Swift中XCode中计算器布局的难度

I'm working on a Calculator App, and all my code executes perfectly, but the only thing I am hung up on is the layout. On all phones the layout works perfectly, constraints seem to be perfect! Except for the iPhone 4, it just doesn't seem to be tall enough! It's quite frustrating as it's my first real project I've worked on and to see it stopped by something like this is annoying to say the least.I'm working on a Calculator App, and all my cod