2

我正在使用 UIViewController 并且我使用 presentModalViewController:controllerr animated:YES 来呈现它，但我想它是否会从屏幕顶部向下滑动而不是从底部向上滑动，有什么办法吗？

4

5 回答 5

7

我创建了一个ViewControllers从所有 4 个方向推送的函数：

- (void) slideLayerInDirection:(NSString *)direction andPush:(UIViewController *)dstVC {
  CATransition* transition = [CATransition animation];
  transition.duration = 0.5;
  transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
  transition.type = kCATransitionPush;
  transition.subtype = direction;
  [self.view.layer addAnimation:transition forKey:kCATransition];
  [self pushViewController:dstVC animated:NO];
}

头文件包含以下内容：

#import <QuartzCore/QuartzCore.h>

#define direction_left kCATransitionFromLeft
#define direction_top kCATransitionFromBottom
#define direction_right kCATransitionFromRight
#define direction_bottom kCATransitionFromTop
于 2013-02-06T15:29:30.767 回答
5 
public extension UINavigationController {

    func pushViewControllerFromTop(viewController vc: UIViewController) {
        vc.view.alpha = 0
        self.present(vc, animated: false) { () -> Void in
            vc.view.frame = CGRect(x: 0, y: -vc.view.frame.height, width: vc.view.frame.width, height: vc.view.frame.height)
            vc.view.alpha = 1
            UIView.animate(withDuration: 1, 
                           animations: { () -> Void in
                               vc.view.frame = CGRect(x: 0, y: 0, width: vc.view.frame.width, height: vc.view.frame.height)
                           }, 
                           completion: nil)
        }
    }

    func dismissViewControllerToTop() {
        if let vc = self.presentedViewController {
            UIView.animate(withDuration: 1, 
                           animations: { () -> Void in
                               vc.view.frame = CGRect(x: 0, y: -vc.view.frame.height, width: vc.view.frame.width, height: vc.view.frame.height)
                           }, 
                           completion: { complete -> Void in
                               if complete {
                                   self.dismiss(animated: false, completion: nil)
                               }
                           })
        }
    }
}
于 2016-03-09T02:19:40.180 回答
3

我使用以下代码从顶部为 viewController 设置动画。

[self.mainViewController.view addSubview:modalViewController.view];
modalViewController.view.frame = CGRectMake(modalViewController.view.frame.origin.x,
                                            -modalViewController.view.frame.size.height,
                                            modalViewController.view.frame.size.width,
                                            modalViewController.view.frame.size.height);

[UIView animateWithDuration:0.4 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^(void){

    modalViewController.view.frame = CGRectMake(modalViewController.view.frame.origin.x,
                                                0,
                                                modalViewController.view.frame.size.width,
                                                modalViewController.view.frame.size.height);

} completion:^(BOOL finished){

    [modalViewController.view removeFromSuperview];
    [self.mainViewController presentViewController:modalViewController animated:NO completion:nil];

}];

它将 的 添加到中UIView，对其进行动画处理，然后从 中删除并且没有动画。modalViewControllermainViewControllerUIViewmainViewControllerpresentsViewController:

于 2014-03-25T10:13:20.050 回答
0

您所描述的不是内置的过渡样式；有关 Apple 提供的列表，请参见此处。如果你绝对需要你的视图控制器以这种方式出现，你必须自己制作动画。

于 2011-08-31T23:44:10.240 回答
0

您必须#import在QuartzCore框架中添加过渡动画，然后更改：

animated:YES 至： animated:NO。

于 2013-02-06T15:33:53.283 回答