OC

OC

UIBlurEffect

UIBlurEffect iOS 8以后的，生成毛玻璃效果 代码.

   UIBlurEffect *effect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleDark];UIVisualEffectView *effectView = [[UIVisualEffectView alloc] initWithEffect:effect];effectView.frame = CGRectMake(0, 0, CGRectGetMaxX(img2.frame)/2, 210);[img2 addSubview:effectView];

生成一张毛玻璃图片

生成一张毛玻璃的图片 代码.

- (UIImage*)blur:(UIImage*)theImage
{CIContext *context = [CIContext contextWithOptions:nil];CIImage *inputImage = [CIImage imageWithCGImage:theImage.CGImage];CIFilter *filter = [CIFilter filterWithName:@"CIGaussianBlur"];[filter setValue:inputImage forKey:kCIInputImageKey];[filter setValue:[NSNumber numberWithFloat:15.0f] forKey:@"inputRadius"];CIImage *result = [filter valueForKey:kCIOutputImageKey];CGImageRef cgImage = [context createCGImage:result fromRect:[inputImage extent]];UIImage *returnImage = [UIImage imageWithCGImage:cgImage];CGImageRelease(cgImage);return returnImage;
};