NSMutableArray *myPointArray = [[NSMutableArray alloc] init];
// add
CGPoint myPoint = CGPointMake(88.0f, 88.0f);
[myPointArray addObject:NSStringFromCGPoint(myPoint)];
// read
CGPoint retrievedPoint = CGPointFromString([myPointArray objectAtIndex:0]);
NSLog(@"retrievedPoint = %@", NSStringFromCGPoint(retrievedPoint));
[myPointArray release];