我正在使用以下代码对我加载的图像执行一些操作,但我发现当它在视网膜显示器上时显示变得模糊
- (UIImage*)createImageSection:(UIImage*)image section:(CGRect)section
{
float originalWidth = image.size.width ;
float originalHeight = image.size.height ;
int w = originalWidth * section.size.width;
int h = originalHeight * section.size.height;
CGContextRef ctx = CGBitmapContextCreate(nil, w, h, 8, w * 8,CGImageGetColorSpace([image CGImage]), kCGImageAlphaPremultipliedLast);
CGContextClearRect(ctx, CGRectMake(0, 0, originalWidth * section.size.width, originalHeight * section.size.height)); // w + h before
CGContextTranslateCTM(ctx, (float)-originalWidth * section.origin.x, (float)-originalHeight * section.origin.y);
CGContextDrawImage(ctx, CGRectMake(0, 0, originalWidth, originalHeight), [image CGImage]);
CGImageRef cgImage = CGBitmapContextCreateImage(ctx);
UIImage* resultImage = [[UIImage alloc] initWithCGImage:cgImage];
CGContextRelease(ctx);
CGImageRelease(cgImage);
return resultImage;
}
我如何更改它以使其与视网膜兼容。
在此先感谢您的帮助
最佳,DV