CODEWITHSUNDEEP
iosobjective-cxcodeuibezierpath
Sagar
Sagar

Reputation: 1304

I am not able to delete single dot drawn from UIBezierpath Path

I am using UIBezierpath to draw a dot on my UIView. I followed this link for the same.

How can i draw a dot on the screen on touchesEnded using UIBezierpath

Now when I am done with this, I am able to add "dots" as much as I can. and adding these dots to an array and showing them on UIView.

If I clean the array on selection of eraser then all dots are getting cleared. I am not able to clear single/particular dot.

This is the method used for adding dots to an array and showing them on UIView.

- (void)drawRect:(CGRect)rect
{
    [incrementalImage drawInRect:rect];
         for (int i = 0; arrayOfDots.count>i;i++)
         {
             UIBezierPath *path = [arrayOfDots objectAtIndex:i];
             UIColor *color = [arrayOfDotColor objectAtIndex:i];
             [color setFill];
             [path fill];
         }
}

I have eraser to clean the things drawn on UIView. I am able to clean the lines drawn using UIBezierpath, but I am not able to clear the dot drawn using same UIBezierpath.

Eraser is nothing but, I am just picking the white colour and drawing the same white colour on my current view.

here is the code for eraser.

self.strockColour = [UIColor colorWithRed:255.0/255.0 green:255.0/255.0 blue:255.0/255.0 alpha:1.0f];

[objBezierpath setLineWidth:25];

Can any one guide me for the same on how to delete particular selected dot.

Thanks in advance.

Upvotes: 0

Views: 202

Answers (1)

user3230875
user3230875

Reputation: 689

If I understand your code fragment correctly, you are instantiating a new UIBezierPath object for every dot in the array.

So if you wish to erase a given dot, you will need the array of points to be mutable, and you would need to delete the actual path object from the array.

I suggest that you create a single UIBezierPath object and have an array that stores only the CGPoints.

Upvotes: 1

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