如何在QtDesigner中设置拉伸比例？含QSplitter控件设置方法

Hey there! Let's break down your two questions about Qt Designer step by step:

If you're referring to setting stretch factors for widgets inside a layout (like QHBoxLayout or QVBoxLayout), here's the straightforward way to do it in Qt Designer:

• First, ensure your widgets are already nested inside a layout. If not, right-click the parent widget and pick a layout from the "Layout" menu to wrap them.
• Select the layout itself—you can click its border in the design view, or locate it in the left-side Object Tree panel.
• Switch to the Property Editor on the right. Look for the layoutStretch property.
• Click the tiny edit button (the one with three dots) next to it. A dialog will pop up where you can input comma-separated numbers. Each number corresponds to the stretch factor of the widgets in the layout, in their order. For example, entering 2,1 means the first widget will take twice as much space as the second when the window is resized.

Alternatively, you can select a single widget in the layout, find its individual layoutStretch property, and set the value directly. But using the layout's layoutStretch is more efficient for configuring all factors at once.

Ah, that comma-separated property you remembered is exactly what we need here! Here's how to set it up:

• First, add all your target widgets to the QSplitter—drag them into the splitter in the design view, or use the Object Tree to reparent them under the QSplitter.
• Select the QSplitter widget itself.
• In the Property Editor, look for the stretchFactors property.
• Click the edit button to open the configuration dialog, then enter comma-separated numbers that match the order of your widgets in the QSplitter. For example, 3,2,1 will make the first widget take 3 parts of available space, the second 2, and the third 1 when the splitter is resized.

Another handy method: Right-click the QSplitter, hover over "Edit Stretch Factors", and adjust the value for each widget in the submenu that pops up. This is great if you only want to tweak one widget's factor without touching the others.

A quick reminder: Stretch factors define how extra space is distributed when the splitter is resized—they don't set fixed widths or heights, just the proportional allocation of additional space.

内容的提问来源于stack exchange，提问作者Ufx