Masonry父容器根据自容器宽度自适应报错

说明

在做一个UI界面中，开发了一个常见的布局，就是父容器根据自容器的宽度自适应，具体说明是：2的部分根据3的文字宽度来自适应，1根据2的宽度再自适应，如题如下：

111.png

但是添加好约束后报约束错误：

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.
(
,
,
,
,
,
)

具体原因是：是最外层1的容器本身没有约束，导致的问题，
解放方案：将1的那个view设置个属性translatesAutoresizingMaskIntoConstraints

// 将1的那个view，在这个页面中是navigationItem.titleView,进行下面的设置
xxx.translatesAutoresizingMaskIntoConstraints = NO;

参考：translatesAutoresizingMaskIntoConstraints 详解