iOS--通讯录（UITableViewController）

#import <UIKit/UIKit.h>

@interface RootTableViewController : UITableViewController
@property(strong,nonatomic) NSDictionary *dic;
@property(strong,nonatomic) NSArray *arrkeys;
@end

#import "RootTableViewController.h"

@interface RootTableViewController ()

@end

@implementation RootTableViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    NSString *path=[[NSBundle mainBundle] pathForResource:@"sortednames" ofType:@"plist"];
    self.dic=[NSDictionary dictionaryWithContentsOfFile:path];
//    NSLog(@"%@",self.dic);
//    NSLog(@"%@",self.dic.allKeys);
    
    // 字典排序  字典的输出是无序的， 需要排序
    self.arrkeys=[self.dic.allKeys sortedArrayUsingSelector:@selector(compare:)];
//    NSLog(@"%@",self.arrkeys);
    // 唯一标识符
    [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"reuseIdentifier"];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - 每个组的数量

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return self.arrkeys.count;
}

#pragma mark - 组数列表
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    NSString *key=self.arrkeys[section];
    NSArray *tempArr=self.dic[key];
//    NSLog(@"%@",key);
    return tempArr.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"reuseIdentifier" forIndexPath:indexPath];
    
    NSString *key=self.arrkeys[indexPath.section];
    NSArray *tempArr=self.dic[key];
    NSString *name=tempArr[indexPath.row];
    
    cell.textLabel.text=name;
    
    return cell;
}

#pragma  mark - 返回行高的方法
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 50;
}

#pragma mark - 系统默认的开头关键字
-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    return self.arrkeys[section];
    
//    return [NSString stringWithFormat:@"%c",(char)(‘A‘+section)];
    
}

#pragma mark - 自定义自体大小的开头关键字
-(UIView *) tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
    UILabel *lbl=[[UILabel alloc] init];
    
    lbl.backgroundColor=[UIColor redColor];
    lbl.tintColor=[UIColor yellowColor];
    lbl.text=self.arrkeys[section];
    lbl.font=[UIFont systemFontOfSize:30.0];
    return lbl;
}
#pragma mark - 设置右边索引高度
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section{
    
    return 50;
}

#pragma mark - 设置所有分区的标题的列表
-(NSArray<NSString *> *)sectionIndexTitlesForTableView:(UITableView *)tableView
{
    return self.arrkeys;
}

#pragma mark -  单选控制格式
-(UITableViewCellAccessoryType)tableView:(UITableView *)tableView accessoryTypeForRowWithIndexPath:(NSIndexPath *)indexPath
{
    if (indexPath.row==0) {
        return UITableViewCellAccessoryCheckmark;
    }
    else if(indexPath.row==1){
        return UITableViewCellAccessoryDetailDisclosureButton;
    }
    else if(indexPath.row==2){
        return UITableViewCellAccessoryDisclosureIndicator;
    }else{
        return UITableViewCellAccessoryNone;
    }
}

.........
@end

#import <UIKit/UIKit.h>
#import "RootTableViewController.h"
@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

@end

#import "AppDelegate.h"

@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window.rootViewController=[[UINavigationController alloc] initWithRootViewController:[[RootTableViewController alloc] initWithStyle:UITableViewStyleGrouped]];
    
    return YES;
}
.......

@end