iOS-iOS8使用UIVisualEffectView实现模糊效果

拼搏现实的明天。 2023-10-17 01:22 14阅读 0赞

/*-------------------做毛玻璃效果最新方法--------------------*/
        //使用图片初始化背景色
        self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"girl.jpg"]];
        //实现模糊效果
        UIVisualEffectView *visualEffectView = [[UIVisualEffectView alloc] initWithEffect:[UIBlurEffect effectWithStyle:UIBlurEffectStyleLight]];
        visualEffectView.frame = self.view.bounds;
        //在此处alpha值越大，背景越模糊；反之alpha值越小，背景越清晰
        visualEffectView.alpha = 0.9;
        [self.view addSubview:visualEffectView];

![Center][]

再来一个带动画的效果

/*-------------------做毛玻璃效果最新方法--------------------*/
        //使用图片初始化背景色
        self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"girl.jpg"]];
        //实现模糊效果
        UIVisualEffectView *visualEffectView = [[UIVisualEffectView alloc] init];
        visualEffectView.frame = self.view.bounds;
        //在此处alpha值越大，背景越模糊；反之alpha值越小，背景越清晰
        visualEffectView.alpha = 0.9;
        [self.view addSubview:visualEffectView];
        
        UIVisualEffect *blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
        [UIView animateKeyframesWithDuration:3 delay:0 options:UIViewKeyframeAnimationOptionCalculationModeLinear animations:^{
            [visualEffectView setEffect:blurEffect];
        } completion:nil];

![Center 1][]

[Center]: https://img-blog.csdn.net/20160616131745040?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 1]: https://img-blog.csdn.net/20160616201431814?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center