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http://blog.csdn.net/testcs_dn/article/details/
实现效果：
此例中输入的中文字符串“万万保重”，有三个字是多音字，所以alert对话框中显示的是多种读音的组合；
如何实现？
如何实现通过拼音首字母快速查找页面内的中文内容呢？
过程原理是这样的：例如要对一些人名进行快速查找，当页面加载完成后，对所有人名建立一个索引，生成拼音首字母与姓名的对应关系；然后监听键盘事件，当用户按下键盘时，根据键值得到按下的是哪个字母，然后遍历索引中是否存在相同的拼音首字母；
这里还实现了根据字母组合来查找的功能，原理是这样的：当用户按键时，我们记录下按键的时间，如果两个连续的按键间隔小于一秒，就认为是组合查询，把当前按键值加在之前的按键值之后，不多说了，上代码！
获取拼音首字母：
[javascript]&
建立索引代码：
[javascript]&
执行查找代码：
[javascript]&
高亮显示代码：
[javascript]&
高亮样式：
源码下载：
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(2)(1)(1)(2)(2)(2)(1)(3)(2)(1)(1)(5)(2)(1)(7)(6)(5)(1)(4)(5)(17)(12)(14)(5)(11)(2)(1)(1)(3)(25)首先,这个功能是根据大写首字母来分组的，这就来了，汉字是不好分组的，只能使用拼音，那么怎么将汉字转换成拼音呢？下面就有一个方法
//初始化代码
& &&NSString * str =@&中华人民共和国万岁&;
&& NSString * PYStr& = [selftransform:str];
NSLog(@&拼音%@&,PYStr);
&//汉字转拼音所封装的方法
-(NSString *)transform:(NSString
NSMutableString *pinyin = [str&mutableCopy];
CFStringTransform((__bridgeCFMutableStringRef)pinyin,NULL,kCFStringTransformMandarinLatin,NO);
CFStringTransform((__bridgeCFMutableStringRef)pinyin,NULL,kCFStringTransformStripCombiningMarks,NO);
NSLog(@&%@&, pinyin);
return [pinyinuppercaseString];
#pragma mark - 拼音
MTTUtil类里面的方法,如下
+(char)pinyinFirstLetter:(unsignedshort)hanzi{
index = hanzi -HANZI_START;//宏定义
(index &=0 && index &=HANZI_COUNT)//宏定义
& & & &returnfirstLetterArray[index];
& & & &return'#';
+(char)getFirstChar:(constNSString
& &if (nil
== str ||0 == [strlength]) {
& & & &return'#';
& &constchar
* firstChar = [strUTF8String];
& &if ( ('a'&=&
*firstChar && *firstChar &='z')
& & & & || ('A' &= *firstChar && *firstChar &='Z'))
& & & &return *firstC
& & & &return [MTTUtilpinyinFirstLetter:[strcharacterAtIndex:0]];
//这是我定义了一个头文件的内容
#define HANZI_START19968
#define HANZI_COUNT20902
staticchar firstLetterArray[HANZI_COUNT]
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现在已经可以将字符串转换成拼音，那么现在可能有的朋友已经有思路了
先理理思路啊，我们是根据字符串的大写首字母来判断的，那么首先我要知道我的所有好友里面有多少个字符串，他们总共占有了多少个字母，我会先把这些字母根据汉语拼音的顺序进行排列，使用容器储存起来，为了方便判断有多少个区，就是数组吧，因为数组是有序的，方便我进行排序
& &&//得到所有好友的首字母，苹果给我们提供了一个关于数组排序的方法，
& & self.allIndexes =[NSMutableArrayarrayWithArray:[[self.itemsallKeys]sortedArrayUsingComparator:^NSComparisonResult(id
obj1,id obj2){
//然后就是调用比较字母的顺序
& & & &&char char1=[MTTUtilgetFirstChar:obj1];
& & & & char char2=[MTTUtilgetFirstChar:obj2];
& & & & NSString *f1=[NSStringstringWithFormat:@&%c&,char1];
& & & & NSString *f2=[NSStringstringWithFormat:@&%c&,char2];
& & & & return [f1compare: f2];
& & & &&return [f1compare: f2];
那么self.items是什么,self.items是个字典，key值是我的好友的大写字母，value是大写字母中对应的好友，实现代码，使用字典的话就方便self.
