iOS 操作文件

保存

+(void)saveData:(NSMutableArray *)stuData

{

    NSLog(@"save");

    //设置文件保存的路径

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    //获取documents路径

    NSString *documentPath = [paths lastObject];

    //定义全路径

    NSString *savePath = [documentPath stringByAppendingPathComponent:@"student1.plist"];

    NSMutableArray * stuMutableArray = [NSMutableArray array];

    for (int i = 0; i<stuData.count; i++) {

        NSDictionary * stuDic = [stuData objectAtIndex:i];

        NSMutableDictionary * stuMutableDic = [NSMutableDictionary dictionaryWithDictionary:stuDic];

        NSString * trueName = [stuMutableDic objectForKey:@"TRUENAME"];

  

        if ([trueName isEqual:[NSNull null]])

        {

            trueName = @"";

        }

        else if ([trueName isKindOfClass:[NSNull class]])

        {

            trueName = @"";

        }

        else if (trueName==nil)

        {

            trueName = @"无";

        }

        [stuMutableDic setObject:trueName forKey:@"TRUENAME"];

        stuDic = stuMutableDic;

        [stuMutableArray addObject:stuDic];

    }

    [stuMutableArray writeToFile:savePath atomically:YES];

  }

打开：

+(NSArray *)getData

{

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    //获取documents路径

    NSString *documentPath = [paths lastObject];

    //定义全路径

    NSString *savePath = [documentPath stringByAppendingPathComponent:@"student1.plist"];

    

    //从文件读取数据到字典

   return [NSArray arrayWithContentsOfFile:savePath];

}