UI4_UITableViewSectionIndex

//  AppDelegate.m

//  UI4_UITableViewSectionIndex

//

//  Created by zhangxueming on 15/7/14.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import "AppDelegate.h"

#import "ViewController.h"



@interface AppDelegate ()



@end



@implementation AppDelegate





- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // Override point for customization after application launch.

    ViewController *root = [[ViewController alloc] init];

    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:root];

    self.window.rootViewController = nav;

    self.window.backgroundColor = [UIColor whiteColor];

    [self.window makeKeyAndVisible];

    

    return YES;

}

 

//

//  ViewController.h

//  UI4_UITableViewSectionIndex

//

//  Created by zhangxueming on 15/7/14.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import <UIKit/UIKit.h>



@interface ViewController : UIViewController<UITableViewDataSource, UITableViewDelegate>



@property (strong, nonatomic)UITableView *tableView;

@property (strong, nonatomic)NSMutableArray *dataList;



@end







//

//  ViewController.m

//  UI4_UITableViewSectionIndex

//

//  Created by zhangxueming on 15/7/14.

//  Copyright (c) 2015年 zhangxueming. All rights reserved.

//



#import "ViewController.h"



@interface ViewController ()



@end



@implementation ViewController



- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    [self creatUI];

    [self creatDataSource];

}



- (void)creatDataSource

{

    _dataList = [NSMutableArray array];

    for (int i='A'; i<='Z'; i++) {

        NSInteger count = arc4random()%10+1;

        NSMutableArray *array = [NSMutableArray array];

        for (int j=0; j<count; j++) {

            NSString *name = [NSString stringWithFormat:@"人物:%d", j+1];

            [array addObject:name];

        }

        [self.dataList addObject:array];

    }

}



- (void)creatUI

{

    _tableView = [[UITableView alloc] initWithFrame:self.view.frame style:UITableViewStylePlain];

    [self.view addSubview:self.tableView];

    //设置代理

    self.tableView.delegate = self;

    self.tableView.dataSource = self;

    self.automaticallyAdjustsScrollViewInsets = YES;

    self.view.backgroundColor = [UIColor whiteColor];

}



#pragma mark  ---UITableViewDataSource---



- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

    return self.dataList.count;

}



- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

    return [[self.dataList objectAtIndex:section] count];

}



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

{

    static NSString *cellId = @"cell";

    UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:cellId];

    if (!cell) {

        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellId];

    }

    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;

    cell.textLabel.text = [[self.dataList objectAtIndex:indexPath.section] objectAtIndex:indexPath.row];

    return cell;

}



- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section

{

    return [NSString stringWithFormat:@"第%c分区", (char)(section+'A')];

}



//设置分区头标题的高度

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section

{

    return 50;

}



//创建分区标题数组

- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView

{

    NSMutableArray *array = [NSMutableArray array];

    [array addObject:UITableViewIndexSearch];

    for (int i='A'; i<='Z'; i++) {

        NSString *str = [NSString stringWithFormat:@"%c", (char)i];

        [array addObject:str];

    }

    return array;

}



//切换到指定的分区

- (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index

{

    return index-1;

}



- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}



@end