iOS开发-高斯模糊

#import "ViewController.h"

@interface ViewController ()

@property (nonatomic,strong) UIImageView *imageView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.navigationController.navigationBarHidden = YES;
    [self.view addSubview:self.imageView];
    
    //创建需要的毛玻璃特效类型
    UIBlurEffect *blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleDark];
    //毛玻璃view 视图
    UIVisualEffectView *effectView = [[UIVisualEffectView alloc] initWithEffect:blurEffect];
    //添加到要有毛玻璃特效的控件中
    effectView.frame = self.imageView.bounds;
    //设置模糊透明度
    effectView.alpha = 0.8f;
    [self.imageView addSubview:effectView];
}

///创建UIImageView
- (UIImageView *)imageView {
    if (!_imageView) {
        _imageView = [[UIImageView alloc] init];
        _imageView.frame = self.view.bounds;
        _imageView.contentMode = UIViewContentModeScaleAspectFit;
        _imageView.backgroundColor = [[UIColor redColor] colorWithAlphaComponent:0.1];
        _imageView.image = [UIImage imageNamed:@"pic2.jpeg"];
    }
    return _imageView;
}

@end