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。

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。

我认为你错误地按了command + T而不是command + R。

进入模拟器菜单 Device ->重启

然后一切都比你想象的快-_-

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!

如果Cmd-T(慢动画)选项不适合您，并且调试->慢动画是关闭的，但您仍然有慢动画，请尝试模拟器->重置内容和设置(或可能是硬件->擦除所有内容和设置)。这里的其他答案都没用的时候，这个答案对我有用。有人知道为什么吗?

此外，附加调试器(完全)可能会使动画非常缓慢。