PyQt组合框更改标签的值

2022-01-12 00:00:00 python python-3.x user-interface pyqt5

问题描述

我正在使用 PyQt5 为项目制作 UI.

I'm using PyQt5 to make a UI to a project.

当用户更改组合框的值时，我想更改标签的值.

I want to change the value of a label when the user changes the value of a combo box.

谁能帮我找出用来触发"改变标签值的函数的方法?

Can anyone help me to find out wich method to use to 'trigger' the function that changes the value of the label ?

解决方案

如果是combo box的信号，当它的值改变时，可以使用

If you mean the signal of combo box, when it's value changed, you can use

QComboBox.currentTextChanged

或

QComboBox.currentIndexChanged

每次用户更改组合框时，都会触发这些信号.

Everytime a combobox is changed by user, these signals will be triggered.

假设 cb_1 是您的组合框父/小部件类中的一个简单函数，例如

Suppose cb_1 is your combobox a simple function in you parent/widget class like 

def on_combobox_changed(self, value):
    print("combobox changed", value)
    # do your code

只是

cb_1.currentTextChanged.connect(self.on_combobox_changed)

尝试更改组合框，看看会发生什么

try to change the combobox and see what will happen

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