Important:The information in this document is deprecated in Xcode 9. For Xcode 9 and later, see Simulator Help by choosing Help > Simulator Help in Simulator.
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Simulator app, available within Xcode, presents the iPhone, iPad, or Apple Watch user interface in a window on your Mac computer. You interact with Simulator by using the keyboard and the mouse to emulate taps, device rotation, and other user actions.
The chapter presents the basics of using Simulator. You can perform these steps using your own iOS app or, if you do not have an app to use, with the HelloWorld sample code. For more detailed information on interacting with Simulator and using it to test and debug your apps, refer to the later chapters in this guide.
Access Simulator from Xcode
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- Simulator won't run on Mac OS 10.6.8. Submitted by Gary Miller on September 10, 2012 - 2:54pm. Assumed Answered. Check with the developer to make sure RhoSimulator works with this version of Mac OS X.' I just did a quick peek on my system is running Mac OS 10.6.8 as well and RhoSimulator still works just fine.
There are two different ways to access Simulator through Xcode. The first way is to run your app in Simulator, and the second way is to launch Simulator without running an app.
Running Your iOS App
Mac Os Library Developer Coresimulator Key Here's a quick guide on how to clean junk files on Mac. We'll go over types of junk you might have on your Mac and why it's.
When testing an app in Simulator, it is easiest to launch and run your app in Simulator directly from your Xcode project. To run your app in Simulator, choose an iOS simulator—for example, iPhone 6 Plus, iPad Air, or iPhone 6 + Apple Watch - 38mm—from the Xcode scheme pop-up menu, and click Run. Xcode builds your project and then launches the most recent version of your app running in Simulator on your Mac screen, as shown in Figure 1-1.
Note: If you are testing an app with a deployment target of iPad, you can test only on a simulated iPad. If you are testing an app with a deployment target of iPhone or universal, you can test on either a simulated iPhone or a simulated iPad.
Running Your watchOS App
To run your WatckKit app, choose a combination of an iOS device and watchOS device from the Xcode scheme pop-up menu. For example, to run the watch app in a 38mm watch paired with an iPhone 6, choose 'iPhone 6 + Apple Watch - 38mm' from the scheme pop-up menu.
Running the WatchKit target launches two simulators, one for the iOS device and one for the watchOS device. Figure 1-2 shows an iPhone 6 and a 42mm watch running in two different simulators.
Running Your tvOS App
To run your tvOS App, choose a tvOS device from the Xcode scheme pop-up menu. Running the tvOS target launches the most recent version of your app in a simulated new Apple TV device, as shown in Figure 1-3.
Launching Simulator Without Running an App
At times, you may want to launch Simulator without running an app. This approach is helpful if you want to test how your app launches from the Home screen of a device or if you want to test a web app in Safari on a simulated iOS device.
To launch a Simulator without running an app
Launch Xcode.
Do one of the following:
Choose Xcode > Open Developer Tool > Simulator.
Control-click the Xcode icon in the Dock, and from the shortcut menu, choose Open Developer Tool > Simulator.
To launch a watchOS Simulator without running an app
Launch Xcode.
Do one of the following:
Choose Xcode > Open Developer Tool > Simulator (watchOS).
Control-click the Xcode icon in the Dock, and from the shortcut menu, choose Open Developer Tool > Simulator (watchOS).
Simulator opens and displays the Home screen of whichever simulated device was last used.
View the Installed Apps
From the Home screen, you have access to all of the apps that are installed in the simulation environment. There are two ways to access the Home screen in Simulator from your app:
Press Command-Shift-H.
Choose Hardware > Home.
Use the installed apps to test your app's interaction with them. For example, if you are testing a game, you can use Simulator to ensure that the game is using Game Center correctly.
iOS Device Home Screen
Much like the Home screen on an iOS device, the simulator's iOS Home screen has multiple pages. After clicking the Home button (or accessing the Home screen through the Hardware menu), you arrive at the second page of the Home screen. To get to the first page, where all of the preinstalled apps are found, swipe to the first Home screen by dragging to the right on the simulator screen.
On the Home screen, you see that all of the apps that have been preloaded into Simulator. See iOS Device Home Screen.
The apps that you see on the Home screen are specific to the iOS device simulation environment. Because Passbook and the Health app are available only for the iPhone, these apps don't appear if you are simulating a legacy device or an unsupported device type.
watchOS Device Home Screen
The Home screen for a simulated watchOS device behaves the same as it would on an actual device. You can click and drag to simulate the finger dragging around the screen and launch an app by clicking on it. Figure 1-4 shows the home screen of a 42mm watch with a developer app, the Lister sample code.
Use Safari to Test Web Apps
From the Home screen, you can access Safari within Simulator. Use Safari to test your iOS web apps directly on your Mac.
