如何在搜索列表中首先获得相同名称的结果 iOS

Question

大家好，我需要你们的帮助。我希望像图像中那样，如果我搜索胡萝卜列表应该首先显示胡萝卜，就像首先显示具有相同名称的元素，如果元素包含这些文本列表，那是可能的

 NSString *predicateString;

            NSString * tempString;

            if (string.length > 0) {
                tempString = [NSString stringWithFormat:@"%@%@",textField.text, string];
            } else {
                tempString = [textField.text substringToIndex:[textField.text length] - 1];
            }

                predicateString = [NSString stringWithFormat:@"SELF.title contains [cd] \"%@\" ", tempString];

            NSLog(@"Ingredent Array  :- %@ ",allIngrediantArr);

            NSPredicate *predicate = [NSPredicate predicateWithFormat:predicateString];
            if (allIngrediantArr.count>0) {
                searchFilterdArr = [NSMutableArray arrayWithArray:[allIngrediantArr filteredArrayUsingPredicate:predicate]];
            }

Answer 1

你可以备用

开始

predicateString = [NSString stringWithFormat:@"SELF.title BEGINSWITH [cd] \"%@\" ", tempString];

包含 ||开始

如果你想要两者（包含||开头），那么使用

NSPredicate *predicate = [NSPredicate predicateWithFormat:
                      @"(SELF.title BEGINSWITH [cd] \"%@\") OR (SELF.title CONTAINS [cd] \"%@\")", tempString, tempString];

匹配 ||开始

  NSPredicate *predicate = [NSPredicate predicateWithFormat:
                      @"(SELF.title BEGINSWITH [cd] \"%@\") OR (SELF.title MATCHES [cd] \"%@\")", tempString, tempString];

查看 NSPredicate string comparison

Answer 2

您可以通过比较搜索字符串的范围来过滤searchFilterdArr数组。

  NSString *searchStr = @"carrot";  
  NSArray *searchFilterdArr = [[NSArray alloc ] initWithObjects:@{@"title":@"baby carrot"},@{@"title":@"baby purple carrot"},@{@"title":@"carrot"}, nil];
  NSLog(@"%@",searchFilterdArr);
  id mySort = ^(NSDictionary * obj1, NSDictionary * obj2){
    return [[obj1 valueForKey:@"title"] rangeOfString:searchStr].location > [[obj2 valueForKey:@"title"] rangeOfString:searchStr].location;
  };
  NSArray * sortedMyObjects = [searchFilterdArr sortedArrayUsingComparator:mySort];
  NSLog(@"%@",sortedMyObjects);

searchFilterdArr

{ title = "baby carrot"; }, { title = "baby purple carrot"; }, { title = "carrot"; }

sortedMyObjects

{ title = "carrot"; }, { title = "baby carrot"; }, { title = "baby purple carrot"; }

如何在搜索列表中首先获得相同名称的结果 iOS

How to get same name results first in search list iOS

sorting

objective-c

nspredicate

ios