Ios UIViewAnimationOption枚举覆盖垂直

我想推送一个带有自定义模态动画的ViewController。我更喜欢使用“封面垂直”动画。“封面垂直”是否有

ui视图动画选项

---

将中的UIViewAnimationOptionCurveEaseIn替换为？或者有更好的方法吗？

您需要使用动画控制器。设置此设置的代码如下所示：

- (id)animationControllerForPresentedController:(UIViewController *)presented presentingController:(UIViewController *)presenting sourceController (UIViewController *)source
{
    return self.animationController;
}

- (id )animationControllerForDismissedController:(UIViewController *)dismissed {
     self.animationController.isPresenting = NO;

    return self.animationController;
}

然后，您需要使用以下方法确定您是在陈述还是拒绝：

-(void)animateTransition:(id)transitionContext{

if(self.isPresenting){
    [self executePresentationAnimation:transitionContext];
}
else{
    [self executeDismissalAnimation:transitionContext];
}

}

最后，定义动画后，以下代码将从顶部将视图作为模式视图推入：

-(void)executePresentationAnimation:(id)transitionContext{

UIView* inView = [transitionContext containerView];

UIViewController* toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];

[inView addSubview:toViewController.view];

CGPoint centerOffScreen = inView.center;

centerOffScreen.y = (-1)*inView.frame.size.height;
toViewController.view.center = centerOffScreen;

[UIView animateWithDuration:self.presentationDuration delay:0.0f usingSpringWithDamping:0.4f initialSpringVelocity:6.0f options:UIViewAnimationOptionCurveEaseIn animations:^{

    toViewController.view.center = inView.center;

} completion:^(BOOL finished) {

    [transitionContext completeTransition:YES];
}];
}

当你放弃时，相反的情况会发生：

-(void)executeDismissalAnimation:(id)transitionContext{

UIView* inView = [transitionContext containerView];

UIViewController* toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];

UIViewController* fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];

[inView insertSubview:toViewController.view belowSubview:fromViewController.view];

CGPoint centerOffScreen = inView.center;
centerOffScreen.y = (-1)*inView.frame.size.height;

[UIView animateKeyframesWithDuration:self.dismissalDuration delay:0.0f options:UIViewKeyframeAnimationOptionCalculationModeLinear animations:^{

    [UIView addKeyframeWithRelativeStartTime:0 relativeDuration:0.5 animations:^{

        CGPoint center = fromViewController.view.center;
        center.y += 50;
        fromViewController.view.center = center;
    }];

    [UIView addKeyframeWithRelativeStartTime:0.5 relativeDuration:0.5 animations:^{

        fromViewController.view.center = centerOffScreen;

    }];


} completion:^(BOOL finished) {
    [transitionContext completeTransition:YES];
}];
}

-(void)executeDismissalAnimation:(id)transitionContext{

UIView* inView = [transitionContext containerView];

UIViewController* toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];

UIViewController* fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];

[inView insertSubview:toViewController.view belowSubview:fromViewController.view];

CGPoint centerOffScreen = inView.center;
centerOffScreen.y = (-1)*inView.frame.size.height;

[UIView animateKeyframesWithDuration:self.dismissalDuration delay:0.0f options:UIViewKeyframeAnimationOptionCalculationModeLinear animations:^{

    [UIView addKeyframeWithRelativeStartTime:0 relativeDuration:0.5 animations:^{

        CGPoint center = fromViewController.view.center;
        center.y += 50;
        fromViewController.view.center = center;
    }];

    [UIView addKeyframeWithRelativeStartTime:0.5 relativeDuration:0.5 animations:^{

        fromViewController.view.center = centerOffScreen;

    }];


} completion:^(BOOL finished) {
    [transitionContext completeTransition:YES];
}];
}