NSString caseInsensitiveCompare example ios

caseInsensitiveCompare:

Returns the result of invoking compare:options: with NSCaseInsensitiveSearch as the only option.

- (NSComparisonResult)caseInsensitiveCompare:(NSString *)aString

Parameters

aString

The string with which to compare the receiver.

This value must not be nil. If this value is nil, the behavior is undefined and may change in future versions of OS X.

Return Value of [NSString caseInsensitiveCompare]

The result of invoking compare:options: with NSCaseInsensitiveSearch as the only option.

Discussion of [NSString caseInsensitiveCompare]

If you are comparing strings to present to the end-user, you should typically uselocalizedCaseInsensitiveCompare: instead.

Example of [NSString caseInsensitiveCompare]

NSString *rank = [[NSUserDefaults standardUserDefaults] stringForKey:@"Rank"];
 if ([rank caseInsensitiveCompare:@"MANAGER"] == NSOrderedSame) {
     // what happens if "Rank" is not found in standardUserDefaults
 }

Example of [NSString caseInsensitiveCompare]

NSArray *sortedValues = [[yourDictionary allValues] sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
NSMutableDictionary *orderedDictionary=[[NSMutableDictionary alloc]init];
for(NSString *valor in sortedValues){
    for(NSString *clave in [yourDictionary allKeys]){
        if ([valor isEqualToString:[yourDictionary valueForKey:clave]]) {
            [orderedDictionary setValue:valor forKey:clave];
        }
    }
}

Example of [NSString caseInsensitiveCompare]

NSArray *keys = [dict allKeys];
NSArray *sKeys = [keys sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
NSMutableArray *sValues = [[[NSMutableArray alloc] init] autorelease];

for(id k in sKeys) {
    id val = [dict objectForKey:k];
    [sValues addObject:val];
}