iOS.UIKit.15.UITableView -- Index

1、案例介绍：具备索引功能的分节表视图，如图01

图01

2、team_dictionary.plist

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<plist version="1.0">

<dict>

    <key>A组</key>

    <array>

        <string>A1-南非</string>

        <string>A2-墨西哥</string>

        <string>A3-乌拉圭</string>

        <string>A4-法国</string>

    </array>

    <key>B组</key>

    <array>

        <string>B1-阿根廷</string>

        <string>B2-尼日利亚</string>

        <string>B3-韩国</string>

        <string>B4-希腊</string>

    </array>

    <key>C组</key>

    <array>

        <string>C1-英格兰</string>

        <string>C2-美国</string>

        <string>C3-阿尔及利亚</string>

        <string>C4-斯洛文尼亚</string>

    </array>

    <key>D组</key>

    <array>

        <string>D1-德国</string>

        <string>D2-澳大利亚</string>

        <string>D3-塞尔维亚</string>

        <string>D4-加纳</string>

    </array>

    <key>E组</key>

    <array>

        <string>E1-荷兰</string>

        <string>E2-丹麦</string>

        <string>E3-日本</string>

        <string>E4-喀麦隆</string>

    </array>

    <key>F组</key>

    <array>

        <string>F1-意大利</string>

        <string>F2-巴拉圭</string>

        <string>F3-斯洛伐克</string>

        <string>F4-新西兰</string>

    </array>

    <key>G组</key>

    <array>

        <string>G1-巴西</string>

        <string>G2-朝鲜</string>

        <string>G3-科特迪瓦</string>

        <string>G4-葡萄牙</string>

    </array>

    <key>H组</key>

    <array>

        <string>H1-西班牙</string>

        <string>H2-瑞士</string>

        <string>H3-洪都拉斯</string>

        <string>H4-智利</string>

    </array>

</dict>

</plist>

3、.h

#import <UIKit/UIKit.h>

@interface CQ24ViewController : UITableViewController<UISearchBarDelegate>

// 表数据

@property (strong,nonatomic) NSDictionary *dictData;

// 表数据分组名集合

@property (strong,nonatomic) NSArray *listGroupname;
@end

4、.m

#import "CQ24ViewController.h"

@interface CQ24ViewController ()
@end
@implementation CQ24ViewController
- (void)viewDidLoad

{

    [super viewDidLoad];
NSBundle *mainBundle = [NSBundle mainBundle];

    NSString *plistPath = [mainBundle pathForResource:@"team_dictionary" ofType:@"plist"];
// 1、初始化表格数据dictData

    self.dictData = [[NSDictionary alloc] initWithContentsOfFile:plistPath];

    // 2、初始化分组名称,排序

    NSArray *tempList = [self.dictData allKeys];

    self.listGroupname = [tempList sortedArrayUsingSelector:@selector(compare:)];
}
- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

}
#pragma mark 返回分组数

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

{

    // 1、获取分组名称

    NSString *groupName = [self.listGroupname objectAtIndex:section];

    // 2、将分组名称作为key，从字典中取出分组数据

    NSArray *listTeams = [self.dictData objectForKey:groupName];

    return [listTeams count];
}

#pragma mark 填充每个节的Cell

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

{

    // 1、加载一个cell

    static NSString *CellIdentifier = @"CellIdentifier";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil) {

        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];

    }

    // 2、获取选择的节

    NSUInteger section = [indexPath section];

    // 3、获取节名称

    NSString *groupName = [self.listGroupname objectAtIndex:section];

    // 4、获取节数据

    NSArray *listTeams = [self.dictData objectForKey:groupName];

    // 5、获取选中节中的行索引

    NSUInteger row = [indexPath row];

    // 6、设置cell中的text

    cell.textLabel.text = [listTeams objectAtIndex:row];

    return cell;

}

#pragma mark 节数

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

    return self.listGroupname.count;

}

#pragma mark 设置节title

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

{

    NSString *groupName = [self.listGroupname objectAtIndex:section];

    return groupName;

}

#pragma mark 索引

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

{

    // 1、存在索引的集合

    NSMutableArray *listTitles = [[NSMutableArray alloc] initWithCapacity:[self.listGroupname count]];

    // 2、初始化索引集合

    for (NSString *item in self.listGroupname) {

        NSString *title = [item substringToIndex:1];

        [listTitles addObject:title];

    }

    return listTitles;

}
@end

iOS.UIKit.15.UITableView -- Index