Xcode 8 AutoLayout / Constraints：更改视图以适合每个Iphone屏幕尺寸吗？

Question

I am new to Xcode, and have been trying to figure out how to use AutoLayout and constraints. Long story short, after I hit 'add missing constraints' the Iphone 7 screen looks just as I intended, but both the Iphone 7 plus and Iphone SE screens look completely screwed up. What can I do to fix this so that every screen looks like the Iphone 7?

Iphone 7

Example Iphone SE (screwed up)

Answer 1

add missing constrains option means: adds the constraints needed to have a nonambiguous layout. may not work well for all iOS devices, and may not work well for device's rotation changes or view size changes, so, check view's constrains in size inspector panel

for more info: check Apple's auto layout guide