シミュレーターとデバイスでの実行

The canvas is great, but to feel the real thing you run your app. Xcode builds it and launches it like a user would. 🚀

The simulator is a virtual iPhone on your Mac. It lets you test your app without owning every physical device.

In the toolbar, use the scheme menu to choose a simulator like iPhone 15. This sets where your app will launch when you run it.

Click the Run button, the triangular play icon, or press Command-R. Xcode compiles your code and boots the simulator for you.

The first build can be slow as Xcode compiles everything. Later runs are much faster because it only rebuilds what changed.

Once it launches, tap and swipe in the simulator like a real phone. Use your mouse or trackpad to test every interaction. 🖐️

The square Stop button ends the running app. Stop and run again whenever you want a fresh launch of your latest code.

At the bottom, the console shows logs and any print output from your app. It is the first place to look when something misbehaves.

Plug in an iPhone and pick it in the scheme menu to run on a real device. Real hardware shows true performance and gestures.

For device runs, Xcode needs a free Apple ID in Settings to sign the app. This trusts your build so the iPhone will open it.

Use the simulator for fast everyday testing, and a real device before release to catch issues only true hardware reveals.

You can now run your app: pick a simulator or device, press Run, interact, and watch the console. Your first app is alive! 🎉