What is Unity 3D ?
​Answer:
It is a  multiplatform game engine which gives outof-box functionality to developing best 2d and 3D  games as well as non-game interactive simulations and visualizations.

Apple introduced a grand addition in September 2017 event known as iPhone X or iPhone 10.
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Let's highlight some some ultimate features.

 If you are planning to upgrading your phone, you are likely to be curious to know  how the new model will suit you best.

if we run a device with iOS version (10.3), which may not be supported by the version of Xcode(8.2.1).It shows an alert with warning "Could not find Developer Disk Image".

It clearly indicates that you must have to update your Xcode (8.2.1) to Xcode(8.3).It's really hectic way to download such a heavy file within a short period of time and meet your project deadline. 

Remote notification or push notifications play a vital role in mobile apps to inform users about some new content or updates.

They are used to promote your mobile apps and to increase user retention .

Here is the big challenge for the developers to grant a requested permission from the app user, should the user allow or disallow notifications.

2017 is the year of billions of smartphone users.Now the major problem with app developers are they are techies and not a marketer. As a developer,it’s very tough to understand your audience’s behaviour and the secrets of App Marketing.
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You’ve developed a nice app, and now it’s already live in the App Store.The you need to think: How can you make people easy to discover it ?

when we have our NSDate object and we can compare it to another NSDate and get an NSTimeInterval which is the difference in seconds.
​I think we can use  a category to evaluate some results.
In order to compare two dates please follow the below steps:

Local notifications are best way to retain user in your game or app.It gives  alert to users via app that might not be running.
Local notifications can be scheduled at the time when user's app is running in foreground or background.You just need to schedule notification to be triggered at a specific time, It's the system who manages to deliver it at appropriate time.

You must have observed that since iOS 11, the App's "App Icon" asset in the catalog requires a 1024x1024 sized icon to submit your app to the App Store review.
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If we look into the apple's guideline for metadata of a particular app,1024x1024 icon was mandatory to upload in iTunesConnect app page.
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Can we get that icon from iTunes app page?

Step1:
Pair a wireless device with Xcode (iOS)
First of all, you need to pair your device with Xcode in order to launch your app on a wireless device.
The required configurations for debugging your app on network device are (Xcode 9.0 or later running on macOS 10.12.4 or later, and on the device, requires iOS 11.0 or later, or tvOS 11.0 or later)