添加长按保存图片弹窗后，提示约束警告

[shijian123]

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.
(
"<NSLayoutConstraint:0x2828cb3e0 UIView:0x14e8fea50.width == - 16 (active)>"
)