I don't have the rep yet to leave a comment, but I upvoted some answers here and wanted to say more. I had a problem with slow animations in the iOS Simulator, especially on rotation, and I found this post via Google. Indeed, somehow "Toggle Slow Animations" must have been on, because three shifts fixed it. At first, I didn't think this was a problem because there's no checkmark next to "Toggle Slow Animations." It turns out there's never a checkmark, or any indication from the menu whether it's on or off. So just try toggling it and see if the rotation/navigation is faster/slower.

所以，谢谢大家!

使用模拟器时，在调试时不小心按下了慢动画。 运行模拟器->调试->取消选中慢速动画。

选择模拟器,

选择调试，取消选中慢动画。 快捷方式 Command + t

那是我的工作。

当chrome调试是活动的，浏览器选项卡不在前台，模拟器也很慢。对我来说，我决定把指南放在前台。

转到模拟器的Debug菜单并选择“Toggle Slow Animations”。

更新:在Xcode 10中，它只是“慢动画”:

您可以尝试关闭远程调试(Cmd-D ->停止远程JS调试)。这通常会加快速度。