[IPhone Dev] NSMutableArray Bad Access -while NSMutableArray reading

nonatomic


That's the one we have to know.


Im not describe what it is because that is not you wanna know :p


So i just get to the point.


if you get bad access error when you read a NSMutableArray, you may wanna use the array in @property way.


make it as a property then use like this


self.dotArray

@property (nonatomic, retain) NSMutableArray *dotArray;

  



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[IPhone Dev] CGPoint in NSMutableArray

Cannot use NSMutableArray with CGPoint.


In .net we use like this


List<CGPoint> list;


but since we don't have that in objective-c, we use this.

NSMutableArray * pointArray = [NSMutableArray array];

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

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

        

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

 
no more words to say.


That's all~



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