iOS学习笔记3—NSKeyedUnarchiver进行本地数据的读取|存储

//收藏数据读取 与更新

- (void)replaceCurrentViewData :(NSMutableArray *)array

{

DWUser *loginUser = ((AppDelegate* )[UIApplication sharedApplication].delegate).appUser;

NSMutableDictionary *tempDic= [NSKeyedUnarchiver unarchiveObjectWithData:[NSData dataWithContentsOfFile:[Utils applicationDocumentsDirectory:kCollectFilePath]]];

[tempDic setObject:array forKey:loginUser.username];

NSData *data = [NSKeyedArchiver archivedDataWithRootObject:tempDic];

[data writeToFile:[Utils applicationDocumentsDirectory:kCollectFilePath] atomically:YES];

}

沙盒路径的获取

+(NSString *)applicationDocumentsDirectory :(NSString*)filename

{

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,

NSUserDirectory,

YES);

NSString *basePath = ([paths count] >0)?[paths objectAtIndex:0]:nil;

NSString *appendPath = filename;

return [basePath stringByAppendingPathComponent:appendPath];

}