动画UINavigationController的“后退”按钮 [英] Animating UINavigationController's 'back' button
问题描述
我在导航控制器的层次结构中的视图控制器上有一个自定义按钮，当按下该按钮时，会弹出可见的视图控制器。
I have a custom button on a view controller in the navigation controller's heirarchy, that when pressed, pops the visible view controller.
我想使用UIView的转换属性来设置视图控制器的关闭动画。它可以工作，但如果我使用`popViewControllerAnimated：YES'，动画的默认左侧幻灯片仍然存在，尽管我的自定义转换也可以。
I want to use UIView's transform property to animate the closing of the view controller. It works, but if I use `popViewControllerAnimated:YES', the default left slide of the animation is still there, though my custom transform also works.
如果我设置 popViewControllerAnimated：NO 它根本不动画任何内容。
If I set popViewControllerAnimated:NO it doesn't animate anything at all.
我还研究过使用 CATransition 当我有 popViewControllerAnimated 设置为否，但没有缩放效果是公共API的一部分，我不想使用私有效果。自定义过滤器也不适用于iPhone，仅适用于OS X.
I also looked into using CATransition which works when I have popViewControllerAnimated set to NO, but there isn't a "zoom" effect that's part of the public API, and I don't want to use the private effect. Custom filters are also not available for iPhone, only OS X.
所以我想我的问题是：
1）有没有办法在默认转换中删除左侧幻灯片，但仍然使用转换进行自定义动画？
1) Is there a way to remove the the left slide in the default transition yet still have a custom animation using transform?
2）使用自定义过滤器的一些方法 CATransition ？
2) Some way to use a custom filter for CATransition?
3）如果我使用私有用于缩放效果的API有多大可能让Apple在拒收箱中丢弃我的应用程序？
3) If I use a private API for the zoom effect how likely will Apple toss my app in the rejection bin?
有没有人有我忽略的解决方案？
Does anyone have a solution I'm overlooking?
推荐答案
我做了类似你所描述的事情，即在UINavigationController中更改pop和push of view的默认动画。
I've done something similar to what you describe, i.e. change the default animation for pop and push of view in UINavigationController.
这个想法是禁用对象的默认动画并用你自己的动画替换它。我为UINavigationController创建了一个新类别，并使用了类似下面的函数。
The idea is to disable the default animation for the object and replace it with your own animation. I've created a new category for UINavigationController and used a function similar to the one below.
- (void) altAnimatePopViewControllerAnimated:(BOOL)animated
{
[CATransaction begin];
CATransition *transition;
transition = [CATransition animation];
transition.type = kCATransitionPush; // Use any animation type and subtype you like
transition.subtype = kCATransitionFromTop;
transition.duration = 0.3;
CATransition *fadeTrans = [CATransition animation];
fadeTrans.type = kCATransitionFade;
fadeTrans.duration = 0.3;
[CATransaction setValue:(id)kCFBooleanTrue
forKey:kCATransactionDisableActions];
[[[[self.view subviews] objectAtIndex:0] layer] addAnimation:transition forKey:nil];
[[[[self.view subviews] objectAtIndex:1] layer] addAnimation:fadeTrans forKey:nil];
[self popViewControllerAnimated:YES];
[CATransaction commit];
}
使用代码
[self.navigationController altAnimatePopViewControllerAnimated:YES];
为了进行推送，只需创建另一个类似的功能并反转动画。
In order to do a push just create another similar function and reverse the animation.
它并不完美，但它有效。当您选择不同的动画类型时，可以使用构成导航栏/控制器的不同子视图来完美地使用它。
It's not perfect but it works. When you choose different animation types play around with the different subviews composing the navigation bar/controller to get it perfect.
拿出我的白色来想出这个，所以明智地使用它：）
Took my quite a white to come up with this, so use it wisely :)
*******编辑
尝试用此替换推送转换（我自己没试过）：
Try replacing the push transition with this (Didn't try it myself):
CAKeyframeAnimation *scale = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale"];
scale.duration = duration;
scale.values = [NSArray arrayWithObjects:[NSNumber numberWithFloat:.5f],
[NSNumber numberWithFloat:1.2f],
[NSNumber numberWithFloat:.85f],
[NSNumber numberWithFloat:1.f],
nil];
这会弹出一个，即视图在结算到合适大小之前会更大。使用数组中的值来控制动画的曲线。
This will do a pop in, i.e. the view will be bigger before it settles to the right size. Play with the values in the array to control the curve of the animation.
这篇关于动画UINavigationController的“后退”按钮的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
