【代码札记】一个tableView,两个section

#import <UIKit/UIKit.h>

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

#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.
    
   //初始化背景色
    [self initBackgroundView];

}
#pragma -mark -funcions
-(void)initBackgroundView
{
    mTableView=[[UITableView alloc] initWithFrame:CGRectMake(0, 40, 320, self.view.bounds.size.height)];
    mTableView.dataSource=self;
    mTableView.delegate=self;
    [self.view addSubview:mTableView];
}
#pragma -mark -UITableViewDelegate
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 2;
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    if (section==0) {
        return 5;
    }else if (section==1){
         return 10;
    }
    return 10;
}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 40;
}

-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    
    static NSString *name=@"nearShop";
    
    UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:name];
    
    if (cell==nil) {
        cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:name];
    }
    
    cell.selectionStyle=UITableViewCellSelectionStyleNone;
    
    if (indexPath.section==0) {
       cell.textLabel.text=@"食品";
    }else if (indexPath.section==1){
       cell.textLabel.text=@"商圈";
    }

    return cell;
}
-(UIView*)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
    UIView* customView =[[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 30.0)] ;
    customView.backgroundColor=[UIColor redColor];
   
    UILabel * headerLabel = [[UILabel alloc] initWithFrame:CGRectZero] ;
    headerLabel.backgroundColor = [UIColor redColor];
    headerLabel.textColor = [UIColor blackColor];
    headerLabel.font = [UIFont boldSystemFontOfSize:15];
    headerLabel.frame = CGRectMake(0.0, 0.0, 320.0, 30.0);
    
    if (section == 0) {
        headerLabel.text=@"热门商区";
    }else if (section == 1){
        headerLabel.text = @"分类";
    }
    
    [customView addSubview:headerLabel];

    return customView;
}