类似微信通讯录界面的排序方法及中文转拼音的方法

最近做一个类似微信的通讯录列表，因为本人也算个新手，然后呢，就遇到点问题。难点在对昵称的排序上，顺带着也就找了找中文转拼音的方法。

废话不多说，直接贴代码吧

1、首先要对昵称字符串进行中文转拼音,这个比较简单，写到NSString分类里面就行。

- (NSString *)pinyin;
{
NSMutableString *str = [self mutableCopy];
CFStringTransform(( CFMutableStringRef)str, NULL, kCFStringTransformMandarinLatin, NO);
CFStringTransform((CFMutableStringRef)str, NULL, kCFStringTransformStripDiacritics, NO);

　　
return [str stringByReplacingOccurrencesOfString:@" " withString:@""];//顺带去除字符串前面的空格
　　
}

2、对昵称字符串数组进行分组，按a--z--#的顺序，相同首字母的保存在同一个数组中。

+ (NSMutableArray *) getNameCellArrayBy:(NSMutableArray *)array{
NSMutableArray *ans = [[NSMutableArray alloc] init];

NSArray *serializeArray = [(NSArray *)array sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {//排序
int i;
NSString *strA = ((NSString *)obj1).pinyin;
NSString *strB = ((NSString *)obj2).pinyin;
for (i = 0; i < strA.length && i < strB.length; i ++) {
char a = [strA characterAtIndex:i];
char b = [strB characterAtIndex:i];
if (a > b) {
return (NSComparisonResult)NSOrderedDescending;//上升
}
else if (a < b) {
return (NSComparisonResult)NSOrderedAscending;//下降
}
}

if (strA.length > strB.length) {
return (NSComparisonResult)NSOrderedDescending;
}else if (strA.length < strB.length){
return (NSComparisonResult)NSOrderedAscending;
}else{
return (NSComparisonResult)NSOrderedSame;
}
}];

char lastC = '1';
NSMutableArray *data;
NSMutableArray *oth = [[NSMutableArray alloc] init];
for (NSString *user in serializeArray) {
char c = [user.pinyin characterAtIndex:0];
if (!isalpha(c)) {
[oth addObject:user];
}
else if (c != lastC){
lastC = c;
if (data && data.count > 0) {
[ans addObject:data];
}

data = [[NSMutableArray alloc] init];
[data addObject:user];
}
else {
[data addObject:user];
}
}
if (data && data.count > 0) {
[ans addObject:data];
}
if (oth.count > 0) {
[ans addObject:oth];
}
return ans;
}

3、获取排号顺序的昵称数组的首字母。

+ (NSMutableArray *)getNameSectionArrayBy:(NSMutableArray *)array{
NSMutableArray *section = [[NSMutableArray alloc] init];

for (NSArray *item in array) {
NSString *user = [item objectAtIndex:0];
char c = [user.pinyin characterAtIndex:0];
if (!isalpha(c)) {
c = '#';
}
[section addObject:[NSString stringWithFormat:@"%c", toupper(c)]];
}
return section;
}

完结。。。新手谨以此记录，防止以后忘记找不到了。