Autolayout约束错误

Question

我的iPad项目有自动布局限制问题，当我旋转设备时出现此错误：

2013-06-03 13:16:24.969 PDFViewer[7534:907] Unable to simultaneously satisfy constraints.
    Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 
(
    "<NSLayoutConstraint:0x1f5525e0 H:[UIScrollView:0x1f551910]-(970)-|   (Names: '|':UIView:0x1f547740 )>",
    "<NSLayoutConstraint:0x1f5525a0 H:|-(0)-[UIScrollView:0x1f551910]   (Names: '|':UIView:0x1f547740 )>",
    "<NSAutoresizingMaskLayoutConstraint:0x1f562520 h=--- v=--- H:[UIWindow:0x1f543890(768)]>",
    "<NSAutoresizingMaskLayoutConstraint:0x1f560af0 h=-&- v=-&- UIView:0x1f547740.width == UIWindow:0x1f543890.width>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x1f5525e0 H:[UIScrollView:0x1f551910]-(970)-|   (Names: '|':UIView:0x1f547740 )>

好吧，有些约束是有争议的，但是我没有自己设置任何约束，它们都是在Interface Builder中自动设置的，我无法删除它们。我想要的非常简单，滚动视图，固定宽度和100％高度，以及一个集合视图，剩余宽度和100％高度。

Autolayout让我发疯，不知道吗？

编辑：这是我在IB中定义的约束

Answer 1

错误是由自动约束引起的，更准确地说是这个：

"<NSLayoutConstraint:0x1f5525e0 H:[UIScrollView:0x1f551910]-(970)-|   (Names: '|':UIView:0x1f547740 )>",

由于它被IB添加，你无法删除它，所以为了忽略它我将优先级设置为1.