Objective c 保存到plist文件问题

由于某种原因，我无法将新数据保存到plist文件。这是我用来保存数据的代码：

   -(void)saveData:(NSMutableDictionary *)dictionaryData toFile:(NSString *)filename {
     NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
     NSString *docDir = [paths objectAtIndex:0];
     NSString *path = [docDir stringByAppendingPathComponent:filename];
     NSMutableArray *data = [[NSMutableArray alloc] initWithContentsOfFile:path];
    [data addObject:dictionaryData];
    [data writeToFile:filename atomically:YES];
     }

这是我用来将文件从捆绑包复制到应用程序目录的代码，以防它不存在：

    -(NSMutableArray *)loadFromFile:(NSString *)filename {
     NSError *error;
     NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
     NSString *docDir = [paths objectAtIndex:0];
     NSString *path = [docDir stringByAppendingPathComponent:filename];
     NSFileManager *fileMgr = [NSFileManager defaultManager];
     if(![fileMgr fileExistsAtPath:path]) {
        NSArray *fileArray = [filename componentsSeparatedByString:@"."];
        NSString *name = [fileArray objectAtIndex:0];
        NSString *ext = [fileArray objectAtIndex:1];
        NSString *bundle = [[NSBundle mainBundle] pathForResource:name ofType:ext];
        [fileMgr copyItemAtPath:bundle toPath:path error:&error];
     }
     NSMutableArray *data = [[NSMutableArray alloc] initWithContentsOfFile:path];
     return data;
     }

由于某些原因，我无法将新数据保存到plist文件。当我尝试将新的NSMutableDictionary对象添加到plist文件（使用saveData:toFile:method）中，然后使用plist文件数据重新加载数组变量时，没有新对象。我做错什么了吗

这是我加载plist文件的方式：

 @property (nonatomic, strong) NSMutableArray *modules;
 @property (nonatomic, strong) NSMutableDictionary *module; 

  - (void)viewDidLoad {
    [super viewDidLoad];

    self.modules = [self loadFromFile:@"ModulesList.plist"];
    self.module = [self.modules objectAtIndex:0];

    for (int i = 0; i < self.modules.count; i++ ) {
        NSLog(@"Modules array from plist file, module at index %i : %@",i, [self.modules         objectAtIndex:i]);
    }

@property（非原子，强）NSMutableArray*模块；
@属性（非原子，强）NSMutableDictionary*模块；
-（无效）viewDidLoad{
[超级视图下载]；
self.modules=[self-loadFromFile:@“ModulesList.plist”]；
self.module=[self.modules objectAtIndex:0]；
对于（int i=0；i

出于测试目的，我使用以下代码添加新的模块对象：

    - (IBAction)leftButton:(id)sender {
      NSString *mytitle = [[NSString alloc] initWithFormat:@"my title"];
      NSString *myauthor = [[NSString alloc] initWithFormat:@"my author2"];
      NSUInteger myean = 22023423;
      NSString *mytitle2 = [[NSString alloc] initWithFormat:@"my title 2"];
      NSString *myauthor2 = [[NSString alloc] initWithFormat:@"my author2"];
      NSUInteger myean2 = 29032432;
      NSString *mytitle3 = [[NSString alloc] initWithFormat:@"my title 3"];
      NSString *myauthor3 = [[NSString alloc] initWithFormat:@"my author 3"];
      NSUInteger myean3 = 21023423;


      NSMutableDictionary *mybook = [[NSMutableDictionary alloc] init];
      NSMutableDictionary *mybook2 = [[NSMutableDictionary alloc] init];
      NSMutableDictionary *mybook3 = [[NSMutableDictionary alloc] init];

      [mybook setObject:mytitle forKey:@"title"];
      [mybook setObject:myauthor forKey:@"author"];
      [mybook setObject:[NSNumber numberWithInteger:myean] forKey:@"ean"];

