iOS - 创建自定义过渡动画

Posted 2023-03-12

【中文标题】iOS - 创建自定义过渡动画

【英文标题】：iOS - Creating a custom Transition animation

【发布时间】：2015-04-11 22:03:33

【问题描述】：

我正在尝试在视图控制器之间创建自定义转换，这些控制器使用自定义 segues 链接到容器视图控制器。

这是我创建自定义过渡的尝试。然而，所发生的是视图按预期上下动画。但是视图控制器会立即切换。我要创建的是视图垂直滑出屏幕，然后容器切换视图控制器，然后它滑回屏幕。

任何想法如何使用自定义动画来实现此动画？

- (void)swapFromViewController:(UIViewController *)fromViewController toViewController:(UIViewController *)toViewController

    toViewController.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
    [fromViewController willMoveToParentViewController:nil];
    [self addChildViewController:toViewController];



    [self transitionFromViewController:fromViewController toViewController:toViewController duration:.4 options:UIViewAnimationOptionCurveEaseOut animations:^
        self.view.frame = CGRectMake(0, 560, self.view.frame.size.width, self.view.frame.size.height);
     completion:^(BOOL finished) 
        [UIView animateWithDuration:.4 delay:0 options:UIViewAnimationOptionCurveLinear animations:^
            self.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
         completion:^(BOOL finished) 
            [fromViewController removeFromParentViewController];
            [toViewController didMoveToParentViewController:self];
        ];
    ];

【参考方案1】：

[UIViewController transitionFromViewController:toViewController] 仅在 fromViewController 和 toViewController 都已经是接收器的子控制器时有效。

---

transitionFromViewController:toViewController: 的文档说明如下：

视图控制器的两个子视图控制器之间的转换。

fromViewController：一个视图控制器，其视图当前在父视图层次结构中可见。

toViewController：其视图当前不在视图层次结构中的子视图控制器。

---

但是我没有测试它，我认为这会起作用：

- (void)swapFromViewController:(UIViewController *)fromViewController toViewController:(UIViewController *)toViewController

    CGFloat width = CGRectGetWidth(self.view.frame);
    CGFloat height = CGRectGetHeight(self.view.frame);

    [fromViewController willMoveToParentViewController:nil];
    [self addChildViewController:toViewController];

    toViewController.view.frame = CGRectMake(0.0, height, width, height);
    [self.view addSubView:toViewController.view];

    [UIView transitionWithView:self.view
                  duration:0.4
                   options:UIViewAnimationOptionCurveLinear
                animations:^
                    fromViewController.view.frame = CGRectMake(0.0, height, width, height);
                    toViewController.view.frame = CGRectMake(0.0, 0.0, width, height);
                
                completion:^(BOOL finished) 
                    [fromViewController removeFromParentViewController];
                    [fromViewController.view removeFromSuperView];
                    [toViewController didMoveToParentViewController:self];
                ];