We wanted to set up an array of CGPoints but failed, in the properties....
We had to do it with a NSMutableArray. But how to get the CGPoints in?
the answer is found here:
http://stackoverflow.com/questions/943945/how-to-form-cgpoint-array-in-objective-c
so:
@interface OrbitLinesDrawView : UIView {
UIColor *strokeColor;
UIColor *rectColor;
CGFloat strokeWidth;
CGFloat cornerRadius;
NSMutableArray* orbitLinePointsArray ;
}
@property (nonatomic, retain) NSMutableArray* orbitLinePointsArray ;
and then in the .m file:
@synthesize orbitLinePointsArray;
in the init:
orbitLinePointsArray = [[NSMutableArray alloc]init ];
for (int i = 0; ... etc....)
CGPoint aPoint = CGPointMake(100 - 10*i, 200+10*i);
NSValue* pointValueObject = [NSValue valueWithCGPoint:aPoint];
[orbitLinePointsArray addObject:(NSValue*)pointValueObject];
}
(dont forget to alloc the orbitLinePointsArray)
for setting the CGPoints later on:
-(void)setObjectInPointArray: (int)positionInArray : (CGPoint) myPoint
{
NSValue* pointValueObject = [NSValue valueWithCGPoint:myPoint];
[ orbitLinePointsArray replaceObjectAtIndex:positionInArray withObject:pointValueObject ];
}
drawing the points in the
-(void)drawLines {
...
...
...
CGPoint lineArray[2];
for(int i=0 ; ... etc....)
{
lineArray[0] = ((CGPoint) [[orbitLinePointsArray objectAtIndex:i] CGPointValue]);
lineArray[1] = ((CGPoint) [[orbitLinePointsArray objectAtIndex:i+1] CGPointValue]);
CGContextAddLines ( context, lineArray, 2 );
CGContextStrokePath(context);
}
[self setNeedsDisplay];
}
- (void)drawRect:(CGRect)rect {
[ self drawLines ];
}
so Objective C, Cocoa, ....whatever....wrap it up in further and further objects, that seems to be Apple.....
