就像Rob说的，还要检查“标识符”默认应该是“com.yourcompany”。我错误地更改了“yourcompany”，这导致了上面提到的相同问题。

这个解决方案不是技术性的，但对我来说很有效。

当attach to Process出现在xcode中并挂起一段时间时，就像iOS模拟器一样，按Command + R重新启动应用程序。

它将启动应用程序没有任何问题:)

对我有用的是:

启动“监视器”，杀死gdb-i386-apple-darwin 重启iOS模拟器

以下是我们的解决方案:

在项目>编辑方案>运行。

将调试器从GDB更改为None(正位于上图中绿色圆圈的上方)。

I was having this very annoying issue since a long time too. I've 3 different XCode versions installed and I'm not sure whether it's the reason or not that none of the above solutions worked for me. But here is the solution I finally found: I don't kill the running Simulator, I just try to launch it again using a Spotlight search, enter "Simu" and you should find it in Applications, then hit Enter. As it's yet running it will magically start my app that was frozen/locked/waiting for attachment. It works perfectly for me now and I hope it will also work for some (all?) of you.

顺便说一句，我用Cmd+空格来调用Spotlight，这样就可以非常快速地解冻模拟器而不使用鼠标。

只是遇到了同样的问题:重新启动模拟器和Xcode不适合我，而重新启动我的mac却很好!