search if NSString contains value - objective-c

Question

I have some string value which constructed from a few characters , and i want to check if they exist in another NSString, without case sensitive, and spaces .
Example code :
NSString *me = #"toBe" ;
NSString *target=#"abcdetoBe" ;
//than check if me is in target.
Here i will get true because me exist in target .
How can i check for such condition ?
I have read How do I check if a string contains another string in Objective-C? but its case sensitive and i need to find with no case sensitive..

Answer 1

Use the option NSCaseInsensitiveSearch with rangeOfString:options:
NSString *me = #"toBe" ;
NSString *target = #"abcdetobe" ;
NSRange range = [target rangeOfString: me options: NSCaseInsensitiveSearch];
NSLog(#"found: %#", (range.location != NSNotFound) ? #"Yes" : #"No");
if (range.location != NSNotFound) {
// your code
}
NSLog output:
found: Yes
Note: I changed the target to demonstrate that case insensitive search works.
The options can be "or'ed" together and include:
NSCaseInsensitiveSearch
NSLiteralSearch
NSBackwardsSearch
NSAnchoredSearch
NSNumericSearch
NSDiacriticInsensitiveSearch
NSWidthInsensitiveSearch
NSForcedOrderingSearch
NSRegularExpressionSearch

Answer 2

-(BOOL)substring:(NSString *)substr existsInString:(NSString *)str {
if(!([str rangeOfString:substr options:NSCaseInsensitiveSearch].length==0)) {
return YES;
}
return NO;
}
usage:
NSString *me = #"toBe";
NSString *target=#"abcdetoBe";
if([self substring:me existsInString:target]) {
NSLog(#"It exists!");
}
else {
NSLog(#"It does not exist!");
}

Answer 3

As with the release of iOS8, Apple added a new method to NSStringcalled localizedCaseInsensitiveContainsString. This will exactly do what you want:
Swift:
let string: NSString = "ToSearchFor"
let substring: NSString = "earch"
string.localizedCaseInsensitiveContainsString(substring) // true
Objective-C:
NSString *string = #"ToSearchFor";
NSString *substring = #"earch";
[string localizedCaseInsensitiveContainsString:substring]; //true