iOS实现毛玻璃效果（无需要第三方）

本文实例分享两种ios毛玻璃效果设置的方法，不需要任何第三方，先看效果：

原图：

方法一（ios8系统方法）：

方法二：

下面是示例代码：

#import "viewcontroller.h"

@interface viewcontroller ()
{
 uiimageview *_imageview;
}
@end

@implementation viewcontroller

- (void)viewdidload {
 [super viewdidload];
 _imageview = [[uiimageview alloc]initwithframe:self.view.bounds];
 _imageview.image = [uiimage imagenamed:@"1.jpg"];
 [self.view addsubview:_imageview];

 //方法一：系统方法，ios8及以上可用
 if (!uiaccessibilityisreducetransparencyenabled()) {
 uiblureffect *blureffect = [uiblureffect effectwithstyle:uiblureffectstyledark];
 uivisualeffectview *blureffectview = [[uivisualeffectview alloc]initwitheffect:blureffect];
 blureffectview.frame = _imageview.bounds;
 [_imageview addsubview:blureffectview];
 }


 //方法二：core image
 uiimageview *blurimageview = [[uiimageview alloc]initwithframe:_imageview.bounds];
 blurimageview.image = [self blur:[uiimage imagenamed:@"1.jpg"]];
 [_imageview addsubview:blurimageview];
}

//生成一张毛玻璃图片
- (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;
}

- (void)didreceivememorywarning {
 [super didreceivememorywarning];
 // dispose of any resources that can be recreated.
}

@end

具体效果和参数自行研究吧！

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。

原文链接：https://blog.csdn.net/yibaozhifu/article/details/50850844