Question

If there is an NSString like “com.mycompany.purchase1” How to get only purchase1.

NSString *mainString = @"com.mycompany.purchase1";

-(NSString*)getLastComponent : (NSString*) mainString
{
NSString *string;
//Implementation
return string;//It should return only "purchase1"
}

I tried using lastPathComponent,pathExtension and also i can’t use substringToIndex since the string may be of varying length.

Answer 1

Don’t want donkim’s answer as he is correct. Just showing the implementation I would use

-(NSString*)lastComponentOfString:(NSString*)string separatedByString:(NSString*)separator
{
    return [[string componentsSeparatedByString:separator] lastObject];
}

Use

NSString *string = @"com.mycompany.purchase1";
[... lastComponentOfString:string separatedByString:@"."];