You might be able to modify something like Bin Zhang’s RWBlurPopover to do this. That component uses my GPUImage to apply a Gaussian blur to components underneath it, but you could just as easily use a CIGaussianBlur for the same. GPUImage might be a hair faster though. That component relies on you being able to … Read more
You need to wrap the CG structures in NSValue classes. So: NSMutableArray* array = [NSMutableArray mutableArray]; [array addObject:[NSValue valueWithCGRect:CGRectMake(0,0,10,10)]]; CGRect someRect = [[array objectAtIndex:0] CGRectValue];
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; }
You can use CGContextSetFillColorWithColor and CGContextFillRect for this: Swift extension UIImage { class func image(with color: UIColor) -> UIImage { let rect = CGRectMake(0.0, 0.0, 1.0, 1.0) UIGraphicsBeginImageContext(rect.size) let context = UIGraphicsGetCurrentContext() CGContextSetFillColorWithColor(context, color.CGColor) CGContextFillRect(context, rect) let image = UIGraphicsGetImageFromCurrentImageContext() UIGraphicsEndImageContext() return image } } Swift3 extension UIImage { class func image(with color: UIColor) -> … Read more
Here’s how to apply all 6 Sketch shadow properties to a UIView’s layer with near perfect accuracy: extension CALayer { func applySketchShadow( color: UIColor = .black, alpha: Float = 0.5, x: CGFloat = 0, y: CGFloat = 2, blur: CGFloat = 4, spread: CGFloat = 0) { masksToBounds = false shadowColor = color.cgColor shadowOpacity = … Read more
Stick to UIKit and subviews whenever you can. You can be more productive, and take advantage of all the OO mechanisms that should things easier to maintain. Use Core Graphics when you can’t get the performance you need out of UIKit, or you know trying to hack together drawing effects in UIKit would be more … Read more
– (UIColor *)lighterColorForColor:(UIColor *)c { CGFloat r, g, b, a; if ([c getRed:&r green:&g blue:&b alpha:&a]) return [UIColor colorWithRed:MIN(r + 0.2, 1.0) green:MIN(g + 0.2, 1.0) blue:MIN(b + 0.2, 1.0) alpha:a]; return nil; } – (UIColor *)darkerColorForColor:(UIColor *)c { CGFloat r, g, b, a; if ([c getRed:&r green:&g blue:&b alpha:&a]) return [UIColor colorWithRed:MAX(r – 0.2, … Read more
I believe the easiest way (and thread safe too) is to do: //assume that the image is loaded in landscape mode from disk UIImage * landscapeImage = [UIImage imageNamed:imgname]; UIImage * portraitImage = [[UIImage alloc] initWithCGImage: landscapeImage.CGImage scale: 1.0 orientation: UIImageOrientationRight]; Note: As Brainware said this only modifies the orientation data of the image – … 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
Sometimes it is really useful to spend some time reinventing the wheel. As you might have already noticed there are a lot of frameworks, but it is not that hard to implement a simple, but yet useful solution without introducing all that complexity. (Please don’t get me wrong, for any serious purpose it is better … Read more