大概内容：
Failed to set (keyPath) user defined inspected property on (ProjectSecretary2.DateButton): [<ProjectSecretary2.DateButton 0x14ffd9be0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key keyPath.
莫名其妙。不经意间在DateButton的属性面板上看到这个：
这可能手滑加个一个参数，删掉
原文链接：https://www.f2er.com/swift/324204.html