Overview
This lecture covers the basics of using the Simulator app within Xcode to test and debug iOS, watchOS, and tvOS apps, including how to launch, configure, and use various features of Simulator.
Accessing Simulator in Xcode
- Simulator can be launched by running your app from Xcode or opening Simulator independently.
- To run your app, select a target device in Xcode's scheme menu and click Run.
- Running a WatchKit app opens simulators for both iOS and watchOS devices.
- To run a tvOS app, choose a tvOS device scheme and run it.
Launching Simulator Without Running an App
- Open Xcode, then select Xcode > Open Developer Tool > Simulator, or use the Dock shortcut.
- For watchOS, select Simulator (watchOS) from the Developer Tool menu.
Viewing and Using Installed Apps
- Access the Home screen in Simulator with Command-Shift-H or Hardware > Home.
- Swipe to navigate between Home screen pages, just like on a real device.
- Features and pre-installed apps vary by device type; some apps may not appear on unsupported devices.
Testing Web and Location Features
- Use Safari in Simulator to test iOS web apps by navigating to URLs.
- Simulate location awareness using Debug > Location > Custom Location; set latitude and longitude to test in Maps.
Changing Devices and OS Versions
- Switch devices via Hardware > Device menu.
- Add new simulators through Hardware > Device > Manage Devices and configure the type and OS version.
- Download additional OS versions in Xcode > Preferences > Downloads.
- Delete or rename simulators in the Devices window using the Action menu.
Altering Device Settings
- Access the Settings app from the Home screen to adjust simulator-specific options.
- Settings in Simulator are adapted for app testing, with testing-focused menus like Accessibility Inspector.
Manipulating Device Orientation
- Rotate the simulated device using Hardware > Rotate Left; the UI will adjust accordingly.
Testing Limitations
- Simulator cannot fully replace testing on real devices, as some apps/features (like Camera) are unavailable.
- Bugs and performance issues may not always appear in Simulator.
Quitting Simulator
- Quit Simulator via Simulator > Quit Simulator.
- Quitting Xcode does not close Simulator, and vice versa.
Key Terms & Definitions
- Simulator — A tool in Xcode that emulates iOS, watchOS, and tvOS devices for app testing.
- Scheme — The configuration in Xcode specifying which device and OS your app will run on.
- Home screen — The main app navigation interface, similar to actual devices.
Action Items / Next Steps
- Practice launching Simulator and running sample apps using provided steps.
- Explore the Settings app and Home screen navigation in Simulator.
- Try testing location and web features as described.
- Read the next chapters on advanced testing and debugging in Simulator.