UIImage *image = [UIImage imageNamed:@"1234.jpeg"];
self.view.backgroundColor = [UIColor colorWithPatternImage:image];
// 先创建一个毛玻璃效果
UIBlurEffect *effect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
// 创建一个毛玻璃视图,指定效果
UIVisualEffectView *effectView = [[UIVisualEffectView alloc] initWithEffect:effect];
effectView.frame = self.view.frame;
[self.view addSubview:effectView];