iPhone - 设计我自己的 viewController 过渡

Posted 2023-02-23

【中文标题】iPhone - 设计我自己的 viewController 过渡

【英文标题】：iPhone - designing my own viewController transition

【发布时间】：2012-09-24 16:09:35

【问题描述】：

我的应用有一堆 viewController，我正在尝试设计自己的动画过渡，从一个 viewController 到另一个。

我找到了这个

- (void)transitionFromViewController:(UIViewController *)fromViewController toViewController:(UIViewController *)toViewController duration:(NSTimeInterval)duration options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion

但这似乎不允许我设计自己的过渡曲线。

我想要的是在新的 viewControllers 到达最终位置时创建像弹性弹跳这样的效果。我喜欢将自己的关键帧添加到动画曲线中。

我该怎么做？

谢谢

【参考方案1】：

如果您想设计自己的过渡，您可以为 UIViewController 创建一个类别并自己编写动画。只有基本的动画已经可用。

这就是你可以做界面的方式：

*.h 文件：

#import <UIKit/UIKit.h>

@interface UIViewController(Transitions)

- (void) presentViewController:(UIViewController *)viewController withPushDirection: (NSString *) direction;
- (void) dismissViewControllerWithPushDirection:(NSString *) direction;

@end

*.m 文件

#import "UIViewControllerWithTransitions.h"
#import <QuartzCore/QuartzCore.h>

@implementation UIViewController(Transitions)

- (void) presentViewController:(UIViewController *)viewController withPushDirection: (NSString *) direction 

    [CATransaction begin];

    CATransition *transition = [CATransition animation];
    transition.type = kCATransitionPush;
    transition.subtype = direction;
    transition.duration = 0.25f;
    transition.fillMode = kCAFillModeForwards;
    transition.removedOnCompletion = YES;

    [[UIApplication sharedApplication].keyWindow.layer addAnimation:transition forKey:@"transition"];        
    [[UIApplication sharedApplication] beginIgnoringInteractionEvents];
    [CATransaction setCompletionBlock: ^ 
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(transition.duration * NSEC_PER_SEC)), dispatch_get_main_queue(), ^ 
            [[UIApplication sharedApplication] endIgnoringInteractionEvents];        
        );
    ];

    [self presentViewController:viewController animated:NO completion:NULL];

    [CATransaction commit];



- (void) dismissViewControllerWithPushDirection:(NSString *) direction 

    [CATransaction begin];

    CATransition *transition = [CATransition animation];
    transition.type = kCATransitionPush;
    transition.subtype = direction;
    transition.duration = 0.25f;
    transition.fillMode = kCAFillModeForwards;
    transition.removedOnCompletion = YES;

    [[UIApplication sharedApplication].keyWindow.layer addAnimation:transition forKey:@"transition"];        
    [[UIApplication sharedApplication] beginIgnoringInteractionEvents];
    [CATransaction setCompletionBlock: ^ 
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(transition.duration * NSEC_PER_SEC)), dispatch_get_main_queue(), ^ 
            [[UIApplication sharedApplication] endIgnoringInteractionEvents];        
        );
    ];

    [self dismissViewControllerAnimated:NO completion:NULL];

    [CATransaction commit];



@end

这是一个示例调用：

[self presentViewController: myVC withPushDirection:@"fromRight"]; 

【讨论】：

谢谢。我已经验证它适用于关键帧动画。谢谢。

我还没有什么好的，我刚刚创建了一些简单的关键帧动画来测试这个答案是否有效。

它可以比这更容易完成，但答案是有效的。

您能否提供一个更简单的解决方案示例？