NSKeyedArchiver保存文件

    //=================NSKeyedArchiver========================

    NSString *saveStr1 =@"This is";

    NSString *saveStr2 =@"Data";

    NSArray *array = [NSArray arrayWithObjects:saveStr1, saveStr2, nil];

    //----Save

    //合成完整路徑

    NSString *Path =[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES) objectAtIndex:0];

    NSString *filename = [Path stringByAppendingPathComponent:@"saveDatatest"];

    [NSKeyedArchiver archiveRootObject:array toFile:filename];

    //----Load

    array = [NSKeyedUnarchiver unarchiveObjectWithFile: filename];