From the Home screen, click Safari.
In the address field in Safari, type the URL of your web app and press the Return key.
If your Mac is connected to the Internet, it displays the mobile version of the URL you specified. For example, type apple.com into the address field and press Return. Safari displays the Apple website. See Figure 1-6.
Use Maps to Simulate Location Awareness
Simulator provides tools to assist you in debugging your apps. One of the many features you can debug in Simulator is location awareness within your app. A knight on the town mac os. Set a location by choosing Debug > Location > location of choice. The menu has items to simulate a static location or following a route.
A simulated watchOS device with the location set to None checks the paired iPhone device for the location.
You can specify your own location, which can be seen in the Maps app.
From the Home screen, click Maps.
Choose Debug > Location > Custom Location.
In the window that appears, type the number
40.75in the latitude field and the number-73.75in the longitude field.Click OK.
Click the Current Location button in the bottom-left corner of the simulated device screen.
After completing this task, notice that the blue dot representing your location is in New York, NY, near the Long Island Expressway, as shown in Figure 1-7.
Change the Simulated Device and OS Version
Simulator provides the ability to simulate many different combinations of device type and OS version. A device type is a model of iPhone, iPad, or Apple TV. Some iPhone devices can also have a paired Apple Watch. Each device-OS combination has its own simulation environment with its own settings and apps. Simulator provides simulators for common device-iOS, device-watchOS-iOS device, and device-tvOS combinations. You can also add simulators for a specific combination you want to test. However, not all device type and OS version combinations are available.
Note: To test apps for the iPad mini, use a simulated iPad with the same pixel resolution as the iPad mini.
You can switch between different device-OS combinations. Switching closes the window for the existing device and then opens a new window with the selected device. The existing device goes through a normal OS shutdown sequence, though the timeout might be longer than the one on a real device. The new device goes through a normal OS startup sequence.
To change the simulated device
Choose a Hardware > Device > device of choice.
Simulator closes the active device window and opens a new window with the selected device.
If the device type and OS version combination you want to use is not in the Device submenu, create a simulator for it.
To add a simulator
Choose Hardware > Device > Manage Devices.
Xcode opens the Devices window.
At the bottom of the left column, click the Add button (+).
In the dialog that appears, enter a name in the Simulator Name text field and choose the device from the Device Type pop-up menu.
Choose the OS version from the iOS Version pop-up menu.
Alternatively, if the iOS version you want to use isn't in the iOS Version pop-up menu, choose 'Download more simulators' and follow the steps to download a simulator.
Click Create.
If the OS version you want to use is not installed, download it and follow the steps to add a simulator again.
To download a simulator
In Xcode, choose Xcode > Preferences.
In the Preferences window, click Downloads.
In Components, find the legacy simulator version you want to add, and click the Install button.
You can also delete and rename simulators in the Devices window.
To delete a simulator
In Simulator, choose Hardware > Device > Manage Devices, or in Xcode, choose Window > Devices.
Xcode opens the Devices window.
In the left column, select the simulator.
At the bottom of the left column, click the Action button (the gear next to the Add button).
Choose Delete from the Action menu.
In the dialog that appears, click Delete.
To rename a simulator, choose Rename from the Action menu and enter a new name.
For how to manage real devices that appear in the Devices window, read Devices Window Help.
Alter the Settings of the Simulated Device
You can alter the settings within Simulator to help test your app.
On a simulated device, use the Settings app. To open the Settings app, go to the Home screen and click or on tvOS, choose Settings. In Figure 1-8 you see the Settings app as it appears when launched in the iOS simulation environment.
The Simulator settings differ from the settings found on a hardware device. Simulator is designed for testing your apps, whereas a hardware device is designed for use. Because Simulator is designed for testing apps, its settings are naturally focused on testing, too. For example, in a simulated iOS device the Accessibility menu provides the ability to turn on the Accessibility Inspector, and the Accessibility menu on a device allows you to turn on and off different accessibility features.
Through the settings, you can test both accessibility and localization of your app. Every web is a home mac os. See Testing and Debugging in iOS Simulator for information on how to manipulate your settings for the various types of testing you are interested in.
Remember: Changes made in the Settings app of simulated device affect only the simulation environment that is currently running.
Rotate iOS Devices
You can use Simulator to manipulate the simulated device much as you do a physical device.
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To rotate your simulated device, choose Hardware > Rotate Left. When you rotate your simulated device, Settings rotates (see Figure 1-9), just as it would on a hardware device.
Test in Simulator and on a Device
Simulator is designed to assist you in designing, rapidly prototyping, and testing your app, but it should never serve as your sole platform for testing. One reason is that not all apps are available in the simulator. For example, the Camera app is available only on hardware devices and cannot be replicated in the simulator.
