自动布局不iOS8上-X $ C $ 6即时更新帧

我用自动布局在 X $ C $ 6 。

我已经申请了以下限制到滚动视图。

I have applied the following constraints to a scrollview.

我试图访​​问帧此滚动型的 - viewDidLoad中和 - viewWillAppear中的iPhone 4Inchs设备方法。这里的问题是，滚动视图的宽度显示登录600。但是当我用我自动布局的宽度应该是300 4Ichs设备。
好像自动布局将一定的时间间隔后适用。它显示正确的宽度 - viewDidAppear 方法30​​0

I have tried to access the frame of this scrollview in -viewDidLoad and -viewWillAppear methods for iPhone 4Inchs device. Here problem is, the scrollview's width is showing 600 in Log. But the width should be 300 in 4Ichs device as i'm using autolayout. Seems autolayout will apply after some time interval. It is showing correct width in -viewDidAppear method as 300.

有什么办法来访问原始帧 - viewDidLoad中和 - viewWillAppear中方法

Is there any way to access the original frames in -viewDidLoad and -viewWillAppear methods ?

先谢谢了。