CGContextShowTextAtPoint: invalid context

Posted by coure06 on Stack Overflow See other posts from Stack Overflow or by coure06
Published on 2010-05-26T18:30:16Z Indexed on 2010/05/26 18:31 UTC
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Filed under:

objective-c

|

iphone-sdk

|

quartz-2d

I want to call a method responsible for drawing text on screen after each 5 seconds. Here is my code
-(void) handleTimer: (NSTimer *)timer { CGContextRef context = UIGraphicsGetCurrentContext();



CGContextSetLineWidth(context, 2.0); 
 CGContextSetStrokeColorWithColor(context, currentColor.CGColor); 

CGContextTranslateCTM(context, 145.0, 240.0);
 CGContextScaleCTM(context, 1.0, -1.0); 
 CGContextSelectFont(context, "Arial", 18, kCGEncodingMacRoman);
 CGContextSetCharacterSpacing(context, 1);
 CGContextSetTextDrawingMode(context, kCGTextFillStroke);

CGContextSetRGBStrokeColor(context, 0.5,0.5,1,1); CGContextShowTextAtPoint(context, 100, 100, "01", 2); }
But after 5 seconds when this method is called i am getting this error
CGContextShowTextAtPoint: invalid context

Another thing is how to show a thinner font?

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