A simple linked list object in Objective-C

gistfile1.m

@interface TRHLinkedNode : NSObject

@property (nonatomic, strong) NSString *dogName;
@property (nonatomic, string) TRHLinkedNode *nextNode;

- (void)appendItemToEnd(TRHLinkedNode *)item;

+ (void)searchAndDeleteFromLinkedList:(NSString *)dog afterItem:(TRHLinkedNode)headNode; 

@end

@implementation TRHLinkedNode

- (void)appendItemToEnd(TRHLinkedList *)item {
  TRHLinkedNode *n = self;
  while (n.nextNode) {
    n = n.nextNode;
  }
  n.nextNode = item;
}

+ (void)searchAndDeleteFromLinkedList:(NSString *)dog afterItem:(TRHLinkedNode)headNode {
  TRHLinkedNode *parentNode;
  TRHLinkedNode *currentNode = headNode;
  BOOL stop = NO;
  while (!stop) {
    if ([currentNode.dogName isEqualToString:dog]) {
      parentNode.nextNode = currentNode.nextNode;
      currentNode.nextNode = nil;
      stop = YES;
    } else {
      if (!currentNode.nextNode) {
        stop = YES;
      }
    }
  }
}
/*
 * Implement like so:
 * TRHLinkedNode *item1 = [[TRHLinkedNode alloc] init];
 * TRHLinkedNode *item2 = [[TRHLinkedNode alloc] init];
 * item1.name = @"Watson";
 * item2.name = @"Luna";
 * item1.nextNode = item2;
 * TRHLinkedNode *item3 = [[TRHLinkedNode alloc] init];
 * item3.name = @"Cheese";
 * [item1 appendItemToEnd:item3];
 * [TRHLinkedNode searchAndDeleteFromLinkedList:@"Luna" afterItem:item1];
 */