      [mybook2 setObject:mytitle2 forKey:@"title"];
      [mybook2 setObject:myauthor2 forKey:@"author"];
      [mybook2 setObject:[NSNumber numberWithInteger:myean2] forKey:@"ean"];

      [mybook3 setObject:mytitle3 forKey:@"title"];
      [mybook3 setObject:myauthor3 forKey:@"author"];
      [mybook3 setObject:[NSNumber numberWithInteger:myean3] forKey:@"ean"];

      NSMutableArray *mybooks = [[NSMutableArray alloc] init];

      [mybooks addObject:mybook];
      [mybooks addObject:mybook2];
      [mybooks addObject:mybook3];

      [self.module setObject:mybooks forKey:@"books"];
      [self.modules addObject:self.module];


      for (int i = 0; i < self.modules.count; i++ ) {
          NSLog(@"Modules array after add operation, module at index: %i: %@",i, [self.modules objectAtIndex:i]);
}

      [self saveData:self.module toFile:@"ModulesList.plist"];   
   }

-（iAction）leftButton:（id）发送者{
NSString*mytitle=[[NSString alloc]initWithFormat:@“我的标题”]；
NSString*myauthor=[[NSString alloc]initWithFormat:@“my author2”]；
nsu=22023423；
NSString*mytitle2=[[NSString alloc]initWithFormat:@“我的标题2]”；
NSString*myauthor2=[[NSString alloc]initWithFormat:@“my author2”]；
NSU整数myean2=29032432；
NSString*mytitle3=[[NSString alloc]initWithFormat:@“我的标题3]”；
NSString*myauthor3=[[NSString alloc]initWithFormat:@“我的作者3”]；
nsuan3=21023423；
NSMutableDictionary*mybook=[[NSMutableDictionary alloc]init]；
NSMutableDictionary*mybook2=[[NSMutableDictionary alloc]init]；
NSMutableDictionary*mybook3=[[NSMutableDictionary alloc]init]；
[mybook setObject:mytitle forKey:@“title”]；
[mybook setObject:myauthor forKey:@“author”]；
[mybook setObject:[NSNumber numberWithInteger:myean]forKey:@“ean”]；
[mybook2 setObject:mytitle2 forKey:@“标题”]；
[mybook2 setObject:myauthor2 forKey:@“作者”]；
[mybook2 setObject:[NSNumber numberWithInteger:myean2]forKey:@“ean”]；
[mybook3 setObject:mytitle3 forKey:@“title”]；
[mybook3 setObject:myauthor3 forKey:@“作者”]；
[mybook3 setObject:[NSNumber numberWithInteger:myean3]forKey:@“ean”]；
NSMutableArray*mybooks=[[NSMutableArray alloc]init]；
[mybooks添加对象：mybook]；
[mybooks addObject:mybook2]；
[mybooks添加对象：mybook3]；
[self.module setObject:mybooks forKey:@“books”]；
[self.modules添加对象：self.module]；
对于（int i=0；i

当我使用按钮操作从plist重新加载self.modules数组时，我的新数据不存在：

       - (IBAction)reload:(id)sender {
         self.modules = [self loadFromFile:@"ModulesList.plist"];
         for (int i = 0; i < self.modules.count; i++ ) {
             NSLog(@"RELOAD: Modules array from plist file, module at index %i : %@",i,[self.modules objectAtIndex:i]);
         }

   }

-（iAction）重新加载：（id）发送方{
self.modules=[self-loadFromFile:@“ModulesList.plist”]；
对于（int i=0；i

---

这是我的plist文件的屏幕截图：

Add

NSLog（“path='%@'，path）

在

initWithContentsOfFile:

调用并发布什么是日志。还要在

copyItemAtPath:

call.log消息：path:/var/mobile/Applications/68825CED-FED7-41F7-BAEE-F1D3E0A9299E/Documents/ModulesList.plistAnd中添加错误检查

copyItemAtPath:

成功吗？是的，没有错误