Defining a constant in objective-c

Question

I want to define a constant in objective-c.

Previously I had the following function:

+(NSString *) getDocumentsDir {
    NSArray *paths = NSSearchPat         


        

Answer 1

Small optimization regarding Peter N Lewis code:

-(NSString *) documentsDir {
    static NSString *documentsDir = nil;
    return documentsDir ?: (documentsDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject]);
}