UIVisualEffectView创建一个灰色框而不是模糊 [英] UIVisualEffectView creates a grey box instead of blurring

问题描述

我正在使用UIVisualEffectView来模糊SpriteKit中的屏幕区域，如下所示:

I'm using a UIVisualEffectView to blur a section of the screen in SpriteKit like so:

let blur:UIBlurEffect = UIBlurEffect(style: UIBlurEffectStyle.Dark)
let UIEffectView:UIVisualEffectView = UIVisualEffectView(effect: blur)
UIEffectView.frame = CGRectMake(0, 0, frame.width, frame.height * 0.15)
self.view?.addSubview(UIEffectView)

但是它显示为灰色阴影区域而不是模糊区域.奇怪的是，它模糊了，而GameCenter通知却在开始时显示，说欢迎回来，(玩家)"，但是一旦通知消失，它就会变成一个灰色框.

But it appears as a grey shaded area instead of a blur. Strangely, it blurs whilst the GameCenter notification shows at the start, saying "Welcome back, (player)" - but once the notification disappears, it goes back to being a grey box.

同样适用于在iOS9中进入多任务视图时，预览区域模糊，但是在进入应用程序时，它又恢复为灰色阴影区域.

Same applies to when you go into the multi-task view in iOS9, the preview has the section blurred, but when you go into the app, it reverts to being a grey shaded area again.

有什么想法为什么会这样?在模拟器和物理硬件中，它的作用相同.

Any ideas why this is happening? It does the same in the simulators as well as physical hardware.

推荐答案

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I had the same headache before use UIVisualEffectView to create a blur view, correct on simulator but not on iphone & ipad, it turns out weird stuff can happen when you mess UIKit together with SpriteKit. I would suggest use SKEffectNode to do the blur job, instead of UIVisualEffectView.

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