能否通过Xcode将iPhone应用（含iPhone 7尺寸）运行在iPad物理设备上？

Hey there! Let's tackle your two questions about running iPhone apps on physical iPads using Xcode:

Absolutely you can—this is a common workflow for testing how iPhone apps behave on iPad hardware. Here's what you need to do:

• Connect your iPad to your Mac and confirm it's recognized by Xcode (check the Window > Devices and Simulators menu to see if it's listed and marked as available).
• In the top-left corner of Xcode, use the scheme selector dropdown to pick your connected iPad as the target device (instead of an iPhone simulator or device).
• Hit the run button—your iPhone app will launch on the iPad. If your app is set to iPhone-only (not Universal), it'll open in compatibility mode: this means it'll either show as a small iPhone-sized window (with an option to tap to zoom to full screen) or be zoomed by default, depending on your iPad's system settings.
• Quick note: Make sure your app's Deployment Target is compatible with the iOS version running on your iPad. If the iPad has a newer iOS version than your project's target, you'll need to update the Deployment Target in your project's General settings first.

Yes, and your iPhone 7-specific layouts will translate well here. Here's how it works:

• Default Behavior (No Extra Work): If your app is optimized for the iPhone 7's 4.7-inch screen (1334x750 resolution), running it on an iPad via Xcode will default to compatibility mode. The app will render at the iPhone 7's native resolution (or scale it to fit the iPad's screen if zoom is enabled), so your layouts should look identical to how they do on an actual iPhone 7.
• Force Exact iPhone 7 Size (No Zoom): If you want the app to stay fixed at the precise iPhone 7 dimensions (preventing users from zooming it to full screen), you can adjust two settings:
  1. Open your project in Xcode, go to your app target's General tab. In the Deployment Info section, set the Devices dropdown to iPhone (not Universal).
  2. Add the UIRequiresFullScreen key to your Info.plist file and set its value to YES. This locks the app to its native iPhone size, so it won't expand to fill the iPad's screen.
• If your app uses auto layout or size classes, they'll still work as expected in this mode—Xcode treats the app as running in an iPhone context even on the iPad.

内容的提问来源于stack exchange，提问作者Elavarasan