我试图通过比较列表中的值('stringToCompare')和用户输入的搜索文本('searchText')来进行过滤。代码段如下。
NSComparisonResult result = [stringToCompare compare:searchText options:(NSCaseInsensitiveSearch|NSDiacriticInsensitiveSearch) range:NSMakeRange(0, [searchText length])];
NSLog(@"Search text: %@", searchText);
NSLog(@"string to compare: %@", stringToCompare);
NSLog(@"result: %i", result);
NSLog(@"NSOrderedsame: %i", NSOrderedSame);
if (result == NSOrderedSame)
{
[self.filteredListContent addObject:genericObj];
}
但是,从下面的NSLog结果中可以看出,我似乎无法获得预期的结果。在这种情况下,我希望结果为'0',因为搜索文本'Xot'可以作为'stringToCompare'的一部分找到。我在这里缺少什么?
2012-01-02 05:13:59.184 onethingaday[5815:707] search text: Xot
2012-01-02 05:13:59.185 onethingaday[5815:707] string to compare: One exotic place you got laid in before. How was it?
2012-01-02 05:13:59.188 onethingaday[5815:707] result: -1
2012-01-02 05:13:59.188 onethingaday[5815:707] NSOrderedsame: 0
答案 0 :(得分:2)
您正在比较整个字符串,而不是寻找出现的情况。试试这个:
NSRange r = [stringToCompare rangeOfString:searchText
options:NSCaseInsensitiveSearch];
if ( r.location != NSNotFound )
{
NSLog(@"String found at position: %d",r.location);
}
答案 1 :(得分:1)
-compare:
不搜索子字符串,它会比较范围内的完整字符串。你得到了预期的结果,向你展示字符串'Xot'如何与完整的字符串'你之前放置的一个异国情调的地方相比。怎么回事?'。