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IOS开发中实现UITableView按照首字母将集合进行检索分组

时间:2015-08-12 编辑:MicLEO 来源:Cnblogs

在开发公司项目中遇到了将图书目录进行按照首字母分组排序的问题

1.在项目添加解析汉字拼音的Pinyin.h文件

/*
 *  pinyin.c
 */
#define HANZI_START 19968
#define HANZI_COUNT 20902
static char firstLetterArray[HANZI_COUNT] = 
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"xy";
char pinyinFirstLetter(unsigned short hanzi)
{
    int index = hanzi - HANZI_START;
    if (index >= 0 && index <= HANZI_COUNT)
    {
        return firstLetterArray[index];
    }
    else
    {
        return '#';
    }
}
View Code

2.自定义处理对象集合的ChineseString.h文件

  

//
//  ChineseString.h
//  Created by leo on 15/8/11.
//  Copyright (c) 2015年 fo. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "PinYin.h"
#import "PictureBook.h"
@interface ChineseString : NSObject
@property(retain,nonatomic) NSString *string;
@property(retain,nonatomic) NSString *pinYin;
@property(nonatomic,strong) PictureBook *book;//图书对象

/**
 *  TableView右方IndexArray
 */
+(NSMutableArray *) IndexArray:(NSArray *) stringArr;

/**
 *  文本列表
 */
+(NSMutableArray *) LetterSortArray:(NSArray *)stringArr;

/**
 *返回一组字母排列数组(中英混排)
 */
+(NSMutableArray *) SortArray:(NSArray *)stringArr;

@end

//
//  ChineseString.m
//
//  Created by leo on 15/8/11.
//  Copyright (c) 2015年 fo. All rights reserved.
//

#import "ChineseString.h"

@implementation ChineseString
@synthesize string;
@synthesize pinYin;
#pragma mark - 返回tableview右方 indexArray
+(NSMutableArray*)IndexArray:(NSArray*)stringArr
{
    NSMutableArray *tempArray = [self ReturnSortChineseArrar:stringArr];
    NSMutableArray *A_Result=[NSMutableArray array];
    NSString *tempString ;
    
    for (NSString* object in tempArray)
    {
        NSString *pinyin = [((ChineseString*)object).pinYin substringToIndex:1];
        //不同
        if(![tempString isEqualToString:pinyin])
        {
            [A_Result addObject:pinyin];
            tempString = pinyin;
        }
    }
    return A_Result;
}

#pragma mark -
+(NSMutableArray*)LetterSortArray:(NSArray*)stringArr
{
    NSMutableArray *tempArray = [self ReturnSortChineseArrar:stringArr];
    NSMutableArray *LetterResult=[NSMutableArray array];
    NSMutableArray *item = [NSMutableArray array];
    NSString *tempString ;
    //拼音分组
    for (NSObject* object in tempArray) {  
        NSString *pinyin = [((ChineseString*)object).pinYin substringToIndex:1];
        PictureBook *book=((ChineseString*)object).book;
        //不同
        if(![tempString isEqualToString:pinyin])
        {
            //分组
            item = [NSMutableArray array];
            [item  addObject:book];
            [LetterResult addObject:item];
            //遍历
            tempString = pinyin;
        }else//相同
        {
            [item  addObject:book];           
        }
    }
    return LetterResult;
}

/**
 * 过滤指定字符串   里面的指定字符根据自己的需要添加
 */
+(NSString*)RemoveSpecialCharacter: (NSString *)str {
    NSRange urgentRange = [str rangeOfCharacterFromSet: [NSCharacterSet characterSetWithCharactersInString: @",.?、 ~¥#&<>《》()[]{}【】^@/£¤|§¨「」『』¢¬ ̄~@#&*()——+|《》$_€"]];
    if (urgentRange.location != NSNotFound)
    {
        return [self RemoveSpecialCharacter:[str stringByReplacingCharactersInRange:urgentRange withString:@""]];
    }
    return str;
}

