切换后换上高斯模糊
iOS
@property (nonatomic, strong) UIVisualEffectView *backView;
- (void)applicationWillResignActive:(UIApplication *)application {
UIBlurEffect *beffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
backView = [[UIVisualEffectView alloc] initWithEffect:beffect];
backView.frame = [self.window frame];
[self.window addSubview:backView];
}
- (void)applicationDidBecomeActive:(UIApplication *)application {
if (backView != nil) {
[backView removeFromSuperview];
backView = nil;
}
}
