {
[_userDefaults setObject:@"保存" forKey:@"string"];
[_userDefaults synchronize];
}
@end