Qt creator the first program QT learning notes chapter 3

Okay. Now we are working.

Open the QT creator tool and select "file" and "new file or project"

 

There are multiple types of projects and files. Here we are mobile development.

Select "mobile application" on the right of "QT Control Project"

Click "select" and the configuration will pop up, for example:

Enter the project name and file path, and click Next to select a device:

There is an introduction before, and I will not talk about it here. Next, next:

The icon here is in SVG format. If you have one, change it. The following target uid3: This is the ID of the program. In the mobile phone, the corresponding file will be created, for example: e2433b13.

There are no questions here. Well, next step.

Select the icon and click Next.

In this way, the project is established.

 

There is a UI, and I am working on C #. This vs has similar effects and is visualized. When a newbie comes in, this UI is still quite good. However, this interface is not very good in the mobile phone. Let's look at the examples. Basically, the interface is displayed in the code area, here we will first use this interface, which looks ugly.

Now, start a hello World:

 

Drag a label from the control on the left and double-click the control to edit the displayed text. Then, change the font size in the attribute on the right. The final result is as above.

Then, press Ctrl + 2 to switch to "edit", set the current project as the startup item, and click "run" in the lower left corner to see the effect. Now we use a virtual machine.

The result is displayed. For more information, see the description in the figure. In this figure, we can see that the text displayed on the mobile phone screen is incomplete. This is because of the pixel size of the interface. Well, let's change it.

Pull lable a little wider.

OK, hello World is out.

This chapter is here first. Others, you can try it yourself.