cocoa 项目错误

Question

我的项目从 Xcode 中跳出此错误代码。它适用于 OS X。我该如何解决这个问题？

2013-03-11 20:39:12.804 Project1[2038:303] Unable to simultaneously satisfy constraints:
   (
        "<NSAutoresizingMaskLayoutConstraint:0x101a1e8e0 h=--& v=--& H:    [NSView:0x100130d40(0)]>",
    "<NSLayoutConstraint:0x10013a5d0 H:[NSScrollView:0x1001310b0]-(17)-|   (Names: '|':NSView:0x100130d40 )>",
    "<NSLayoutConstraint:0x1001382c0 H:|-(17)-[NSScrollView:0x1001310b0]   (Names: '|':NSView:0x100130d40 )>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x10013a5d0 H:[NSScrollView:0x1001310b0]-(17)-|   (Names: '|':NSView:0x100130d40 )>

Set the NSUserDefault NSConstraintBasedLayoutVisualizeMutuallyExclusiveConstraints to YES to have -[NSWindow visualizeConstraints:] automatically called when this happens.  And/or, break on objc_exception_throw to catch this in the debugger.
2013-03-11 20:39:12.806 Project1[2038:303] Unable to simultaneously satisfy constraints:
(
    "<NSAutoresizingMaskLayoutConstraint:0x101a1e9a0 h=--& v=--& V:[NSView:0x100130d40(0)]>",
    "<NSLayoutConstraint:0x10013a630 V:|-(102)-[NSScrollView:0x1001310b0]   (Names: '|':NSView:0x100130d40 )>",
    "<NSLayoutConstraint:0x100138320 V:[NSScrollView:0x1001310b0]-(17)-|   (Names: '|':NSView:0x100130d40 )>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x100138320 V:[NSScrollView:0x1001310b0]-(17)-|   (Names: '|':NSView:0x100130d40 )>

Set the NSUserDefault NSConstraintBasedLayoutVisualizeMutuallyExclusiveConstraints to YES to have -[NSWindow visualizeConstraints:] automatically called when this happens.  And/or, break on objc_exception_throw to catch this in the debugger.

Answer 1

您设置的自动布局约束与其他约束相冲突。

这会发生:

如果您将两个按钮之间的差值设置为 10，距离窗口边框的差值设置为 20。但是您的按钮发现它距窗口边框的距离不是 20，并且它无法向边框移动，因为您的其他约束是 10。