In addition, not all bugs and performance problems can be caught through testing in Simulator alone. You'll learn more about performance differences in Testing and Debugging in iOS Simulator. You can also find more information on testing your app on a device in Launching Your App on Devices in App Distribution Guide.
Quit Simulator
Simulator continues running until you quit it. Quitting Xcode will not close Simulator because they are separate applications. Similarly quitting simulator will not close Xcode.
To quit Simulator, choose Simulator > Quit Simulator. The device is shut down, terminating any running apps.
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Note: Both Simulator and watchOS Simulator can be open at the same time.
Copyright © 2018 Apple Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2018-02-15
-->This guide describes how to use Pair to Mac to connect Visual Studio 2019to a Mac build host. The same instructions apply to Visual Studio 2017.
Overview
Building native iOS applications requires access to Apple's build tools,which only run on a Mac. Because of this, Visual Studio 2019 must connect toa network-accessible Mac to build Xamarin.iOS applications.
Visual Studio 2019's Pair to Mac feature discovers, connects to,authenticates with, and remembers Mac build hosts so that Windows-basediOS developers can work productively.
Pair to Mac enables the following development workflow:
Developers can write Xamarin.iOS code in Visual Studio 2019.
Visual Studio 2019 opens a network connection to a Mac build host anduses the build tools on that machine to compile and sign the iOS app.
There is no need to run a separate application on the Mac – VisualStudio 2019 invokes Mac builds securely over SSH.
Visual Studio 2019 is notified of changes as soon as they happen. Forexample, when an iOS device is plugged in to the Mac or becomes availableon the network, the iOS Toolbar updates instantly.
Multiple instances of Visual Studio 2019 can connect to the Macsimultaneously.
It's possible to use the Windows command-line to build iOS applications.
Note
Before following the instructions in this guide, complete the following steps:
- On a Windows machine, install Visual Studio 2019
- On a Mac, install Xcode and Visual Studio for Mac
- You must manually open Xcode after installing so that it can add any additional components.
If you would prefer not to install Visual Studio for Mac, Visual Studio 2019can automatically configure the Mac build host with Xamarin.iOS and Mono.You must still install and run Xcode.For more information, see Automatic Mac provisioning.
Enable remote login on the Mac
To set up the Mac build host, first enable remote login:
On the Mac, open System Preferences and go to the Sharing pane.
Check Remote Login in the Service list.
Make sure that it is configured to allow access for All users, orthat your Mac username or group is included in the list of allowedusers.
If prompted, configure the macOS firewall.
If you have set the macOS firewall to block incoming connections, youmay need to allow
mono-sgento receive incoming connections. An alertappears to prompt you if this is the case.If it is on the same network as the Windows machine, the Mac shouldnow be discoverable by Visual Studio 2019. If the Mac is still notdiscoverable, try manually adding a Mac or takea look at the troubleshooting guide.
Connect to the Mac from Visual Studio 2019
Now that remote login is enabled, connect Visual Studio 2019 to the Mac.
In Visual Studio 2019, open an existing iOS project or create a new oneby choosing File > New > Project and then selecting an iOS projecttemplate.
Open the Pair to Mac dialog.
Use the Pair to Mac button iOS toolbar:
Or, select Tools > iOS > Pair to Mac.
The Pair to Mac dialog displays a list of all previously-connectedand currently-available Mac build hosts:
Select a Mac in the list. Click Connect.
Enter your username and password.
The first time you connect to any particular Mac, you areprompted to enter your username and password for that machine:
Tip
When logging in, use your system username rather than full name.
Pair to Mac uses these credentials to create a new SSH connectionto the Mac. If it succeeds, a key is added to the authorized_keysfile on the Mac. Subsequent connections to the same Mac will loginautomatically.
Pair to Mac automatically configures the Mac.
Starting with Visual Studio 2019 version15.6,Visual Studio 2019 installs or updates Mono and Xamarin.iOS on aconnected Mac build host as needed (note that Xcode must still beinstalled manually). See Automatic Macprovisioning for more details.
Look for the connection status icon.
When Visual Studio 2019 is connected to a Mac, that Mac's itemin the Pair to Mac dialog displays an icon indicating thatit is currently connected:
There can be only one connected Mac at a time.
Tip
Right-clicking any Mac in the Pair to Mac list brings up a contextmenu that allows you to Connect.., Forget this Mac, orDisconnect:
If you choose Forget this Mac, your credentials for the selectedMac will be forgotten. To reconnect to that Mac, you will need to re-enteryour username and password.
If you have successfully paired to a Mac build host, you are ready to buildXamarin.iOS apps in Visual Studio 2019. Take a look at theIntroduction to Xamarin.iOS for Visual Studioguide.
