Swift Learning Note (v)--enable console console output mode in background

As you can see in the previous introduction, using background in Xcode to learn Swift is very powerful, and it is very convenient to preview all of the constants or variable values in the code in real time in the interface on the right. But now we learn that Swift should appear as a console program, just like a beginner c,oc. All the printed results of the code can be displayed in the console console to distinguish between all previous parameter values being displayed together. However, the default open background is not called a console. What about that? The following is a brief description of how to open background.

(1) Open Xcode, select View-->assistant editor-->show Assistant Editor, or use the shortcut key Option+command+enter enter to bring up the console Output interface.

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(2) write a line of code and observe the effect of the console. The discovery console successfully prints out the results of the println () method, which is in line with our expectations.

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Swift Learning Note (v)--enable console console output mode in background