NSRange非連續字符串搜索

Question

我的字符串是

NSString *str= @"Hello Hi How Are You Thank you"; 

如果我搜索「喜怎麼樣」或「你」或「謝謝」我使用NSCaseInsensitiveSearch得到的結果。

NSRange r=[searchable rangeOfString:@"hi how" options:NSCaseInsensitiveSearch] 

if(r.location!=NSNotFound) 

NSLog(@"true"); 

但是，如果我搜索「你好」或「你好」。我沒有得到任何結果。

NSRange r=[searchable rangeOfString:@"hi you" options:NSCaseInsensitiveSearch] 

if(r.location!=NSNotFound) 

NSLog(@"true"); 

請幫我取得理想的效果。

感謝

Answer 1

不知道這是否是你想要

NSString *str= @"Hello Hi How Are You Thank you"; 

NSRange r1= [str rangeOfString:@"hi" options:NSCaseInsensitiveSearch]; 
NSRange r2 = [str rangeOfString:@"you" options:NSCaseInsensitiveSearch]; 
if(r1.location!=NSNotFound && r2.location!=NSNotFound && r2.location > r1.location) 
{ 
    NSLog(@"true"); 
} 

Answer 2

你實際上做的是所謂的「過濾」，而不是什麼「排序」。在斯威夫特，你可以按照如下

var stringArray: [NSString] = ["a b c 2", "a d c 3", "a s d f c"] 

let filterString = "a c" 

stringArray.filter { (element) -> Bool in 
    let filterComponents = filterString.componentsSeparatedByString(" ") 
    for component in filterComponents { 
     let range = element.rangeOfString(element as String, options: .CaseInsensitiveSearch) 
     if range.location == NSNotFound { 
      return false 
     } 
    } 

    return true 
} 

print(stringArray) 

，它將打印[a b c 2, a d c 3, a s d f c]實現所需的行爲。

Objective-C中的等效代碼片段如下。

NSArray *stringArray = @[@"a b c 2", @"a d c 3", @"a s d f c"]; 

NSString *filterString = @"a c"; 
NSArray *filterComponents = [filterString componentsSeparatedByString:@" "]; 

NSMutableArray *filteredArray = [[NSMutableArray alloc] init]; 

for (NSString *string in stringArray) { 
    bool matchesFilter = YES; 

    for (NSString *component in filterComponents) { 
     NSRange range = [string rangeOfString:component options:NSCaseInsensitiveSearch]; 
     if (range.location == NSNotFound) { 
      // don't include in filteredArray 
      matchesFilter = NO; 
      break; 
     } 
    } 

    if (matchesFilter) { 
     [filteredArray addObject:string]; 
    } 

} 

NSLog(@"%@", filteredArray); 

這將打印("a b c 2", "a d c 3", "a s d f c")。