/**
 *  返回排序好的字符拼音
 *
 */
+(NSMutableArray*)ReturnSortChineseArrar:(NSArray*)stringArr
{
    //获取字符串中文字的拼音首字母并与字符串共同存放
    NSMutableArray *chineseStringsArray=[NSMutableArray array];
    for(int i=0;i<[stringArr count];i++)
    {
        ChineseString *chineseString=[[ChineseString alloc]init];
        PictureBook *book=[stringArr objectAtIndex:i];
        chineseString.book=book;
        chineseString.string=[NSString stringWithString:book.title];
        if(chineseString.string==nil){
            chineseString.string=@"";
        }
        //去除两端空格和回车
        chineseString.string  = [chineseString.string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
        //此方法存在一些问题 有些字符过滤不了
        //NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:@"@/:;()¥「」"、[]{}#%-*+=_\\|~<>$€^•'@#$%^&*()_+'\""];
        //chineseString.string = [chineseString.string stringByTrimmingCharactersInSet:set];

        //这里我自己写了一个递归过滤指定字符串   RemoveSpecialCharacter
        chineseString.string =[ChineseString RemoveSpecialCharacter:chineseString.string];
        // NSLog(@"string====%@",chineseString.string);

        //判断首字符是否为字母
        NSString *regex = @"[A-Za-z]+";
        NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
        NSString *initialStr = [chineseString.string length]?[chineseString.string substringToIndex:1]:@"";
        if ([predicate evaluateWithObject:initialStr])
        {
            NSLog(@"chineseString.string== %@",chineseString.string);
            //首字母大写
            chineseString.pinYin = [chineseString.string capitalizedString] ;
        }else{
            if(![chineseString.string isEqualToString:@""]){
                NSString *pinYinResult=[NSString string];
                for(int j=0;j<chineseString.string.length;j++){
                    NSString *singlePinyinLetter=[[NSString stringWithFormat:@"%c",
                                                   pinyinFirstLetter([chineseString.string characterAtIndex:j])]uppercaseString];
                    pinYinResult=[pinYinResult stringByAppendingString:singlePinyinLetter];
                }
                chineseString.pinYin=pinYinResult;
            }else{
                chineseString.pinYin=@"";
            }
        }
        [chineseStringsArray addObject:chineseString];
    }
    //按照拼音首字母对这些Strings进行排序
    NSArray *sortDescriptors = [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"pinYin" ascending:YES]];
    [chineseStringsArray sortUsingDescriptors:sortDescriptors];
    return chineseStringsArray;
    
}

#pragma mark - 返回一组字母排序数组
+(NSMutableArray*)SortArray:(NSArray*)stringArr
{
    NSMutableArray *tempArray = [self ReturnSortChineseArrar:stringArr];
    
    //把排序好的内容从ChineseString类中提取出来
    NSMutableArray *result=[NSMutableArray array];
    for(int i=0;i<[stringArr count];i++){
        [result addObject:((ChineseString*)[tempArray objectAtIndex:i]).string];
    }
    return result;
}
@end
View Code

3.处理服务器返回的数据

  

//定义数据
@property(nonatomic,strong)NSMutableArray *indexArray;//去重后的首字母
@property(nonatomic,strong)NSMutableArray *letterResultArr;//按照首字母排序后的集合


if (ret) {
            self.indexArray = [ChineseString IndexArray:ret];
            self.letterResultArr = [ChineseString LetterSortArray:ret];
            [self.tableView  reloadData];
        }

4.实现UITabView的一些必要的代理方法

#pragma mark -Table View Data Source Methods
#pragma mark -设置右方表格的索引数组
-(NSArray *) sectionIndexTitlesForTableView:(UITableView *)tableView{
    return self.indexArray;
}

-(NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index{
    return index;
}

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

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [[self.LetterResultArr objectAtIndex:section]count];
}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    return 80;
}


-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    PictureBook *book=[[self.LetterResultArr objectAtIndex:indexPath.section]objectAtIndex:indexPath.row];
    BookDetailViewController *vc = [[BookDetailViewController alloc]init];
    vc.title=book.title;
    vc.book=book;
    [self.navigationController pushViewController:vc animated:YES];
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    BookItemViewCell *cell = [BookItemViewCell cellWithTableView:tableView];
    cell.book=[[self.LetterResultArr objectAtIndex:indexPath.section]objectAtIndex:indexPath.row];
    cell.delegate=self;
    return cell;
}
关键词:IOS Table