UIImage with rounded corners

Question

I have read several posts already. And almost everyone suggest using QuartzCore/QuartzCore.h with layer.cornerRadius

I have tried this method and some more methods.

Well, everything works fine when an image doesn't move.

But in my project I always move my images. If I add corner radius or a shadow the image movement is no longer smooth. And it looks aweful!

That is the way I resize my image:

CGSize newSize = CGSizeMake(200*height/image.size.height, 280); CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); CGContextRef context = CGBitmapContextCreate(nil, newSize.width, newSize.height, 8, 0, colorSpace, kCGImageAlphaPremultipliedLast); CGContextClearRect(context, CGRectMake(0, 0, newSize.width, newSize.height)); CGContextDrawImage(context, CGRectMake(0, 0, newSize.width, newSize.height), image.CGImage); CGImageRef scaledImage = CGBitmapContextCreateImage(context); CGColorSpaceRelease(colorSpace); CGContextRelease(context); UIImage *newImage = [UIImage imageWithCGImage: scaledImage]; CGImageRelease(scaledImage); 

I would like to know a good way to resize my image, add shadow, corner radius and still have smooth movement of my image.

Answer 1

// Get your image somehow UIImage *image = [UIImage imageNamed:@"image.jpg"];  // Begin a new image that will be the new image with the rounded corners  // (here with the size of an UIImageView)  UIGraphicsBeginImageContextWithOptions(imageView.bounds.size, NO, [UIScreen mainScreen].scale);   // Add a clip before drawing anything, in the shape of an rounded rect   [[UIBezierPath bezierPathWithRoundedRect:imageView.bounds                          cornerRadius:10.0] addClip];  // Draw your image [image drawInRect:imageView.bounds];   // Get the image, here setting the UIImageView image   imageView.image = UIGraphicsGetImageFromCurrentImageContext();   // Lets forget about that we were drawing   UIGraphicsEndImageContext(); 

Try moving with this code, as far as I can remember I used this a while back that makes an image with rounded corners that you can move around into the targets. But it seemed to scale fine...