实现按照字母分类分组排序

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这里写图片描述
为了实现上图字母分类排序
实现过程借鉴了网上大神的博客笔记
http://www.cnblogs.com/fxiaoquan/p/4724208.html
实现过程如下：
下载 pinyin.c 和 pinyin.h 文件导入到项目中

这里创建一个处理对象的数据模型

将大神的代码copy到模型中替换成自己想要的数据模型

////  ChineseString.h//  SAGA_iOS////  Created by  location on 16/8/10.//  Copyright © 2016年 it.sozi. All rights reserved.//#import <Foundation/Foundation.h>#import "PinYin.h"#import "CZHomeSearchBrandItem.h"@interface ChineseString : NSObject@property(nonatomic,copy) NSString *string;@property(nonatomic,copy) NSString *pinYin;@property(nonatomic,strong)CZHomeSearchBrandItem *brandItem;/** *  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;

实现文件

////  ChineseString.m//  SAGA_iOS////  Created by  location on 16/8/10.//  Copyright © 2016年 it.sozi. All rights reserved.//#import "ChineseString.h"@implementation ChineseString- ( id )init {    if ( self = [ super init ]) {    }    return self ;}#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];        CZHomeSearchBrandItem *brandItem=((ChineseString*)object).brandItem;        //不同        if(![tempString isEqualToString:pinyin])        {            //分组            item = [NSMutableArray array];            [item  addObject:brandItem];            [LetterResult addObject:item];            //遍历            tempString = pinyin;        }else//相同        {            [item  addObject:brandItem];        }    }    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: @",.？、 ~￥#&<>《》()[]{}【】^@/￡¤|§¨「」『』￠￢￣~@#&*（）——+|《》$_€"]];    if (urgentRange.location != NSNotFound)    {        return [self RemoveSpecialCharacter:[str stringByReplacingCharactersInRange:urgentRange withString:@""]];    }    return str;}/** *  返回排序好的字符拼音 * */+(NSMutableArray*)ReturnSortChineseArrar:(NSArray*)stringArr{    //获取字符串中文字的拼音首字母并与字符串共同存放    NSMutableArray *chineseStringsArray=[NSMutableArray array];    for(int i=0;i<[stringArr count];i++)    {        ChineseString *chineseString=[[ChineseString alloc]init];        CZHomeSearchBrandItem *brandItem=[stringArr objectAtIndex:i];        chineseString.brandItem=brandItem;        chineseString.string=[NSString stringWithString:brandItem.name];        if(chineseString.string==nil){            chineseString.string=@"";        }        //去除两端空格和回车        chineseString.string  = [chineseString.string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];        //此方法存在一些问题 有些字符过滤不了        //NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:@"@／：；（）¥「」＂、[]{}#%-*+=_\\|~＜＞$€^•'@#$%^&*()_+'\""];        //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;}

在获取数据的控制器页面导入#import “ChineseString.h”
@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
初始化两个数组来接收排序后的数据
实现相应的类方法

-(void)setWatchBrands:(NSArray *)watchBrands{    _watchBrands = watchBrands;    if (watchBrands) {        //返回tableview右方 indexArray        self.indexArray = [ChineseString IndexArray:watchBrands];        self.letterResultArr = [ChineseString LetterSortArray:watchBrands];    }    [self.tableView reloadData];}

以上就已经将后台返回的数据进行字母编排编排后赋值给相应的数组 tableView 实现对应的数据源和代理方法

//多少组- (NSInteger)numberOfSectionsInTableView:( UITableView *)tableView{    return self.indexArray.count;}//每组中有多少行- (NSInteger)tableView:( UITableView *)tableView numberOfRowsInSection:( NSInteger )section{    return [[self.letterResultArr objectAtIndex:section]count];}// 为 section 添加标题- (NSString *)tableView:( UITableView *)tableView titleForHeaderInSection:( NSInteger )section{    return [self.indexArray objectAtIndex :section];}//tableView 右边显示的字母- (NSArray *)sectionIndexTitlesForTableView:( UITableView *)tableView{    return self.indexArray;}#pragma mark - Table view data source- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {    static NSString *brandID =@"brandID";    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:brandID];    if (cell == nil) {        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:brandID];    }    CZHomeSearchBrandItem *brandItem = [[self.letterResultArr objectAtIndex:indexPath.section]objectAtIndex:indexPath.row];    cell.textLabel.text = brandItem.name;    cell.textLabel.font = CZFontMiddle;    cell.textLabel.textColor = CZColor(@"#333333");    return cell;}

展示效果如上图
非常感谢大神的代码让我实现了字母分类分组排序
详细实现可参照此链接 http://www.cnblogs.com/fxiaoquan/p/4724208.html

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