Qt Creator报错 No such slot

最新推荐文章于 2024-11-08 11:47:16 发布

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最新推荐文章于 2024-11-08 11:47:16 发布

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分类专栏： Qt 文章标签： qt 开发语言

本文链接：https://blog.youkuaiyun.com/nature_Chen_/article/details/128701525

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在Qt编程时遇到Nosuchslot错误通常是由于槽函数定义问题导致的，如槽函数未放置在slots:里面，不是接收对象的成员方法，或者缺少Q_OBJECT宏声明。即使代码能编译，也可能在运行时因为未声明的槽函数收到错误提示。

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错误日志：QObject::connect: No such slot

再用Qt Creator编码的时候出现 no such slot 的错误，经查阅后发现有以下几种可能：

槽函数没有放在slots:里面
槽函数不是connect的第三个参数（也就是receiver信号接收的对象）的成员方法
没有Q_OBJECT宏
压根没有声明这个槽函数（Creator里没有声明槽函数可以正常编译，打印输出会有错误提示）

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