iOS TableView实现QQ好友列表（一）

一，创建项目

二，创建所需属性及实现列表

首先给ViewController创建两个属性

    UITableView *tableView;//展示列表
    NSArray *titleArray;//第一层列表需要展示的数据

初始化

    tableView=[[UITableView alloc]initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT)];
    tableView.showsVerticalScrollIndicator=NO;
    tableView.separatorStyle=UITableViewCellSeparatorStyleSingleLine;
    [self.view addSubview:tableView];

<span style="white-space:pre">	</span>titleArray=[[NSArray alloc]initWithObjects:@"朋友",@"亲戚",@"同学",@"驴友",@"论坛好友", nil];

给ViewController 添加TableView 相关的协议

@interface ViewController ()<UITableViewDataSource,UITableViewDelegate>
{
    UITableView *tableView;//展示列表
    NSArray *titleArray;//第一层列表需要展示的数据

}

实现相关协议

#pragma mark --tableViewDelegate
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    //返回列表的行数
    return titleArray.count;
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return 0;
}
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
    return 50;
}
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
    UIView *view=[[UIView alloc]initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, 30)];

    UILabel *titleLabel=[[UILabel alloc]initWithFrame:CGRectMake(20, 5, SCREEN_WIDTH, 30)];
    titleLabel.text=[titleArray objectAtIndex:section];
    [view addSubview:titleLabel];

    return view;
}

到此为止已经实现了第一层分类列表的实现

接下来 我们实现第二层。比如说展开朋友分组就会出现所有朋友分组下的好友列表

首先创建一个字典用来存储相关信息

    NSArray *friendsArray;//好友列表
    NSArray *familyArray;//亲戚列表
    NSArray *schoolmateArray;//同学列表
    NSArray *friendstravelArray;//驴友列表
    NSArray *xianFriendsArray;//西安好友列表
    NSArray *strangersArray;//陌生人列表

    NSDictionary *dataDic;//第二层需要展示的数据

初始化数据

-(void)initDataSource
{
    titleArray=[[NSArray alloc]initWithObjects:@"朋友",@"亲戚",@"同学",@"驴友",@"西安好友",@"陌生人", nil];

    NSDictionary *dic01=[[NSDictionary alloc]initWithObjectsAndKeys:@"张三丰",@"name",@"男",@"sex", nil];
    NSDictionary *dic02=[[NSDictionary alloc]initWithObjectsAndKeys:@"邓超",@"name",@"男",@"sex", nil];
    NSDictionary *dic03=[[NSDictionary alloc]initWithObjectsAndKeys:@"吴奇隆",@"name",@"男",@"sex", nil];

    friendsArray=[[NSArray alloc]initWithObjects:dic01,dic02,dic03, nil];

    NSDictionary *dic11=[[NSDictionary alloc]initWithObjectsAndKeys:@"爸爸",@"name",@"男",@"sex", nil];
    NSDictionary *dic12=[[NSDictionary alloc]initWithObjectsAndKeys:@"弟弟",@"name",@"男",@"sex", nil];
    NSDictionary *dic13=[[NSDictionary alloc]initWithObjectsAndKeys:@"三哥",@"name",@"男",@"sex", nil];
    NSDictionary *dic14=[[NSDictionary alloc]initWithObjectsAndKeys:@"大伯",@"name",@"男",@"sex", nil];
    NSDictionary *dic15=[[NSDictionary alloc]initWithObjectsAndKeys:@"二舅",@"name",@"男",@"sex", nil];

    familyArray=[[NSArray alloc]initWithObjects:dic11,dic12,dic13,dic14,dic15, nil];

    NSDictionary *dic21=[[NSDictionary alloc]initWithObjectsAndKeys:@"胖子",@"name",@"男",@"sex", nil];
    NSDictionary *dic22=[[NSDictionary alloc]initWithObjectsAndKeys:@"雄哥",@"name",@"男",@"sex", nil];
    NSDictionary *dic23=[[NSDictionary alloc]initWithObjectsAndKeys:@"小六子",@"name",@"男",@"sex", nil];

    schoolmateArray=[[NSArray alloc]initWithObjects:dic21,dic22,dic23, nil];

    NSDictionary *dic31=[[NSDictionary alloc]initWithObjectsAndKeys:@"三炮",@"name",@"男",@"sex", nil];
    NSDictionary *dic32=[[NSDictionary alloc]initWithObjectsAndKeys:@"郑海峰",@"name",@"男",@"sex", nil];
    NSDictionary *dic33=[[NSDictionary alloc]initWithObjectsAndKeys:@"王重阳",@"name",@"男",@"sex", nil];
    NSDictionary *dic34=[[NSDictionary alloc]initWithObjectsAndKeys:@"丘处机",@"name",@"男",@"sex", nil];
    NSDictionary *dic35=[[NSDictionary alloc]initWithObjectsAndKeys:@"吕娜",@"name",@"男",@"sex", nil];
    NSDictionary *dic36=[[NSDictionary alloc]initWithObjectsAndKeys:@"郭金明",@"name",@"男",@"sex", nil];

    friendstravelArray=[[NSArray alloc]initWithObjects:dic31,dic32,dic33,dic34,dic35,dic36, nil];

    NSDictionary *dic41=[[NSDictionary alloc]initWithObjectsAndKeys:@"李晓峰",@"name",@"男",@"sex", nil];
    NSDictionary *dic42=[[NSDictionary alloc]initWithObjectsAndKeys:@"王蒙",@"name",@"男",@"sex", nil];
    NSDictionary *dic43=[[NSDictionary alloc]initWithObjectsAndKeys:@"李建",@"name",@"男",@"sex", nil];

    xianFriendsArray=[[NSArray alloc]initWithObjects:dic41,dic42,dic43, nil];

    NSDictionary *dic51=[[NSDictionary alloc]initWithObjectsAndKeys:@"胡雪",@"name",@"男",@"sex", nil];
    NSDictionary *dic52=[[NSDictionary alloc]initWithObjectsAndKeys:@"张小欢",@"name",@"男",@"sex", nil];
    NSDictionary *dic53=[[NSDictionary alloc]initWithObjectsAndKeys:@"刘丽丽",@"name",@"男",@"sex", nil];

    strangersArray=[[NSArray alloc]initWithObjects:dic51,dic52,dic53, nil];

    dataDic=[[NSDictionary alloc]initWithObjectsAndKeys:friendsArray,[titleArray objectAtIndex:0],familyArray,[titleArray objectAtIndex:1],schoolmateArray,[titleArray objectAtIndex:2],friendstravelArray,[titleArray objectAtIndex:3],xianFriendsArray,[titleArray objectAtIndex:4], strangersArray,[titleArray objectAtIndex:5], nil];

}

实现以下几个代理方法

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

    NSString *str=[titleArray objectAtIndex:indexPath.section];

    NSArray *arr=[dataDic objectForKey:str];

    static NSString *CellIdentifier = @"MainCell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    cell=nil;
    if (cell == nil) {
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];

        cell.selectionStyle = UITableViewCellSelectionStyleGray;
    }

    UILabel *userLabel=[[UILabel alloc]initWithFrame:CGRectMake(30, 5, SCREEN_WIDTH, 30)];
    userLabel.text=[[arr objectAtIndex:indexPath.row] valueForKey:@"name"];
    [cell.contentView addSubview:userLabel];
    return cell;

}

到目前位置 效果如下：

这节我们先讲到这里，下节我们将实现好友列表的丰富（包括头像，签名等）

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