相关疑难解决方法(0)

我有一个侧面导航控制器,并通过UIButton呈现它.当我直接将这个NC作为根视图控制器时[self presentviewcontroller: NC animated: YES completion: nil],某些原因NC的菜单面被一个UITransitionView我无法消失的东西阻挡.

我附上了一张照片 . 是另一个.

我尝试过以下方法:

UIWindow *window = [(AppDelegate *)[[UIApplication sharedApplication] delegate] window];
    window.backgroundColor = kmain;


    CATransition* transition = [CATransition animation];
    transition.duration = .5;
    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    transition.type = kCATransitionPush;
    transition.subtype = kCATransitionFromTop;

    [nc.view.layer addAnimation:transition forKey:kCATransition];

    [UIView transitionWithView:window
                      duration:0.5
                       options:UIViewAnimationOptionTransitionNone
                    animations:^{ window.rootViewController = nc; }
                    completion:^(BOOL finished) {
                        for (UIView *subview in window.subviews) {
                            if ([subview isKindOfClass:NSClassFromString(@"UITransitionView")]) {
                                [subview removeFromSuperview];
                            }
                        }
                    }];

但它非常hacky,并且随着窗口的rootviewcontroller在转换过程中发生变化,它会有点波动,导航控制器的一部分和右上角变黑.看起来很糟糕.

我有一个从底部UIViewController只UIView覆盖viewController的1/3.像这样

我想在另一个ViewController上呈现这个viewController.它应该从底部动画出现,它应该忽略到底部动画.

但我不希望它覆盖整个屏幕.显示它的viewController应该在后面可见.

这似乎是一个基本问题但我无法完成它.有人可以指点我的方向吗？

编辑:

这就是我迄今为止所尝试过的.我创建了这些类

// MARK: -

class MyFadeInFadeOutTransitioning: NSObject, UIViewControllerTransitioningDelegate {
var backgroundColorAlpha: CGFloat = 0.5
var shoulDismiss = false

func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {

    let fadeInPresentAnimationController = MyFadeInPresentAnimationController()
        fadeInPresentAnimationController.backgroundColorAlpha = backgroundColorAlpha

    return fadeInPresentAnimationController
}

func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {

    let fadeOutDismissAnimationController = MyFadeOutDismissAnimationController()

    return fadeOutDismissAnimationController
}

}

// MARK: -

class MYFadeInPresentAnimationController: NSObject, UIViewControllerAnimatedTransitioning {

let kPresentationDuration = 0.5
var backgroundColorAlpha: CGFloat?

func transitionDuration(using …

问题

不调用'DrinkTransitioningDelegate'中的委托函数.'td'实例在演示文稿的生命周期内和之外保留在内存中.

class PresentingViewController: UIViewController {

    let td = DrinkTransitioningDelegate()

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let item = inventory.beverages[indexPath.row]
        item.isSelected = true
        let controller = DrinkViewController(item: item)
        controller.delegate = self
        controller.transitioningDelegate = td
        controller.modalPresentationStyle = .custom
        //let navCon = UINavigationController(rootViewController: controller)
        //navCon.transitioningDelegate = td
        //navCon.modalPresentationStyle = .custom
        present(controller, animated: true)
    }

}

class DrinkTransitioningDelegate: NSObject, UIViewControllerTransitioningDelegate {

    func presentationControllerForPresentedViewController(presented: UIViewController, presentingViewController presenting: UIViewController!, sourceViewController source: UIViewController) -> UIPresentationController? {
        return DrinkPresentationViewController(presentedViewController:presented, presenting: presenting)
    }

    let animationController = …

我想要 pageSheet UIModalPresentationStyle segue 的所有功能，但我只希望呈现的 ViewController 显示一半屏幕（请参见下图中的示例）。

我使用 pageSheet modalPresentationStyle 以模态方式呈现它，但它始终以 100% 高度呈现。

我一直无法弄清楚如何限制或修改 ViewController 的高度。我在 SecondViewController 中尝试了以下操作，但没有成功：

import UIKit

class SecondViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        self.preferredContentSize = CGSize(width: self.view.frame.width, height: 400)
    }
} 

我正在使用 Storyboard Segues 和一个以模态方式呈现它的按钮来启动 Segue：

我有一个视图,我想显示一个自定义大小的UIViewController.但我没有成功.这是我的代码.

var vx = KeyboardViewController()
vx.modalPresentationStyle = UIModalPresentationStyle.FormSheet
vx.preferredContentSize = CGSizeMake(self.view.frame.width, 150)    
self.presentViewController(vx, animated: true, completion: nil)

此UIViewController以全屏大小显示