I was looking for a solution and DotSlashSlash has the answer hidden in one of the comments! For the sake of completeness, the answer and the simplest solution is: UIImage *myGradient = [UIImage imageNamed:@”textGradient.png”]; myLabel.textColor = [UIColor colorWithPatternImage:myGradient];
OK. Having tried I don’t know how many versions of these solutions, I have my own customised version. What I’ve found is that the solution from @yubenyi works quite well, but if you want to take the output from his changeWhiteColorTransparent() function and pass it back in, it doesn’t work. My first step was to … Read more
You can create an animated GIF using the Image I/O framework (which is part of the iOS SDK). You will also want to include the MobileCoreServices framework, which defines the GIF type constant. You need to add these frameworks to your target, and import their headers in the file where you want to create the … Read more
Instead of CGContextDrawImage(context, CGRectMake(0, 0, 145, 15), image.CGImage); Use [image drawInRect:CGRectMake(0, 0, 145, 15)]; In the middle of your begin/end CGcontext methods. This will draw the image with the correct orientation into your current image context – I’m pretty sure this has something to do with the UIImage holding onto knowledge of the orientation while … Read more
After you set your screen rect, do something like the following to decide what rect to draw the image in: float hfactor = value.bounds.size.width / screenRect.size.width; float vfactor = value.bounds.size.height / screenRect.size.height; float factor = fmax(hfactor, vfactor); // Divide the size by the greater of the vertical or horizontal shrinkage factor float newWidth = value.bounds.size.width … Read more
I was able to do it by overriding drawTextInRect: – (void)drawTextInRect:(CGRect)rect { CGSize shadowOffset = self.shadowOffset; UIColor *textColor = self.textColor; CGContextRef c = UIGraphicsGetCurrentContext(); CGContextSetLineWidth(c, 1); CGContextSetLineJoin(c, kCGLineJoinRound); CGContextSetTextDrawingMode(c, kCGTextStroke); self.textColor = [UIColor whiteColor]; [super drawTextInRect:rect]; CGContextSetTextDrawingMode(c, kCGTextFill); self.textColor = textColor; self.shadowOffset = CGSizeMake(0, 0); [super drawTextInRect:rect]; self.shadowOffset = shadowOffset; }
For anyone else wondering how to draw an inner shadow using Core Graphics as per Costique’s suggestion, then this is how: (on iOS adjust as needed) In your drawRect: method… CGRect bounds = [self bounds]; CGContextRef context = UIGraphicsGetCurrentContext(); CGFloat radius = 0.5f * CGRectGetHeight(bounds); // Create the “visible” path, which will be the shape … Read more
Merely using imageWithCGImage is not sufficient. It will scale, but the result will be blurry and suboptimal whether scaling up or down. If you want to get the aliasing right and get rid of the “jaggies” you need something like this: http://vocaro.com/trevor/blog/2009/10/12/resize-a-uiimage-the-right-way/. My working test code looks something like this, which is Trevor’s solution with … Read more
If you’re curious what code is causing these logs, you can add a symbolic breakpoint on CGPostError.
A by far easier approach is to set some layer attributes of the view on initialization: self.layer.masksToBounds = NO; self.layer.shadowOffset = CGSizeMake(-15, 20); self.layer.shadowRadius = 5; self.layer.shadowOpacity = 0.5; You need to import QuartzCore. #import <QuartzCore/QuartzCore.h>