How Can I draw shapes on a UIImageView that's in my main view? getting invalid context error?

Question

In my main view I have a user-defined class drawSquare that is a subclass of UIImageView. In drawSquare.m I have the normal drawRect method shown below:

- (void)drawRect:(CGRect)rect
{
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetLineWidth(context, 2.0);
    CGContextSetStrokeColorWithColor(context,[UIColor redColor].CGColor);
    redSquare = CGRectMake(2,2,30,34);
    CGContextAddRect(context, redSquare);
    CGContextStrokePath(context);
}

In my main view controller I have an object named word1Area of type drawSquare as an IBOutlet. In my viewDidLoad method of my main view controller I have the lines:

[self.view addSubview:word1Area];
[word1Area drawRect:word1Area.frame];

I get an "invalid context" run time error. I have tried other variations of calling the drawRect method but keep getting the same error. Thanks for any help.

have you seen this answer http://stackoverflow.com/questions/13153223/how-to-crop-the-image-using-uibezierpath/15353848#15353848 — umer sufyan, May 31 '13 at 05:23

score 0 · Answer 1 · answered May 30 '13 at 22:34

0

You cannot call drawRect yourself - you can tell the view setNeedsDisplay.

answered May 30 '13 at 22:34

David H

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How Can I draw shapes on a UIImageView that's in my main view? getting invalid context error?

1 Answers1