出现此问题真是奇葩，新建工程也是此问题，搜了没发现有人解决，解决方法也不难，就是有时没想到这么做。
在Qt creator中，右键项目---》执行qmake，生成即可
详细解决方案
【Qt----creator】mainwindow.ui does not exist
热度：56 发布时间：2023-12-15 22:58:51.0
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