【代码笔记】iOS-3个section，每个都有header.

一，效果图：

二，工程目录。

三，代码

RootViewController.h

#import <UIKit/UIKit.h>

@interface RootViewController : UIViewController
<UITableViewDataSource,UITableViewDelegate>
{
    UITableView *MyTableView;
}
@end

RootViewController.m

#import "RootViewController.h"

@interface RootViewController ()

@end

@implementation RootViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    //更新背景图
    [self initBackGroundView];
}
#pragma -mark -functions
-(void)initBackGroundView
{
    //tableView
    MyTableView=[[UITableView alloc]initWithFrame:CGRectMake(0, 50, self.view.frame.size.width, 400) style:UITableViewStylePlain];
    MyTableView.delegate=self;
    MyTableView.dataSource=self;
    [self.view addSubview:MyTableView];
}
#pragma -mark -UITableViewDelegate
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return 1;
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 105;
}
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
    return 30;
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 3;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:@"ID"];
    if ( cell== nil) {
        cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:@"ID"];
    }
    if (indexPath.section==0) {
        cell.textLabel.text=@"0";
        cell.backgroundColor=[UIColor greenColor];

    }
    else if(indexPath.section==1)
    {
        cell.textLabel.text=@"1";
        cell.backgroundColor=[UIColor redColor];
    }
    else if(indexPath.section==2)
    {
        cell.textLabel.text=@"2";
        cell.backgroundColor=[UIColor orangeColor];
    }
    return cell;

}
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
    UIView *view=[[UIView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 30)];
    view.backgroundColor=[UIColor blackColor];

    UILabel *label=[[UILabel alloc]initWithFrame:CGRectMake(10, 0, 100, 30)];
    label.backgroundColor=[UIColor clearColor];
    label.textColor=[UIColor whiteColor];
    if (section==0) {
        label.text=@"电影";
    }else if(section==1)
    {
        label.text=@"电视剧";
    }else if(section==2)
    {
        label.text=@"动漫";
    }
    [view addSubview:label];
    return  view;
}