allIndexes来找到对应的数组了
根据如下：
-(NSMutableDictionary *)sortByContactPy&
[[DDUserModule&shareInstance]&getAllFriends]];得到我的所有好友，是个数组
& & return [ContactsModulesortContractsByPY:[[DDUserModuleshareInstance]getAllFriends]];
+(NSMutableDictionary *)sortContractsByPY:(NSArray
& & NSMutableDictionary *dic = [NSMutableDictionarynew];
MTTUserEntity是我的封装的好友的model
& & for (MTTUserEntity * userin
//[user&getUserShowName]得到好友的名字
if ([usergetUserShowName]) {
& & & & & & fl = [[[usergetUserShowName]substringWithRange:NSMakeRange(0,1)]uppercaseString];
& & & & & &
//转成了可变字符串
& & & & & &
NSMutableString *str = [NSMutableStringstringWithString:fl];
& & & & & &
//先转换为带声调的拼音
& & & & & &
CFStringTransform((CFMutableStringRef)str,NULL,kCFStringTransformMandarinLatin,NO);
& & & & & &
//再转换为不带声调的拼音
& & & & & &
CFStringTransform((CFMutableStringRef)str,NULL,kCFStringTransformStripDiacritics,NO);
& & & & & &
//转化为大写拼音
& & & & & &
NSString *pinYin = [strcapitalizedString];
&& & & & & &
& & & & & & fl = [pinYinsubstringToIndex:1];
unichar keyChar=[flcharacterAtIndex:0];
if(keyChar &'A' || keyChar &'Z'){
& & & & & & fl=@&#&;
if ([dicsafeObjectForKey:fl]) {
& & & & & &
NSMutableArray *arr = [dicsafeObjectForKey:fl];
& & & & & & [arraddObject:user];
& & & & }else{
& & & & & &
NSMutableArray *arr = [[NSMutableArrayalloc]initWithArray:@[user]];
& & & & & & [dicsetObject:arrforKey:fl];
enumerateKeysAndObjectsUsingBlock:^(id key,id
obj,BOOL *stop) {
NSArray *preData =
NSMutableArray *tmp = [[NSMutableArrayalloc]initWithArray:preData];
NSArray *sortDescriptors = [NSArrayarrayWithObject:[NSSortDescriptorsortDescriptorWithKey:@&pyname&ascending:YES]];
& & & & [tmp
sortUsingDescriptors:sortDescriptors];
& & & & [dic
safeSetObject:tmpforKey:key];
//这样以来我的多少个区头，每个区有多少个好友，区头的顺序排列都有了，现在就可以使用UI 显示了
//总共有多少区
- (NSInteger)numberOfSectionsInTableView:(UITableView
*)tableView
return [self.allIndexescount]+1;
//每个区有多少行
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
& & & & & & NSString *keyStr = [selfallIndexes][(NSUInteger)
(section -1)];
& & & & & & NSArray *arr = (self.items)[keyStr];
& & & & & & return [arrcount];
//显示首字母对应的区头
- (UIView*)tableView:(UITableView
*)tableView viewForHeaderInSection:(NSInteger)section
& & & & & &&text = [self.allIndexes[section
- 1]uppercaseString];
//将text显示在UI上
& &&UIView *sectionHeadView = [[UIViewalloc]initWithFrame:CGRectMake(0,0,SCREEN_WIDTH,22)];
& & [sectionHeadView setBackgroundColor:RGB(240,240,245)];
& & UILabel *sectionHeaderLabel = [[UILabelalloc]initWithFrame:CGRectMake(10,4.5,SCREEN_WIDTH,13)];
& & [sectionHeaderLabel setText:text];
& & [sectionHeaderLabel setTextColor:RGB(144,144,148)];
& & [sectionHeaderLabel setFont:systemFont(13)];
& & [sectionHeadView addSubview:sectionHeaderLabel];
& & return sectionHeadV
//显示cell上的好友信息
- (UITableViewCell *)tableView:(UITableView
*)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
//得到对应的key值
& & & & & &&NSString *keyStr = [[selfallIndexes]objectAtIndex:indexPath.section-1];
& & & & & &
NSLog(@&关键字符串%@&,keyStr);
//根据key值取出数组
& & & & & &
NSArray *userArray =[self.itemsobjectForKey:keyStr];
//根据对应的行取出对象model
& & & & & &
MTTUserEntity *user = [userArrayobjectAtIndex:indexPath.row];
& & & & & & [cellsetCellContent:[usergetAvatarUrl]Name:[usergetUserShowName]Placeholder:[usergetPlaceholderImage]];
//在搜索好友的情况下，使用了searchBar,searchBarDelegate,后续的代码相对简单许多
