AddressBook通讯录右边索引条

落日映苍穹つ 2023-10-17 05:57 24阅读 0赞

- (void)viewDidLoad
    {
        [super viewDidLoad];
        _table.dataSource = self;
        _table.delegate = self;
        //通过ASCRII码获得26位大写英文字母,将其设置为区头
        _array = [[NSMutableArray alloc]init];
        for (int i = 65; i<65+26; i++)
        {
            unichar ch = i;
            NSString *str = [[NSString alloc]initWithCharacters:&ch length:1];
            [_array addObject:str];
            [str release];
        }
        NSLog(@"%@",_array);
    }
    
    //设置tableView的区头索引条(通讯录右边的索引条)
    - (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView
    {
        return _array;
    }
    
    - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
    {
        return [_array objectAtIndex:section];
    }
    
    - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
    {
        return _array.count;
    }
    
    - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
    {
        if (section % 3 == 0)
        {
            return 5;
        }
        else if (section % 3 == 1)
        {
            return 7;
        }
        else
        {
            return 9;
        }
    }
    
    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
        UITableViewCell *cell = [_table dequeueReusableCellWithIdentifier:@"cell"];
        if (!cell)
        {
            cell = [[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"]autorelease];
        }
        cell.textLabel.text = [NSString stringWithFormat:@"第%lu行",indexPath.row];
        return cell;
    }

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