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UINavigationController 上视图之间的过渡动画有多长？

发布于 2024-12-07 03:09:44 字数 77 浏览 0 评论 0原文

理想情况下，应该有某种包含该值的常量。

我正在实现具有自己的过渡动画的代码，并且我希望这些代码具有与平台过渡动画相同的长度。

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凉城 2024-12-14 03:09:44

在 iOS 7 及更高版本中，您可以通过设置 UINavigationController 委托并使用以下方法获得准确的值：

- (void)navigationController:(UINavigationController *)navigationController
      willShowViewController:(UIViewController *)viewController
                    animated:(BOOL)animated {
    NSTimeInterval duration = [viewController.transitionCoordinator transitionDuration];
}

如果默认持续时间发生变化，这是面向未来的方法。目前它的值为 0.35 秒。

In iOS 7 and later you can have exact value by setting the UINavigationController delegate and using the method:

- (void)navigationController:(UINavigationController *)navigationController
      willShowViewController:(UIViewController *)viewController
                    animated:(BOOL)animated {
    NSTimeInterval duration = [viewController.transitionCoordinator transitionDuration];
}

This is future proof method if the defult duration will ever change. At the moment it's value is 0.35 second.

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客…行舟 2024-12-14 03:09:44

没有包含该值的常量。但是，使用以下 UINavigationControllerDelegate 方法：

- (void) navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    startTime = [[NSDate date] retain];
}

- (void) navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    NSLog(@"Duration %f", [[NSDate date] timeIntervalSinceDate: startTime]);
}

... 我可以看到持续时间约为 0.35 秒

有趣的是，视图的不同部分需要不同的时间才能过渡到位。有关更多详细信息，请参阅这篇精彩的博客文章：

http:// www.iclarified.com/12396/a-closer-look-at-iphone-transition-animations

There's no constant containing this value. However, using the following UINavigationControllerDelegate methods:

- (void) navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    startTime = [[NSDate date] retain];
}

- (void) navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    NSLog(@"Duration %f", [[NSDate date] timeIntervalSinceDate: startTime]);
}

... I can see that the duration is approx 0.35 seconds

Interestingly, different parts of the views take different times to transition into place. See this great blog post for more details:

http://www.iclarified.com/12396/a-closer-look-at-iphone-transition-animations

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