IOS---Jump __ios between two apps

1, first we will create the first single application, named Firstapp.

Here's a quick explanation, language says that the project we created is based on objective-c, and that I will follow the tutorials based on Swift.
Devices said the project we created ran on top of the platform, and Universal said the project would work on both the iphone and the ipad.

The directory after the project is created is this:

All we need to do is change the viewcontroller.m file:

In the Clickbutton function, secondeapp://is the URL of our second app schemes.
Next, we add the URL schemes to Firstapp:


Select our project, in the middle column to select Info, in the URL types inside click "+" to add URL schemes. URL schemes just write the name of our project on the line. Identifier wrote the logo of our app. The following figure:


The next step is to create the Secondapp, which is exactly the same as Firstapp, Secondapp add URL schemes.

With two apps running on top of our phone, click on the button to see two apps jump to each other.