- (BOOL)searchBarShouldBeginEditing:(UISearchBar
*)searchBar
& & [selfhiddenNofriend:YES];
& & [_searchBarsetShowsCancelButton:YESanimated:YES];
& & [self.searchPlaceholderViewsetHidden:NO];
- (void)searchBarCancelButtonClicked:(UISearchBar
*)searchBar{
& & [selfendSearch];
-(void)searchBarTextDidBeginEditing:(UISearchBar
*)searchBar {
for (id objin [searchBarsubviews])
for (id ccin [objsubviews])
& & & & & &
isKindOfClass:[UIButtonclass]])
& & & & & & & &UIButton *btn = (UIButton
& & & & & & & & [btnsetTintColor:TTBLUE];
& & & & & & }
- (void)searchBar:(UISearchBar
*)searchBar textDidChange:(NSString *)searchText
if(searchText.length){
& & & & [self.searchPlaceholderViewsetHidden:YES];
& & & & [self.searchTableViewsetHidden:NO];
& & & & [self.searchdicremoveAllObjects];
& & & & [self.searchKeyArrayremoveAllObjects];
& & & & [self.searchTableViewreloadData];
NSMutableArray *searchResultArray=[[NSMutableArrayalloc]init];
NSArray *users=[[DDUserModuleshareInstance]getAllFriends];
for(MTTUserEntity *friendin
&& & & & & &
& & & & & &
NSString *searchInfo=[friend&getUserSearchInfo];
& & & & & &
DDLog(@&%@===&,searchInfo);
//判断输入文本字符串中的字节是否含有好友的名字的字节
& & & & & &
if([searchInfo&rangeOfString:searchText].location
!=NSNotFound)//_roaldSearchText
& & & & & & {
&& & & & & & &//[self.searchdic setValue:friend forKey:friend.objID];
& & & & & & & & [searchResultArrayaddObject:friend];
& & & & & & }
& & & & & &
& & & & & & {
& & & & & & & &DDLog(@&no&);
& & & & & & }
if(searchResultArray.count&0)
//如果含有的话，同上直接显示她的在搜索的tableview上
&& & & & &
self.searchdic=[ContactsModulesortContractsByPY:searchResultArray];
&& & & & &
self.searchKeyArray =[NSMutableArrayarrayWithArray:[[self.searchdicallKeys]sortedArrayUsingComparator:^NSComparisonResult(id
obj1,id obj2){
&& & & & & & &char char1=[MTTUtilgetFirstChar:obj1];
&& & & & & & &char char2=[MTTUtilgetFirstChar:obj2];
&& & & & & & &NSString *f1=[NSStringstringWithFormat:@&%c&,char1];
&& & & & & & &NSString *f2=[NSStringstringWithFormat:@&%c&,char2];
&& & & & & & &return [f1compare:
&& & & & & }] ];
& & & & & &
&& & & & &
NSLog(@&%@&,_searchKeyArray);
&& & & & &
if([self.searchKeyArraycount]&0)
&& & & & & {
&& & & & & & &if([self.searchKeyArray[0]characterAtIndex:0]=='#')
&& & & & & & & {
&& & & & & & & & &id fkey= [self.searchKeyArrayobjectAtIndex:0];
&& & & & & & & & & [self.searchKeyArrayremoveObjectAtIndex:0];
&& & & & & & & & & [self.searchKeyArrayaddObject:fkey];
&& & & & & & & }
& & & & & & & &
&& & & & & & & [_searchNoFriengViewsetHidden:YES];
&& & & & & }
&& & & & & [self.searchTableViewreloadData];
& & & & & &
//search -- no result
//& & & & & & [self.view addSubview: _searchNoFriengView];
& & & & & & [_searchNoFriengViewsetHidden:NO];
& & }else{
& & & & [self.searchPlaceholderViewsetHidden:NO];
& & & & [self.searchTableViewsetHidden:YES];
& & & & [self.searchTableViewreloadData];
- (void)endSearch{
// 原tableview允许滚动
self.tableView.scrollEnabled
self.searchBar.text
& & [self.searchPlaceholderViewsetHidden:YES];
& & [self.searchTableViewsetHidden:YES];
// 显示tabbar
self.tabBarController.tabBar.hidden
& & [self.searchBarresignFirstResponder];
& & [self.searchBarsetShowsCancelButton:NOanimated:YES];
if([self.itemscount]&0){
& & & & [selfhiddenNofriend:YES];
& & & & [selfhiddenNofriend:NO];
& & [self.searchNoFriengViewsetHidden:YES];
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