iphone - 无法同时满足约束

Question

实际上使用xib集成了相机应用程序，因为我将uiview放在一个视图上，然后我放置了imageview，再次在imageview上查看以进行裁剪。然后运行我得到这个错误的项目。

2013-07-23 12:45:49.936 Camera_App1 [30668:907] 无法同时满足约束。以下列表中的至少一个约束可能是您不想要的。试试这个：（1）查看每个约束并尝试找出您不期望的；(2) 找到添加了一个或多个不需要的约束的代码并修复它。（注意：如果您看到不理解的 NSAutoresizingMaskLayoutConstraints，请参阅 UIView 属性 translatesAutoresizingMaskIntoConstraints 的文档）

(
    "<NSAutoresizingMaskLayoutConstraint:0x1f5b3d10 h=--& v=--& V:[UIView:0x1f5a2f70(460)]>",
    "<NSLayoutConstraint:0x1f5a3c80 V:[UIView:0x1f5a31b0]-(385)-|   (Names: '|':UIView:0x1f5a3120 )>",
    "<NSLayoutConstraint:0x1f5a3f80 V:|-(0)-[UIView:0x1f5a3120]   (Names: '|':UIView:0x1f5a2f70 )>",
    "<NSLayoutConstraint:0x1f5a3f40 V:[UIView:0x1f5a3120]-(63)-|   (Names: '|':UIView:0x1f5a2f70 )>",
    "<NSLayoutConstraint:0x1f5a3bc0 V:|-(61)-[UIView:0x1f5a31b0]   (Names: '|':UIView:0x1f5a3120 )>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x1f5a3c80 V:[UIView:0x1f5a31b0]-(385)-|   (Names: '|':UIView:0x1f5a3120 )>

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.
2013-07-23 12:45:58.697 Camera_App1[30668:907] media type=public.image
2013-07-23 12:45:58.701 Camera_App1[30668:907] global=public.image
2013-07-23 12:45:58.858 Camera_App1[30668:907] 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:0x1f5a3c80 V:[UIView:0x1f5a31b0]-(385)-|   (Names: '|':UIView:0x1f5a3120 )>",
    "<NSLayoutConstraint:0x1f5a3f80 V:|-(0)-[UIView:0x1f5a3120]   (Names: '|':UIView:0x1f5a2f70 )>",
    "<NSLayoutConstraint:0x1f5a3f40 V:[UIView:0x1f5a3120]-(63)-|   (Names: '|':UIView:0x1f5a2f70 )>",
    "<NSLayoutConstraint:0x1f5a3bc0 V:|-(61)-[UIView:0x1f5a31b0]   (Names: '|':UIView:0x1f5a3120 )>",
    "<NSAutoresizingMaskLayoutConstraint:0x1f53a430 h=--& v=--& V:[UIView:0x1f5a2f70(460)]>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x1f5a3c80 V:[UIView:0x1f5a31b0]-(385)-|   (Names: '|':UIView:0x1f5a3120 )>

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.

score 33 · Accepted Answer

错误就是它所说的，并为您开始调试提供了非常清晰的说明。有两个冲突的约束。每个都指示 Auto Layout 运行时执行与另一个相矛盾的操作。

如果您以编程方式创建和添加视图，那么 Auto Resizing 属性很可能已自动转换为 Auto Layout 约束。

因此，首先要尝试的是，使用您以编程方式创建的视图，通过设置禁用它：

myProgrammaticView.translatesAutoresizingMaskIntoConstraints = NO;

score 4 · Accepted Answer

我遇到了同样的问题，经过数小时的搜索，原来问题是因为通话中或热点状态栏被切换，（热点已打开，正在通话中），为了解决问题，我在 appdelegate 中添加了：

    func application(application: UIApplication, willChangeStatusBarFrame newStatusBarFrame: CGRect) {
    let windows = UIApplication.sharedApplication().windows

    for window in windows {
        window.removeConstraints(window.constraints)
    }
}

score 2 · Accepted Answer

试试这个步骤，它对我有帮助。

选择您的对象 > 编辑器 > 解决自动布局问题 > 重置为建议的约束

score 1 · Accepted Answer

我知道这个线程很老，但这是我的经验和解决方案。

选择视图（UILabel、UIImage 等）编辑器 > 固定 >（选择...）到 Superview 编辑器 > 解决自动布局问题 > 添加缺少的约束

此错误是您添加的约束之间的冲突。删除不需要的约束。不要在同一方向和类型上使用多个约束。

我建议您使用 SnapKit。它是一个自动布局框架，使用起来非常方便

 import SnapKit

 var label = UILabel()

 label.snp_makeConstraints { (make) -> Void in
    make.centerX.equalTo(0)
    make.centerY.equalTo(0)
    make.width.equalTo(30)
    make.height.equalTo(30)
 }

https://github.com/SnapKit/SnapKit希望这有帮助:)

score 0 · Accepted Answer

就我而言，由于导航栏，我收到了这个错误。添加新 UIViewController 导致此错误。

我删除了旧的导航栏，然后通过转到 Editor ➞ Embed In ➞ Navigation Controller重新添加它。

score -2 · Accepted Answer

我重置为建议的约束并解决了问题，请参见此处。

选择您的对象 > 编辑器 > 解决自动布局问题 > 重置为建议的约束

iphone - 无法同时满足约束

6 回答 6

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