最近我经历过,Xcode 的模拟器变得非常慢。另外,如果我创建一个新的应用程序并运行它 i,启动屏幕和第一个视图控制器之间的转换大约需要3秒钟。幸运的是,它只是 iOS9模拟器,而不是 iOS8或更低版本。 I have upgraded to Xcode 6.4 and I also have Xcode 7.0 beta 3 installed. Has anyone experienced the same? I have tried to uninstall both Xcode versions, but it didn't help.