iOS 对plist文件进行读写,增删改查的实例

对plist文件进行读写

//获取路径对象
  NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
  NSString *path = [pathArray objectAtIndex:0];
  //获取文件的完整路径
  NSString *filePatch = [path stringByAppendingPathComponent:@"column.plist"];

  NSLog(@"%@",filePatch);

  //写入数据到plist文件
  NSMutableDictionary *dic1 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"小小虎",@"name",@"5",@"age",@"boy",@"sex",nil];

  NSMutableDictionary *dic2 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"小小兮",@"name",@"6",@"age",@"girl",@"sex",nil];

  //将上面2个小字典保存到大字典里面
  NSMutableDictionary *dataDic = [NSMutableDictionary dictionary];
  [dataDic setObject:dic1 forKey:@"一年级"];
  [dataDic setObject:dic2 forKey:@"二年级"];
  //写入plist里面
  [dataDic writeToFile:filePatch atomically:YES];


  //读取plist文件的内容
  NSMutableDictionary *dataDictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:filePatch];
  NSLog(@"---plist一开始保存时候的内容---%@",dataDictionary); 

对pilst文件进行修改

//修改字典里面的内容,先按照结构取到你想修改内容的小字典
  NSMutableDictionary *dd = [dataDictionary objectForKey:@"一年级"];
  [dd setObject:@"我改名字了哦" forKey:@"name"];
  [dd setObject:@"我添加的新内容" forKey:@"content"];
  [dd removeObjectForKey:@"age"];

  //修改成功以后，将这个小字典重新添加到大字典里面
  [dataDictionary setObject:dd forKey:@"一年级"];

  [dataDictionary writeToFile:filePatch atomically:YES];
  NSLog(@"---plist做过操作之后的字典里面内容---%@",dataDictionary); 

删除

//清除plist文件，可以根据我上面讲的方式进去本地查看plist文件是否被清除
  NSFileManager *fileMger = [NSFileManager defaultManager];

  NSString *xiaoXiPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"xiaoxi.plist"];

  //如果文件路径存在的话
  BOOL bRet = [fileMger fileExistsAtPath:xiaoXiPath];

  if (bRet) {

    NSError *err;

    [fileMger removeItemAtPath:xiaoXiPath error:&err];
  } 

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