自动布局 Autolayout 报错：Unable to simultaneously satisfy constraints.

在使用自动布局时，能正常运行，但是控制台不断的报下面的错误：

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.

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Will attempt to recover by breaking constraintMake a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.The methods in the UIConstraintBasedLayoutDebugging category on UIView listed inmay also be helpful

解决方法：

Lable的问题，Label所有constraint删除就不报错，有些其实并不冲突，但是可以全部都删除，然后自动更新，问题就解决了，一晚上都在尝试，希望能帮到你！

NSLayoutConstraint  控制台打印出来几条，就说明有几处有问题。