Matching Strings in Objective C

Question

I have a for loop which loops through an array and want to match a search field's text to an object in the array.

I have the following code

for (int i = 0; i < [data2 count]; i++) {
    if ([data2 objectAtIndex:i] == searchField.text) {
        NSLog(@"MATCH");
            break;
    }
}

I know in Java it can be done by e.g. if(searchField.text.equalsIgnoreCase(the object to match against))

How is this done in objective C, to match the string without case?

Also, what if I wanted to match part of the string, would that be done in Obj C char by char or is there a built in function for matching parts of Strings?

Thanks

Pretty close to: [Understanding NSString comparison in Objective-C ](http://stackoverflow.com/questions/3703554/understanding-nsstring-comparison-in-objective-c), but you want `caseInsensitiveCompare:`. — Carl Norum, Sep 27 '10 at 06:37

Kris Markel · Accepted Answer · 2010-09-27T06:49:07.707

4

Assuming your strings are NSStrings, you can find your answers at the NSString Class Reference

NSString supports caseInsensitiveCompare: and rangeOfString: or rangeOfString:options: if you want a case insensitive search.

The code would look like this:

if (NSOrderedSame == [searchField.text caseInsensitiveCompare:[data2 objectAtIndex:i]) {
    // Do work here.
}

edited Sep 27 '10 at 06:49

answered Sep 27 '10 at 06:43

Kris Markel

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score 3 · Answer 2 · answered Sep 27 '10 at 06:42

3

[[data2 objectAtIndex:i] isEqualToString: searchField.text]

answered Sep 27 '10 at 06:42

RolandasR

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This comparison would be case sensitive. – Kris Markel Sep 27 '10 at 07:02

score 2 · Answer 3 · answered Sep 27 '10 at 06:43

2

You use isEqual: (to compare objects in general) or isEqualToString: (for NSStrings specifically). And you can get substrings with the substringWithRange: method.

answered Sep 27 '10 at 06:43

Chuck

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Matching Strings in Objective C

3 Answers3