从启动到启动存储nsstring(或其他数据)的快速而肮脏的方法?

使用 NSUserDefaults . 里面有一些密码 this question .

如果你想用夹钳,我想这是最快的方法。使用nscoding还有其他方法可以将数据编码到文件中,但您可能需要自定义数据模型类,这更适合保存不适合指定数据模型的更随机的内容。此外,正如已经指出的,nsuserdefaults也是一个选项

要保存您的工作:

-(void)applicationWillTerminate:(NSNotification *)notification {
   NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
   NSString *documentsDirectory = [paths objectAtIndex:0];
   NSString *filePath = [documentsDirectory stringByAppendingString:@"info.plist"];
   NSMutableArray *array = [[NSMutableArray alloc] init];
// Add the objects you want to save to the array here ex: [array addObject:]
   [array writeToFile:filePath atomically:YES];
   [array release];  }

要恢复保存的文件:

- (void)viewDidLoad {
   NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
   NSString *documentsDirectory = [paths objectAtIndex:0];
   NSString *filePath = [documentsDirectory stringByAppendingString:@"info.plist"];
   if ([[NSFileManager defaultManager] fileExistsAtPath:filePath]) {
       NSArray *array = [[NSArray alloc] initWithContentsOfFile:filePath];
    // Set your vaiables here in the order that you saved them ex. var = [array objectAtIndex:]
       [array release];
   }
   UIApplication *app = [UIApplication sharedApplication];
   [[NSNotificationCenter defaultCenter] addObserver:self 
                                         selector:@selector(applicationWillTerminate:) 
                                             name:UIApplicationWillTerminateNotification 
                                           object:app];

    [super viewDidLoad];}

基本上,当您的应用程序即将退出时,您将创建并排列要保存的对象,并将其写入文件;当您的应用程序再次启动时,您将该文件重新读取到一个数组中,并根据保存的顺序分配变量。然后设置它,这样当应用程序发送其uiapplicationwillterminatenotification时,它会执行代码以将(大概)修改过的变量保存回文件中。

你可能想要 NSDefaults 检查一下 User Defaults Programming Topics 指南。