iOS毛玻璃效果（不需要任何第三方的东东）

来源：互联网发布：瓜子二手车知乎编辑：程序博客网时间：2024/06/08 15:07

分享两种毛玻璃效果设置的方法，不需要任何三方东东，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！

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