• S. Mallick (Wordapter)

Testing of React Native App on A Real iPhone: procedure to know

Native apps are always used in high-end software to use in-built features of your device. These apps have the native code or the same code as the OS you use it on. That’s why every time you create a native app for either Android or iOS, you have to write the whole code. This makes native apps faster and smarter than other development techniques.


That is perfectly fine that you can develop an application through React-Native. But what if you want to test it on a device or iPhone? Specifically, for iOS developers, it is essential that they can run their React-Native Apps on their iPhones for that bug removal and modifications are simple.

In this article, we will guide you through a step-by-step procedure for testing your React-Native Apps on iPhones. Please go through all the methods we have discussed to fix the errors. Let’s have a look at it -


Testing Requirements for React-Native Apps on Your iPhone!


The setup is easy to test the app on the iPhone, and you can automate your apps on your iOS device. However, this is not the only reason why developers want to test their apps on the iPhone device. The simulator cannot help in testing specific features like phone calls, capturing through the camera, GPS testing, compass, and messaging features.


Additionally, developers have to test their incoming calls, data and connectivity, low space notifications, and other features that they are adding through codes. Therefore, testing on a device comes into the picture.


Your device is not like Mac, and it is different in comparison to hardware. If you are developing games or apps that require higher CPU usage, then it will not hang on Mac. Unexpectedly, it might happen with your iOS device because Mac has higher specifications for hardware. So, that is why the following steps will help you in developing apps for iOS.


Step 1: - Plug-In Your Real iPhone Device


The first step in testing apps on iOS devices is to plug in your device with your Mac. Then, open your Xcode. On the right side of the PLAY and STOP buttons, you can see your device name. Always try to use an original cable as third-party cables can interrupt the whole process. Make sure you don’t use any of that as it can end up harming your iOS device.


Complications with This Step:


At this stage, you might face common problems that are not problems. There will be a message like failed to codesign. You can fix this immediately by adding your Apple ID that you have enrolled in the Developer Program. Or you will have to enroll in the Apple Developer Program. Before you proceed, always look into the details of these programs. It will give you a better view of the whole process.


Another possibility of complications is that it might show a message like ‘DISK IMAGE COULD NOT BE MOUNTED’. What is this error? It wants to clarify that ‘THE DEVELOPER DISK IMAGE COULD NOT BE MOUNTED’. by that, it means you have a plugin for a new version of iOS that is not supported by Xcode. If the version of Xcode does not support the current iOS version, then this happens. Therefore, you have to update the current version of Xcode to the latest version from the app store.


Step 2: - Setting Up Right Deployment Target:


In this step, your Xcode project setup has to be equal to or less than the version of iOS. Do you use the iPhone having iOS 7.0? If yes, and if you set the deployment target as 8.0 or unequal to 7.0, then it will not work. Similarly, if the iOS version that you have installed on the iPhone is 8.0, then you have to set the deployment target as 8.0 zero.



Step 3: - Fixing of Error & Fix Connection for API Hosted on Local Development Server.


After completion of the first two steps, you have to solve an error like this: - COULD NOT CONNECT TO DEVELOPMENT SERVER. Fix this error before proceeding further. It happens as soon as you install the app on your iOS device. Suddenly, it will show this error. It will ask you to ensure node servers running and available on the same.


You can fix this error by locating one line. Additionally, you have to replace LOCALHOST with your Mac IP address. If you have no ideas on how to find your Mac IP address, then follow this procedure because React-Native suggests you to do the same.


Tap on ifConfig and select it value under en0:

jsCodeLocation = [NSURLURLWithString:@“http://localhost:8081/index.ios.bundle”];


Now, your error is solved, you can move further towards Connecting to API hosted on a local development server.


In this step, you have successfully installed the app. So, your way to navigate your app on your iOS screen is open. Once you find that your app is trying to make an API call to the server that runs locally on your machine, then it is a problem. It is because it depends on the starting of the local server that has started.


Congratulations. You have successfully installed your React-Native App on your iPhone device.



Ways to Test React-Native Apps:

In this section, we like to share ways to test your React-Native Apps. Do not press back until you read this article till the end so you can get ideas for different ways to test your app. Let us go through these ways one-by-one so that you can get to know about them.


You might have a question in your mind that you should read this. So, let me clear this. There is some developer who wants to know different ways to test their iOS apps. So, we have included this topic so that they can understand.



Test Your React-Native App with The Help Of Calabash

Do you know that Calabash is known as one of the most user-friendly? Why? It is because everyone can understand it. It could surprise you that you can check applications for both Android and iOS through Calabash. However, there is a small condition that you must have written this application for both Android and iOS when you were writing scripts.


It is a development framework that has the behavior of cucumbers. It is popular because of its easy understandable interface and syntax among developers. Specifically, if you are not an expert in coding, then you can choose to test your React-Native App With the help of Calabash.



Test Your React-Native App with The Help Of Uiautomator

Do you know why developers trust this framework? No? It is because Google offers Uiautomator. It is different from other frameworks. However, from its second version (2.0), it followed Instrumentation but still works perfectly like any other frameworks that you use.


However, there is something not right with it. Uiautomator might not scale with precision and accuracy with all types of apps if they are working for Android OS, or developers have designed them for Android use.


Wrapping Up:

Could this article help you in testing your React-Native App on an iPhone? These are the best ways to fix the errors. All the steps are mentioned that you need to follow and try the app for yourself on an iOS device.


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