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Añade un círculo rojo con un texto en blanco al icono de la aplicación en el dock

/ Published in: Objective C
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El texto en blanco viene definido por el parámetro theNumber.
La posición del texto viene definido por el parámetro theRect

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  1. -(void) updateApplicationIcon:(int) theNumber:(NSRect) theRect{
  2. 	// get the current app icon
  3. 	NSImage *appImage = [NSImage imageNamed:@"NSApplicationIcon"];
  4.  
  5. 	// create a new image and draw the app icon onto it
  6. 	NSImage *image = [[NSImage alloc] initWithSize:[appImage size]];
  7.  
  8. 	// lock focus on the new image and draw the app icon onto it.
  9. 	// you'll want the image flipped so text shows up correctly
  10. 	[image setFlipped:TRUE];
  11. 	[image lockFocus];
  12. 	NSSize appSize = [appImage size];	
  13. 	[appImage compositeToPoint:NSMakePoint(0, appSize.height) 
  14. 					 operation:NSCompositeSourceOver];
  15.  
  16. 	// draw red circle
  17. 	NSBezierPath *redCircle = [NSBezierPath bezierPathWithOvalInRect:NSMakeRect(8,43,45,45)];
  18. 	[[NSColor redColor] setFill];
  19. 	[redCircle fill];
  20.  
  21. 	// draw whatever else you want onto the image
  22. 	NSArray *values = [NSArray arrayWithObjects:[NSColor whiteColor], [NSFont fontWithName:@"Tahoma" size:32], nil];
  23. 	NSArray *keys = [NSArray arrayWithObjects:NSForegroundColorAttributeName, NSFontAttributeName, nil];
  24.  
  25. 	NSDictionary *attrs = [NSDictionary dictionaryWithObjects:values forKeys:keys];
  26. 	NSString *caption= [NSString stringWithFormat:@"%d", theNumber];
  27. 	NSAttributedString *text= [[NSAttributedString alloc] initWithString:caption attributes:attrs];
  28. 	[text drawInRect:theRect];
  29.  
  30. 	// unlock focus and set the new image as the dock icon
  31. 	[image unlockFocus];
  32. 	[NSApp setApplicationIconImage:image];
  33. }

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