废话不多说，实现简单的高斯模糊的效果代码：
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UIView *bgview= [[UIViewalloc]initWithFrame:self.view.frame];
// bgview.backgroundColor = [UIColor blackColor];
// bgview.alpha = 0.9;
bgview.tag =10086;
[self.viewaddSubview:bgview];
UIBlurEffect *blur = [UIBlurEffecteffectWithStyle:UIBlurEffectStyleLight];
UIVisualEffectView *effectview = [[UIVisualEffectViewalloc] initWithEffect:blur];
effectview.frame =self.view.frame;
[bgview addSubview:effectview];
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这写代码只是简单的实现高斯模糊。关于消除，把它remove就行了。
关于图片的高斯模糊，首先拿到图片：
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CIContext *context = [CIContext contextWithOptions:nil];
CIImage *inputImage = [[CIImage alloc] initWithImage:[UIImage imageNamed:@"1.png"]];
// create gaussian blur filter
CIFilter *filter = [CIFilter filterWithName:@"CIGaussianBlur"];
[filter setValue:inputImage forKey:kCIInputImageKey];
[filter setValue:[NSNumber numberWithFloat:10.0] forKey:@"inputRadius"];
// blur image
CIImage *result = [filter valueForKey:kCIOutputImageKey];
CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
UIImage *image = [UIImage imageWithCGImage:cgImage];
CGImageRelease(cgImage);
self.mainImageView.image = image;
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以上所述是小编给大家介绍的iOS实现背景高斯模糊效果，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！
原文链接：http://blog.csdn.net/requestnslog/article/details/53609690