ios - ストーリーボードからUITableViewの上にUIViewを追加できません

Question

ナビゲーションバーを置き換えて、UITableViewの上にUIViewを追加しようとしています:

そして、これがコントローラーの構造です。

コンソール出力は次のとおりです。

2013-07-10 00:54:54.361 WeatherSX[15225:c07] 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:0x9965880 V:|-(0)-[UIView:0x9964960]   (Names: '|':UIView:0x9964900 )>",
    "<NSLayoutConstraint:0x99657e0 V:[UIView:0x9964960]-(NSSpace(8))-[UITableView:0x902ca00]>",
    "<NSLayoutConstraint:0x9964b00 V:[UITableView:0x902ca00(469)]>",
    "<NSLayoutConstraint:0x9965720 UITabBar:0x9960fd0.bottom == UIView:0x9964900.bottom>",
    "<NSLayoutConstraint:0x99656e0 V:[UITableView:0x902ca00]-(0)-[UITabBar:0x9960fd0]>",
    "<NSAutoresizingMaskLayoutConstraint:0x81762a0 h=--& v=--& V:[UIView:0x9964900(460)]>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x9964b00 V:[UITableView:0x902ca00(469)]>

Break on objc_exception_throw to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.

何が問題ですか？以前にそのようなエラーに直面したことはありません。助けてくれてありがとう。