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Qt 如何根据combobox选择的值触发不同事件

in Technique[技术] by (71.8m points)

我想要根据用户选择的combobox的值来决定下面lineEdit的值和模式，但是用户也可以不更改combobox（即使用默认值），主要问题就在于程序不知道用户是否做出修改，什么时候修改的
我现在有两种解决方案但是感觉都不是很好
1.每0.1秒检测当前combobox的值
2.在combobox后面加一个Enter按钮，用户选完combobox的值，再点击Enter发出信号，触发槽函数


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by (71.8m points)

combobox自带信号curentTextChanged，当combobox的值发生变化时会发出此信号


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