问题描述
自iOS 7以来，我注意到我的UIAlertViews显示有某种绘制延迟-发生的是屏幕变暗，UIAlertView的文本在屏幕上仅显示了一秒钟，然后才显示警报视图的实际帧.
Ever since iOS 7, I noticed my UIAlertViews show with a sort of drawing delay- what happens is the screen dims and the UIAlertView's text appears on the screen for just a split second before the actual frame of the alert view appears.
我将问题归结为是由于我的应用程序plist文件中的具有边缘抗锯齿效果的渲染"标志设置为YES所致.禁用此功能可以解决此问题(但是，在所有旋转的视图上我都遇到了锯齿状的锯齿，这是我最初使用该标志解决的问题).
I traced the problem to being due to the "Renders with edge antialiasing" flag set to YES in my application plist file. Turning this off solves the problem (but then I have ugly jaggies on any rotated views, which is what I was using that flag to solve in the first place).
有人知道我也可以吃蛋糕吗?即具有边缘抗锯齿功能和平滑的UIAlertViews.
Anyone know how I can have my cake and eat it too? i.e. have edge antialiasing as well as smooth UIAlertViews.
在较高的层次上，似乎能够即时切换'UIViewEdgeAntialiasing'都能做到.或者，如果有一种方法可以直接使用抗锯齿旋转UIViews.这两种可能吗?
On a high level, it seems as though either being able to toggle 'UIViewEdgeAntialiasing' on the fly would do it. Or if there is a way to rotate UIViews with antialiasing directly. Are either of these possible?
推荐答案
带有边缘抗锯齿的渲染"非常昂贵！请谨慎使用.
"Renders with edge antialiasing" is very expensive! Use with caution.
使用此小技巧:
view.layer.borderWidth = 1;
view.layer.borderColor = [UIColor clearColor].CGColor;
view.layer.rasterizationScale = [UIScreen mainScreen].scale;
view.layer.shouldRasterize = YES;
这篇关于“具有边缘抗锯齿的渲染器"指的是具有边缘抗锯齿的渲染器.导致iOS 7中的UIAlertView延迟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！