That is the one that makes problem.

when you read and write with NSMutableArray, you should use them as a property.

How to do that?

Try the following line.

@property (nonatomic, retain) NSMutableArray *dotArray;

That's all.
Posted by ParkPill 박필

CGPoint로는 MutableArray를 사용할 수가 없네;

왜 List를 만들어 놓지 않은 걸까;;

List<CGPoint> list;

이러면 얼마나 쉽니;;

암턴 해결 방법은 아래와 같다.

NSMutableArray * pointArray = [NSMutableArray array];

[pointArray addObject:[NSValue valueWithCGPoint:location]];

[pointArray addObject:[NSValue valueWithCGPoint:lastPoint]];


CGPoint retrievedPoint = [[pointArray objectAtIndex:0] CGPointValue];

Posted by ParkPill 박필