X $ C $Ç - UIVisualEffectView动画 [英] xCode - UIVisualEffectView animating

问题描述

我有一个问题，而动画效果VisualEffetView。
这里是code，其中我宣布它。

I've an issue while animating a VisualEffetView. Here is the code where I declare it.

UIBlurEffect* blur = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
effectView = [[UIVisualEffectView alloc] initWithEffect:blur];
effectView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
effectView.frame = self.bounds;
self.layer.borderWidth = 1;
[self addSubview:effectView];

在我的动画向上海华让它成长，在视觉效果上遵循上海华的动画，但是当我想减少它，视觉效果瞬间消失​​使结果非常难看^^
这里是code，我的动画的SuperView（这里叫做RECHERCHE）

When I animate the superview to make it grow, the Visual Effect follow the animation of the superview, but when I want to reduce it, the Visual Effect disappear instantly making the result very ugly ^^ Here is the code where I animate the superview (called recherche here)

[UIView animateWithDuration:0.3f
                          delay:0.0f
                        options:UIViewAnimationOptionTransitionNone
                     animations:^{
                         CGRect f = recherche.frame;
                         f.size.height = 0;
                         [recherche setFrame:f];
                     }
                     completion:^(BOOL finished){
                         [recherche removeFromSuperview];
                         recherche = nil;
                     }];

下面是我，当我做RECHERCHE消失。白方似乎是效果图，因为如果我改变UIBlurEffectStyle的颜色变化。但模糊效果缺少X）

Here is what I have when I make recherche disappear. The white square seems to be the Effect View because the color changes if I change the UIBlurEffectStyle. But blurring effect is missing x)

推荐答案

从上述认识，我弄清楚，你只需要重置效应鉴于高度达到你想要的东西。

From above understanding, I figure out that you just need to reset height of effect view to achieve what you want.

加code在动画块：

检查，让我知道，这是完全填补你的期望。

Check and let me know, is it full fill your expectation.

[UIView animateWithDuration:0.3f
                      delay:0.0f
                    options:UIViewAnimationOptionTransitionNone
                 animations:^{
     CGRect f = recherche.frame;
     f.size.height = 0;
     [recherche setFrame:f];

     // Add this lines
     CGRect effectViewFrame = effectView.frame;
     effectView.size.height = 0;
     effectView.frame = effectViewFrame;

 }
 completion:^(BOOL finished){
     [recherche removeFromSuperview];
     recherche = nil;
 }];

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