NSPredicate - Dynamic predicate with arguments - ios

Question

I am new to NSPredicates, but I know the basics.
This is how my predicate looks now:
[NSPredicate predicateWithFormat:#"name contains[c] %#", searchText];
What I want to do, is to be able to create a predicate like this (Pseudo code):
NSPredicate *myPredicate = [NSPredicate predicateWithBaseString:#"name contains[c] _ARGUMENT_"];
And then use it in, for example a loop (pseudo code):
for(NSString *searchString in self.allStrings)
{
NSPredicate *myNewPredicate = [myPredicate predicateWithArgument:searchString];
//Here I do the searchOperations with my new predicate
}
I want to do this so that I can have a few base predicates and then put parameters on them for searching. I do not want to create my predicate again.
Hopefully you understand.
Thank you!

Answer 1

Use following
NSPredicate *myPredicate = [NSPredicate predicateWithFormat:#"name contains[c] $ARGUMENT"];
for(NSString *searchString in self.allStrings)
{
NSPredicate *myNewPredicate = [myPredicate predicateWithSubstitutionVariables:#{#"ARGUMENT" :searchString}];
//Here I do the searchOperations with my new predicate
}
also I suggest to read this article http://nshipster.com/nspredicate/

Answer 2

It seems as if i just found the answer. I can use predicateWithSubstitutionVariables like this:
NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:#"name contains[c] $searchText"];
NSDictionary *sub = [NSDictionary dictionaryWithObject:searchText forKey:#"searchText"];
NSPredicate *filter = [resultPredicate predicateWithSubstitutionVariables:sub];