#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]; / / create need frosted glass special type UIBlurEffect * blurEffect = [UIBlurEffect effectWithStyle: UIBlurEffectStyleDark]; / / frosted glass view UIVisualEffectView * effectView = [[UIVisualEffectView alloc] initWithEffect: blurEffect]; Effectview.frame = self.imageview.bounds; Effectview. alpha = 0.8f; [self.imageView addSubview:effectView]; } 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; } @endCopy the code