爲了實現上圖字母分類排序
實現過程借鑑了網上 大神的博客筆記
http://www.cnblogs.com/fxiaoquan/p/4724208.html
實現過程如下:
下載 pinyin.c 和 pinyin.h 文件 導入到項目中
這裏創建一個處理對象的數據模型
將大神的代碼copy到模型中 替換成自己想要的數據模型
//
// 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;
/**
*返回一組字母排列數組(中英混排)
*/
+(NSMutableArray *) SortArray:(NSArray *)stringArr;
實現文件
//
// 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;
//拼音分組
for (NSObject* object in tempArray) {
NSString *pinyin = [((ChineseString*)object).pinYin substringToIndex:1];
CZHomeSearchBrandItem *brandItem=((ChineseString*)object).brandItem;
//不同
if(![tempString isEqualToString:pinyin])
{
//分組
item = [NSMutableArray array];
[item addObject:brandItem];
[LetterResult addObject:item];
//遍歷
tempString = pinyin;
}else//相同
{
[item addObject:brandItem];
}
}
return LetterResult;
}
/**
* 過濾指定字符串 裏面的指定字符根據自己的需要添加
*/
+(NSString*)RemoveSpecialCharacter: (NSString *)str {
NSRange urgentRange = [str rangeOfCharacterFromSet: [NSCharacterSet characterSetWithCharactersInString: @",.?、 ~¥#&<>《》()[]{}【】^@/£¤|§¨「」『』¢¬ ̄~@#&*()——+|《》$_€"]];
if (urgentRange.location != NSNotFound)
{
return [self RemoveSpecialCharacter:[str stringByReplacingCharactersInRange:urgentRange withString:@""]];
}
return str;
}
/**
* 返回排序好的字符拼音
*
*/
+(NSMutableArray*)ReturnSortChineseArrar:(NSArray*)stringArr
{
//獲取字符串中文字的拼音首字母並與字符串共同存放
NSMutableArray *chineseStringsArray=[NSMutableArray array];
for(int i=0;i<[stringArr count];i++)
{
ChineseString *chineseString=[[ChineseString alloc]init];
CZHomeSearchBrandItem *brandItem=[stringArr objectAtIndex:i];
chineseString.brandItem=brandItem;
chineseString.string=[NSString stringWithString:brandItem.name];
if(chineseString.string==nil){
chineseString.string=@"";
}
//去除兩端空格和回車
chineseString.string = [chineseString.string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
//此方法存在一些問題 有些字符過濾不了
//NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:@"@/:;()¥「」"、[]{}#%-*+=_\\|~<>$€^•'@#$%^&*()_+'\""];
//chineseString.string = [chineseString.string stringByTrimmingCharactersInSet:set];
//這裏我自己寫了一個遞歸過濾指定字符串 RemoveSpecialCharacter
chineseString.string =[ChineseString RemoveSpecialCharacter:chineseString.string];
// NSLog(@"string====%@",chineseString.string);
//判斷首字符是否爲字母
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);
//首字母大寫
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];
}
//按照拼音首字母對這些Strings進行排序
NSArray *sortDescriptors = [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"pinYin" ascending:YES]];
[chineseStringsArray sortUsingDescriptors:sortDescriptors];
return chineseStringsArray;
}
#pragma mark - 返回一組字母排序數組
+(NSMutableArray*)SortArray:(NSArray*)stringArr
{
NSMutableArray *tempArray = [self ReturnSortChineseArrar:stringArr];
//把排序好的內容從ChineseString類中提取出來
NSMutableArray *result=[NSMutableArray array];
for(int i=0;i<[stringArr count];i++){
[result addObject:((ChineseString*)[tempArray objectAtIndex:i]).string];
}
return result;
}
在獲取數據的控制器頁面導入#import “ChineseString.h”
@property(nonatomic,strong)NSMutableArray *indexArray;//去重後的首字母
@property(nonatomic,strong)NSMutableArray *letterResultArr;//按照首字母排序後的集合
初始化兩個數組來接收排序後的數據
實現相應的類方法
-(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];
}
以上就已經將後臺返回的數據 進行字母編排 編排後賦值給相應的數組 tableView 實現對應的數據源 和代理方法
//多少組
- (NSInteger)numberOfSectionsInTableView:( UITableView *)tableView
{
return self.indexArray.count;
}
//每組中有多少行
- (NSInteger)tableView:( UITableView *)tableView numberOfRowsInSection:( NSInteger )section
{
return [[self.letterResultArr objectAtIndex:section]count];
}
// 爲 section 添加標題
- (NSString *)tableView:( UITableView *)tableView titleForHeaderInSection:( NSInteger )section
{
return [self.indexArray objectAtIndex :section];
}
//tableView 右邊顯示的字母
- (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;
}
展示效果如上圖
非常感謝大神的代碼 讓我實現了字母分類分組排序
詳細實現可參照 此鏈接 http://www.cnblogs.com/fxiaoquan/p/4724208.html