If you have not been able to pair a Mac, try manually adding aMac or take a look at the troubleshootingguide.
Manually add a Mac
If you do not see a particular Mac listed in the Pair to Mac dialog,add it manually:
Locate your Mac's IP address.
Open System Preferences > Sharing > Remote Login on your Mac:
Alternatively, use the command line. In Terminal, issue this command:
Depending on your network configuration, you may need to use aninterface name other than
en0. For example:en1,en2, etc.
In Visual Studio 2019's Pair to Mac dialog, select Add Mac..:
Enter the Mac's IP address and click Add:
Enter your username and password for the Mac:
Tip
When logging in, use your system username rather than full name.
Click Login to connect Visual Studio 2019 to the Mac over SSH and addit to the list of known machines.
Automatic Mac provisioning
Starting with Visual Studio 2019 version 15.6,Pair to Mac automatically provisions a Mac with software necessary forbuilding Xamarin.iOS applications: Mono, Xamarin.iOS (the softwareframework, not the Visual Studio for Mac IDE), and various Xcode-relatedtools (but not Xcode itself).
Important
- Pair to Mac cannot install Xcode; you must manually install it on theMac build host. It is required for Xamarin.iOS development.
- Automatic Mac provisioning requires that remote login isenabled on the Mac, and the Mac must be network-accessible to the Windowsmachine. See Enabling remote login on the Macfor more details.
- Automatic Mac provisioning requires 3GB of free space on the Mac to install Xamarin.iOS.
Pair to Mac performs necessary software installations/updates when VisualStudio 2019 is connecting to theMac.
Mono
Pair to Mac will check to make sure that Mono is installed. If it is notinstalled, Pair to Mac will download and install the latest stable versionof Mono on the Mac.
Progress is indicated by various prompts, as shown by the followingscreenshots (click to zoom):
| Mono | Install Check | Downloading | Installing |
|---|
Xamarin.iOS
Pair to Mac upgrades Xamarin.iOS on the Mac to match the versioninstalled on the Windows machine.
Important
Pair to Mac will not downgrade Xamarin.iOS on the Mac from alpha/betato stable. If you have Visual Studio for Mac installed, set yourrelease channel asfollows:
- If you use Visual Studio 2019, select the Stable updates channel inVisual Studio for Mac.
- If you use Visual Studio 2019 Preview, select the Alpha updateschannel in Visual Studio for Mac.
Progress is indicated by various prompts, as shown by the followingscreenshots (click to zoom):
| Xamarin.iOS | Install Check | Downloading | Installing |
|---|
Xcode tools and license
Pair to Mac will also check to determine whether Xcode has been installedand its license accepted. While Pair to Mac does not install Xcode, itdoes prompt for license acceptance, as shown in the following screenshots(click to zoom):
| Xcode | Install Check | License Acceptance |
|---|
Additionally, Pair to Mac will install or update various packagesdistributed with Xcode. For example:
- MobileDeviceDevelopment.pkg
- XcodeExtensionSupport.pkg
- MobileDevice.pkg
- XcodeSystemResources.pkg
The installation of these packages happens quickly and without a prompt.
Note
These tools are distinct from the Xcode Command Line Tools, whichas of macOS 10.9 areinstalled with Xcode.
Troubleshooting automatic Mac provisioning
If you encounter any trouble using automatic Mac provisioning, take a lookat the Visual Studio 2019 IDE logs, stored in%LOCALAPPDATA%XamarinLogs16.0. These logs may contain error messagesto help you better diagnose the failure or get support.
Build iOS apps from the Windows command-line
Pair to Mac supports building Xamarin.iOS applications from the commandline. For example:
The parameters passed to msbuild in the above example are:
ServerAddress– The IP address of the Mac build host.ServerUser– The username to use when logging in to the Mac build host.Use your system username rather than your full name.ServerPassword– The password to use when logging in to the Mac build host.
Note
Visual Studio 2019 stores msbuild in the following directory:C:Program Files (x86)Microsoft Visual Studio2019MSBuildCurrentBin
The first time Pair to Mac logs in to a particular Mac build host fromeither Visual Studio 2019 or the command-line, it sets up SSH keys. With thesekeys, future logins will not require a username or password. Newlycreated keys are stored in %LOCALAPPDATA%XamarinMonoTouch.
If the ServerPassword parameter is omitted from a command-line buildinvocation, Pair to Mac attempts to log in to the Mac build hostusing the saved SSH keys.
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Summary
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This article described how to use Pair to Mac to connect Visual Studio 2019 to aMac build host, enabling Visual Studio 2019 developers to build native iOSapplications with Xamarin.iOS.
Next steps
