如何在UIViewAlertForUnsatisfiableConstraints陷阱？ [英] How to trap on UIViewAlertForUnsatisfiableConstraints?

问题描述

我看到一个错误出现在我的日志中的调试器：

I'm seeing an error appear in my debugger log:

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x191f0920 H:[MPKnockoutButton:0x17a876b0]-(34)-[MPDetailSlider:0x17a8bc50](LTR)>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.

我如何陷阱上打电话？它不会在我的code的任何地方出现。

How do I trap on that call? It does not appear anywhere in my code.

推荐答案

您需要添加一个符号断点。苹果提供了一个<一个href=\"https://developer.apple.com/library/ios/recipes/x$c$c_help-breakpoint_navigator/articles/adding_a_symbolic_breakpoint.html\">excellent指南如何做到这一点。

You'll want to add a Symbolic Breakpoint. Apple provides an excellent guide on how to do this.

1. 打开断点导航 CMD + 7


2. 点击添加按钮在左下角


3. 选择添加符号断点...


4. 凡说符号只需键入 UIViewAlertForUnsatisfiableConstraints

1. Open the Breakpoint Navigator cmd+7
2. Click the Add button in the lower left
3. Select Add Symbolic Breakpoint...
4. Where it says Symbol just type in UIViewAlertForUnsatisfiableConstraints

您也可以把它像任何其他的断点，打开和关闭它，添加动作，或记录消息。

You can also treat it like any other breakpoint, turning it on and off, adding actions, or log messages.

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