My question is similar to How do I check if a string contains another string in Objective-C?
How can I check if a string (NSString) contains another smaller string but with ignoring case?
NSString *string = @"hello bla bla";
I was hoping for something like:
NSLog(@"%d",[string containsSubstring:@"BLA"]);
Anyway is there any way to find if a string contains another string with ignore case ? But please do not convert both strings to UpperCase or to LowerCase.
As similar to the answer provided in the link, but use options.
See - (NSRange)rangeOfString:(NSString *)aString options:(NSStringCompareOptions)mask in Apple doc
NSString *string = @"hello bla bla";
if ([string rangeOfString:@"BLA" options:NSCaseInsensitiveSearch].location == NSNotFound)
{
NSLog(@"string does not contain bla");
}
else
{
NSLog(@"string contains bla!");
}
From iOS 8 you can add the containsString: or localizedCaseInsensitiveContainsString method to NSString.
if ([string localizedCaseInsensitiveContainsString:@"BlA"]) {
NSLog(@"string contains Case Insensitive bla!");
} else {
NSLog(@"string does not contain bla");
}
NSString *string = @"hello BLA";
if ([string rangeOfString:@"bla" options:NSCaseInsensitiveSearch].location == NSNotFound) {
NSLog(@"string does not contain bla");
} else {
NSLog(@"string contains bla!");
}
The method
[string rangeOfString:@"bla" options:NSCaseInsensitiveSearch];
should help you.
You can use -(NSRange)rangeOfString:(NSString *)aString options:(NSStringCompareOptions)mask; to get a range for a substring, the mask parameter is used to specify case insensitive match.
Example :
NSRange r = [str rangeOfString:@"BLA"
options:NSCaseInsensitiveSearch];
As stated in the documentation, the method returns a range like {NSNotFound, 0} when the substring isn't found.
BOOL b = r.location == NSNotFound;
Important this method raises an exception if the string is nil.
For Swift 4:
extension String {
func containsCaseInsensitive(string : String) -> Bool {
return self.localizedCaseInsensitiveContains(string)
}
}
Usage:
print("Hello".containsCaseInsensitive(string: "LLO"))
Output:
true
NSRegularExpression.