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]; |
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; |
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
