錯誤原因：
在使用自動布局時，不斷的報下面的錯誤：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) (? ? "",? ? "",? ? "",? ? "",? ? "")Will attempt to recover by breaking constraintBreak on objc_exception_throw to catch this in the debugger.The methods in the UIConstraintBasedLayoutDebugging category on UIView listed inmay also be helpful.
可能出錯原因：
1，你的約束的確設置錯誤；
2，忘記設置控件的：setTranslatesAutoresizingMaskIntoConstraints 等于NO 。
3，騷年，快回頭看看你的代碼，是不是哪里手懶，沒用alloc初始化，用的是new啊，改回alloc初始化控件即可。
