Getting incompatible integer to pointer error - objective-c

Question

Im getting the error incompatible integer to pointer conversion returning unsigned int from a function with result type NSUInteger *
I'm not sure what is that mean since they are kind of the same, no..? sorry im totally a newbie, here is my code for my PlayingCards deck class:
PlayingCards.h
#import "Card.h"
#interface PlayingCards : Card
#property (strong, nonatomic) NSString *suit;
#property (nonatomic) NSUInteger rank;
+(NSArray *) validSuit;
+(NSUInteger *) maxRank;
#end
PlayingCards.m
#import "PlayingCards.h"
#implementation PlayingCards
#synthesize suit = _suit;
//modifying the contents getter so it will return array with the ranks and rank+suit
-(NSString *) contents {
NSArray *cardsRank = [PlayingCards rankStrings];
return [cardsRank[self.rank] stringByAppendingString:self.suit];
}
//creating a method to make sure we get validated suits
+(NSArray *) validSuit {
return #[#"♠",#"♣",#"♥",#"♦"];
}
//creating calss method to validate the rank
+(NSArray *) rankStrings {
return #[#"?",#"A",#"2",#"3",#"4",#"5",#"6",#"7",#"8",#"9",#"10",#"J",#"Q",#"K"];
}
//creating a new setter for suit to make sure we get the valitated suits, uding the validateSuit method
-(void) setSuit:(NSString *)suit {
if ([[PlayingCards validSuit] containsObject:suit]) {
_suit = suit;
}
}
//creating new getter for suit to make sure its not empty
-(NSString *) suit {
return _suit? _suit: #"?";
}
//creating a class method to make sure when user set the rank he will will
+(NSUInteger *) maxRank {
return [self rankStrings].count - 1;
}
//creating a new setter to the renk to make sure the rank is validates
-(void) setRank:(NSUInteger)rank {
if (rank <= [PlayingCards maxRank]) {
_rank = rank;
}
}
#end
please help me to figure this out, its in the line (in the .m file):
+(NSUInteger *) maxRank {
return [self rankStrings].count - 1;
}
And effecting on the line:
-(void) setRank:(NSUInteger)rank {
if (rank <= [PlayingCards maxRank]) {
_rank = rank;
}
}
With another error
order comparison between pointer and integer
thanks!

Answer 1

This usually means you have tried to accidentally use a pointer where you should not. Or didn't use a pointer where you should have.
Your class method is returning a pointer to your NSUInteger. Remove the *