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)>" )