OC -类似于通讯录的功能

一.建立person类包含name pinyin参数

#import "Person.h"

@property (nonatomic,copy)NSString *name;

@property (nonatomic,copy)NSString *pinYin;

二.实现类

#import "Person.h"

#define WIDTH [UIScreen mainScreen].bounds.size.width

#define HEIGHT [UIScreen mainScreen].bounds.size.height

<UITableViewDelegate,UITableViewDataSource>

{

    NSMutableArray *dataSource;

    UITableView *myTableView;

    NSMutableArray *titleAray;

}

- (void)viewDidLoad {

    [super viewDidLoad];

    self.title = @"UITableView";

    self.view.backgroundColor = [UIColor lightGrayColor];

    dataSource = [NSMutableArray array];

    NSArray *arr = [[NSArray alloc] initWithObjects:@"王达",@"李明",@"李松",@"朱子夫",@"秦始皇",@"刘彻",@"李世民",@"周树人",@"李松达",@"邓紫棋",@"安美",@"安菲",@"崔杰",@"冰冰",@"啊Q", nil];

    

    NSMutableArray *modelArray = [NSMutableArray array];

    for (int i = 0; i< arr.count; i++) {

        NSMutableString *mutableString = [NSMutableString stringWithString:arr[i]];

        CFStringTransform((CFMutableStringRef)mutableString, NULL, kCFStringTransformToLatin, false);

        CFStringTransform((CFMutableStringRef)mutableString, NULL, kCFStringTransformStripDiacritics, false);

        

        Person *model = [[Person alloc] init];

        model.name = arr[i];

        model.pinYin = mutableString;

        [modelArray addObject:model];

    }

    //NSSortDescriptor 指定用于对象数组排序的对象的属性

    NSArray *sortDescriptors = [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"pinYin" ascending:YES]];

    

//对person进行排序

    [modelArray sortUsingDescriptors:sortDescriptors];  

    titleAray = [NSMutableArray array];

    //删除多余的字符

    for (int i = 0; i < modelArray.count; i++) {

        Person *model = modelArray[i];

        NSString *str = [model.pinYin substringToIndex:1];

        if (![titleAray containsObject:str]) {

            [titleAray addObject:str];

        }

    }

    //将中文数据进行二维的数组的拆分

    for (int i = 0; i< titleAray.count; i++) {

        NSString *str = titleAray[i];

        NSMutableArray *sortArray = [NSMutableArray array];

        for (Person *model in modelArray) {

            if ([model.pinYin hasPrefix:str]) {

                [sortArray addObject:model.name];

            }

        }

        [dataSource addObject:sortArray];

    }

    [self creatTableView];

}

#pragma mark - UITableViewDelegate

-(void)creatTableView{

    myTableView = [[UITableView alloc] initWithFrame:self.view.frame];

    myTableView.delegate = self;

    myTableView.dataSource = self;

    //设置右侧索引的背景色

    myTableView.sectionIndexBackgroundColor = [UIColor clearColor];

    [self.view addSubview:myTableView];

}

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

    return [dataSource[section] count];

}

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{

    return dataSource.count;

}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{

    return 55;

}

-(CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section{

    return 1;

}

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

    return 20;

}

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

    NSMutableArray *toBeReturned = [[NSMutableArray alloc]init];

    for(char c = 'A';c<='Z';c++)

        [toBeReturned addObject:[NSString stringWithFormat:@"%c",c]];

    return toBeReturned;

}

#pragma mark - UITableViewDataSource

-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{

    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, WIDTH, 20)];

    view.backgroundColor = [UIColor grayColor];

    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20, 0, 60, 20)];

    NSString *str = titleAray[section];

    //转化为大写

    str = [str uppercaseString];

    label.text = str;

    [view addSubview:label];

    return view;

}

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

    static NSString *identifier = @"cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];

    if (!cell) {

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

    }

    cell.textLabel.text = dataSource[indexPath.section][indexPath.row];

    return cell;

}