UITableView

AppDelegate.h

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;


@end

AppDelegate.m

#import "AppDelegate.h"
#import "RootViewController.h"

@interface AppDelegate ()

@end

@implementation AppDelegate
- (void)dealloc
{
    [_window release];
    [super dealloc];
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];

    [_window release];

    RootViewController *rootVC = [[RootViewController alloc] init];
    UINavigationController *naVC = [[UINavigationController alloc] initWithRootViewController:rootVC];
    self.window.rootViewController = naVC;
    [rootVC release];
    [naVC release];


    return YES;
}

RootViewController.h

#import <UIKit/UIKit.h>

@interface RootViewController : UIViewController

@end

RootViewController.m

#import "RootViewController.h"

#define WIDTH self.view.frame.size.width
#define HEIGHT self.view.frame.size.height

@interface RootViewController ()<UITableViewDataSource, UITableViewDelegate>

@property(nonatomic, retain)NSMutableArray *arr;

@end

@implementation RootViewController

- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        self.arr = [NSMutableArray arrayWithObjects:@"宋江", @"卢俊义", @"吴用", @"公孙胜", @"关胜", @"林冲", @"秦明" ,@"呼延灼" , @"花荣",@"柴进", @"李应", @"朱仝",@"鲁智深",@"武松", nil];
    }
    return self;
}

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

    self.view.backgroundColor = [UIColor whiteColor];
    //  当页面只有一个tableView能滚动的视图的时候, 导航栏会自动把坐标系的起点放到(0, 64)的位置, 既能保留半透明效果, 也方便视图的布局
    self.automaticallyAdjustsScrollViewInsets = NO;

    self.navigationController.navigationBar.translucent = NO;

    //  创建一个UITableView
    //  通过UIView四步创建
    UITableView *tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, HEIGHT) style:UITableViewStylePlain];
    [self.view addSubview:tableView];
    [tableView release];
    tableView.backgroundColor = [UIColor yellowColor];

    //  行高 default 44
    tableView.rowHeight = 80;

    //  签订代理人, dataSource
    tableView.dataSource = self;

    //  设置代理人
    tableView.delegate = self;


}

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
    UIView *headerView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, 24)] autorelease];
    headerView.backgroundColor = [UIColor redColor];
    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
    button.frame = CGRectMake(300, 0, 50, 24);
    [button setTitle:@"更多" forState:UIControlStateNormal];
    [headerView addSubview:button];


    return headerView;
}
#pragma mark    返回行高
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
    if (indexPath.row % 2 == 0) {
        return 100;
    } else {
        return 150;
    }
}
#pragma mark    设置分区标题高度
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
    return 50;
}

#pragma mark    tableView的点击方法
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

//    NSLog(@"我被点击了");

    NSLog(@"行: %ld", indexPath.row);
    NSLog(@"分区: %ld", indexPath.section);
    NSLog(@"姓名: %@", self.arr[indexPath.row]);
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
    NSLog(@"cell.textLabel.text: %@", cell.textLabel.text);
}

#pragma mark    tableView上的索引
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView {

    return @[@"a", @"2", @"3"];
}
#pragma mark    指定当前的分区个数
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 3;
}
#pragma mark    指定每个分区的标题
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
    if (section == 0) {
        return @"潘金莲";
    } else if(section == 1) {
        return @"阎婆惜";
    } else {
        return @"hehe";
    }

}
#pragma mark    只要操作tableView就会触发这个协议方法, 完成对cell的创建和赋值的作用, 并且用重用的方式完成cell的创建和使用
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    //  创建UITableViewCell
    //  1. 指定一个重用标志的字符串
    static NSString *reuse = @"reuse";
    //  2. tableView根据指定的重用标志, 在重用池里寻找有没有闲置的cell
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reuse];
    //  3. 如果没有闲置的cell, 需要创建一个cell
    if (!cell) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:reuse] autorelease];
        NSLog(@"我被创建了");
    }

    //  cell创建好之后对cell上的属性进行赋值
    cell.textLabel.text = self.arr[indexPath.row];
    cell.detailTextLabel.text = @"222";
    cell.imageView.image = [UIImage imageNamed:@"5.jpg"];

    NSLog(@"%ld", indexPath.row);
    return cell;
}

#pragma mark    这个是dataSource实现的第一个协议方法, 放回每个分区有多少行, 分区默认是1个
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    //  数组元素个数跟行数进行关联
//    return self.arr.count;

    if (section % 2 == 0) {
                return self.arr.count;
            } else {
                return 10;
            }
}