实现目标：数组中文字，按照首字母排序，并相同字放置一起（若首字母相同，查找第二个字母）
工具：X-code
大致思路：分两次实现，第一次按照字母排序，第二次判断首位汉字
注意：本次使用的的数组，是一个模型数组，汉字是模型数组中备注昵称（如果没有，则取模型中的名字）,如有需求，请自行修改
1.常规冒泡算法排序，按字母排序
+ (NSMutableArray *)paiduWithList:(NSArray *)list{
NSMutableArray *people = [NSMutableArray arrayWithArray:list];
for (int i = 0; i < people.count; ++i) {
for (int j = 0; j < people.count-1; ++j) {
LYOnePeopleModel *model1 = people[j];
LYOnePeopleModel *model2 = people[j+1];
if ([self isBiggerwithOne:model1 andTwo:model2]) {
[people exchangeObjectAtIndex:j withObjectAtIndex:j+1];
}
}
}
NSMutableArray *arr = [self keywordPaixuList:people];
return arr;
}
2.上个步骤中使用的比较方法
+ (BOOL)isBiggerwithOne:(LYOnePeopleModel *)model1 andTwo:(LYOnePeopleModel *)model2{
NSString *name1; NSString *name2;
if (model1.remarkName.length > 0 && ![model1.remarkName isEqualToString:@""] && ![model1.remarkName isEqualToString:@"(null)"]) {
name1 = model1.remarkName;
}else{
name1 = model1.name;
}
if (model2.remarkName.length > 0 && ![model2.remarkName isEqualToString:@""] && ![model2.remarkName isEqualToString:@"(null)"]) {
name2 = model2.remarkName;
}else{
name2 = model2.name;
}
//将取出的名字转换成字母
NSMutableString *pinyin1 = [name1 mutableCopy];
CFStringTransform((__bridge CFMutableStringRef)pinyin1, NULL, kCFStringTransformMandarinLatin, NO);
CFStringTransform((__bridge CFMutableStringRef)pinyin1, NULL, kCFStringTransformStripCombiningMarks, NO);
//将拼音转换成大写拼音
NSString * upPinyin1 = [pinyin1 uppercaseString];
//取出第一个首字母当做字典的key
NSString * firstStr1 = [upPinyin1 substringToIndex:1];
NSMutableString *pinyin2 = [name2 mutableCopy];
CFStringTransform((__bridge CFMutableStringRef)pinyin2, NULL, kCFStringTransformMandarinLatin, NO);
CFStringTransform((__bridge CFMutableStringRef)pinyin2, NULL, kCFStringTransformStripCombiningMarks, NO);
//将拼音转换成大写拼音
NSString * upPinyin2 = [pinyin2 uppercaseString];
//取出第一个首字母当做字典的key
NSString * firstStr2 = [upPinyin2 substringToIndex:1];
if (firstStr1 > firstStr2) {
return YES;
}else if (firstStr1 < firstStr2){
return NO;
}else{
//如果相等比较第二位
if (upPinyin1.length > 1) {
if (upPinyin2.length > 1) {
//判断第二位
NSString *secStr1 = [upPinyin1 substringWithRange:NSMakeRange(1, 1)];
NSString *secStr2 = [upPinyin2 substringWithRange:NSMakeRange(1, 1)];
if (secStr1 > secStr2) {
return YES;
}else if (secStr1 < secStr2){
return NO;
}else{
if (upPinyin1.length > 2) {
//判断第三位
if (upPinyin2.length > 2) {
NSString *treStr1 = [upPinyin1 substringWithRange:NSMakeRange(2, 1)];
NSString *treStr2 = [upPinyin2 substringWithRange:NSMakeRange(2, 1)];
if (treStr1 > treStr2) {
return YES;
}else if (treStr1 < treStr2){
return NO;
}else{
if (upPinyin1.length > 3) {
//判断第四位
NSString *fourStr1 = [upPinyin1 substringWithRange:NSMakeRange(3, 1)];
NSString *fourStr2 = [upPinyin2 substringWithRange:NSMakeRange(3, 1)];
if (fourStr1 > fourStr2) {
return YES;
}else{
return NO;
}
}else{
return NO;
}
}
}else{
return YES;
}
}else{
return NO;
}
}
}else{
return YES;
}
}else{
return NO;
}
}
}
3.按照汉字第一位相同的，放置一起
+ (NSMutableArray *)keywordPaixuList:(NSArray *)list{
NSMutableArray *people = [NSMutableArray arrayWithArray:list];
int num = 0;
for (int i = 0; i < people.count; ++i) {
int creat = 1;
for (int j = num+creat; j < people.count; j++) {
LYOnePeopleModel *model1 = people[i];
LYOnePeopleModel *model2 = people[j];
NSString *name1; NSString *name2;
if (model1.remarkName.length > 0 && ![model1.remarkName isEqualToString:@""] && ![model1.remarkName isEqualToString:@"(null)"]) {
name1 = model1.remarkName;
}else{
name1 = model1.name;
}
if (model2.remarkName.length > 0 && ![model2.remarkName isEqualToString:@""] && ![model2.remarkName isEqualToString:@"(null)"]) {
name2 = model2.remarkName;
}else{
name2 = model2.name;
}
if ([[name1 substringToIndex:1] isEqualToString:[name2 substringToIndex:1]]) {
[people exchangeObjectAtIndex:num+creat withObjectAtIndex:j];
creat++;
}
}
num = num+creat;
i = num-1;
}
return people;
}
这样基本就可以实现，原谅楼主不会排布简书页面，抱歉
