How to get a color image in iPhone sdk
Question
I want something as follows
UIImage *solid = [UIImage imageWithColor:[UIColor darkGrayColor]];
to create an image with respect to some color.
how to do it in iPhone sdk.
Solution
You can draw the color into a CGContext and then capture an image from it:
- (UIImage *)imageWithColor:(UIColor *)color andSize:(CGSize)size {
//Create a context of the appropriate size
UIGraphicsBeginImageContext(size);
CGContextRef currentContext = UIGraphicsGetCurrentContext();
//Build a rect of appropriate size at origin 0,0
CGRect fillRect = CGRectMake(0,0,size.width,size.height);
//Set the fill color
CGContextSetFillColorWithColor(currentContext, color.CGColor);
//Fill the color
CGContextFillRect(currentContext, fillRect);
//Snap the picture and close the context
UIImage *retval = UIGraphicsGetImageFromCurrentImageContext(void);
UIGraphicsEndImageContext();
return retval;
}
OTHER TIPS
If you're just trying to create a solid rectangle of colour why not just do something like
UIView *solid = [[UIView alloc] initWithFrame:someFrame];
solid.backgroundColor = [UIColor greyColor];
And then add the view to whatever subview you want to show the solid colour.
(That is, of course only if that's what you're trying to achieve. Maybe you aren't)
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