IOS Study Notes (I): Install the development environment and tools and the first IOS Application

①: The light green box on the top is the toolbar. We can do a lot of work through the buttons above. ②: the blue box is the navigation bar, with a navigation button in it. Select the content in our workspace. ③: the red box is the editing area of our code. Of course, there are also some attribute columns, information output columns at the bottom, and other areas that will be used later.

Bundle identifier: this is a sign that cannot be repeated. We need to use it when releasing an application.

Devices:

Use