转自：http://www.jianshu.com/p/70b4f9c0cc4e

写app的时候经常会遇到需要进行本地模糊搜索的场景，然后我想能不能直接写成标准化的，传入model数据源 然后指定搜索字段，最后传出过滤后的model数组形成标准化任何地方都适用。直接贴代码

首先写一个类扩展继承于NSObject利用拿到这个model指定key的value

- (NSMutableString *)GetPropertyValueStrArr:(NSArray *)arr{

    NSMutableString *mstr = [[NSMutableString alloc]init];

    for (int i = 0; i<arr.count; i++){

        NSString *propertyName = arr[i];

        id propertyValue = [self valueForKey:(NSString *)propertyName];

        if (propertyValue){

            if ([self zhongwen:propertyValue]) {
                //中文转英文

                propertyValue = [ChineseToPinyin pinyinFromChiniseString:propertyValue];

            }else if ([self yingwen:propertyValue]) {

                //英文转大写

                propertyValue = [propertyValue uppercaseString];
            }
            [mstr appendFormat:@"%@",propertyValue];
        }
    }

    return mstr;
}


- (BOOL)yingwen:(NSString*)str
{
    //正则 a-z  A-Z
    NSString *passWordRegex = @"[a-zA-Z]";

    //正则匹配
    NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",passWordRegex];

    //截取第一个字符判断
    BOOL a = [passWordPredicate evaluateWithObject:[str substringToIndex:1]];

    return a ;
}


//判断是否为中文
- (BOOL)zhongwen:(NSString*)str{

    //截取第一个字符
    NSString*sub = [str substringToIndex:1];

    unichar c = [sub characterAtIndex:0];
    if (c >=0x4E00 && c <=0x9FFF)
        return YES ;
    return NO;
}

然后在写一个SearchBarView继承于UISearchBar

.h

//需要去搜索的指定字段
@property (nonatomic,strong)NSArray *searchKyeArr;

//搜索数据源
@property (nonatomic,strong)NSMutableArray *dataArr;

@property (nonatomic,copy)void(^searchResult)(NSMutableArray *result);

.m

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText{

    _searchResultArr = [NSMutableArray array];

    for (int i = 0; i < _dataArr.count; i ++) {

        if (searchText.length > 0) {

            if ([self zhongwen:searchText]) {

                searchText = [self pinyinFromChiniseString:searchText];


            }else if ([self yingwen:searchText]) {

                searchText = [searchText uppercaseString];
            }
        }



        id model = _dataArr[i];

        NSMutableString *searchStr = [model GetPropertyValueStrArr:_searchKyeArr];

        NSRange range = [searchStr rangeOfString:searchText];


        if (range.length > 0) {

            if (![_searchResultArr containsObject:model]) {

                [_searchResultArr addObject:model];
            }

        }else{

            [_searchResultArr removeObject:model];

        }
    }

    if (searchText.length > 0) {

        self.searchResult(_searchResultArr);

    }else{

        self.searchResult(_dataArr);

    }
}

完成。任何列表只要传入数据源，和指定需要搜索这个数据源里面model的字段就可也完成搜索。

汉字搜索对比图.png

字母搜索对比图.png