blocks|key|4562233|text|确保您试图运行的项目的deployment+target等于或小于Xcode的SDK版本。在我的例子中，我试图运行一个使用iOS8.4构建的项目，但我使用的是Xcode6.1和SDK8.1版|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4562234|我将部署目标更改为8.1，它开始显示模拟器。|4562235|备注:在此之前，请确保您的代码和外部库与新的部署目标兼容，否则您必须更新您的Xcode。|4562236|entityMap^0|B|H|1P|6|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Q|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|R|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|K|$]]

Make sure that the project you are trying to run has <code>deployment target</code> equal to or less then the SDK version of your Xcode. In my case I tried to run a project which was built using <code>iOS8.4</code> but I have Xcode6.1 with SDK version 8.1

I changed the deployment target to 8.1 and it start showing me simulators.

P.S before doing this, make sure that your code and external libraries are compatible with your new deployment target, else you have to update your Xcode.

blocks|key|4562153|text|还要检查build+settings下的iOS+Deployment+Target。当部署目标设置为iOS+8.4时，我使用的是Xcode6.3。一旦我将其设置为iOS+8.3，我就得到了模拟器的列表|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4562154|📷|atomic|4562155|​|4562156|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/5c225e75bbf9dce8574a8049c4bea543.png|imageAlt^0|K|L|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|W|8|@]|D|@$9|X|A|Y|1|Z]]|E|$]]|$1|I|3|J|5|6|7|10|8|@]|D|@]|E|$]]|$1|K|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R|S|-4]]]]

Also check the <code>iOS Deployment Target</code> under build settings. I was using Xcode 6.3 while the deployment target was set to iOS 8.4. I got the list of simulators as soon as I set it to iOS 8.3
<img src="https://i.stack.imgur.com/7aFBG.png" alt="enter image description here">

blocks|key|4562305|text|在我的例子中，我不小心在system+Finder+->库->设备->核心模拟器中删除了ios设备|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4562306|因此，除了ios设备之外，模拟器没有列在Xcode项目中。|4562307|我通过从Xcode->Window->Devices->Add+simulators添加ios模拟器解决了这个问题|4562308|​|4562309|📷|atomic|offset|length|4562310|4562311|希望这能帮助到某个人。|4562312|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/15aa69c50cd941239367149f604d336a.png|imageAlt^0|0|0|0|0|0|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|11|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|12|8|@]|9|@$K|13|L|14|1|15]]|A|$]]|$1|M|3|G|5|6|7|16|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|17|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|Q|$R|$5|S|T|U|A|$V|W|X|-4]]]]

In my case i'd accidentally deleted ios devices in system Finder -> Library->Devices->Core simulator

So, the simulators are not listed in the Xcode project except ios device.

I solved this by adding ios simuulators from Xcode->Window->Devices->Add simulators

<a href="https://i.stack.imgur.com/MDuaD.png" rel="noreferrer"><img src="https://i.stack.imgur.com/MDuaD.png" alt="enter image description here"></a>

Hope it'll help someone.

blocks|key|4562968|text|对于那些来自Unity的人，即使你设法让他们出现(通过将Build+Settings+>+Supported+Platforms更改为iOS，它也不会在模拟器中运行。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4562969|相反，您需要选择此模拟器SDK：|4562970|​|4562971|📷|atomic|4562972|4562973|并确保除了Metal之外的其他东西存在。|4562974|4562975|4562976|4562977|那么模拟器设备列表将从一开始就在那里。|4562978|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/6c10e4dc6d7ba1eebe1e32fa29aaafd0.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/022db623d41f4e1300830c6f1b3c3208.png^0|S|10|1V|3|0|0|0|0|1|0|0|0|0|0|0|1|1|0|0|0^^$0|@$1|2|3|4|5|6|7|15|8|@$9|16|A|17|B|C]|$9|18|A|19|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1A|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|1B|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|1C|8|@]|D|@$9|1D|A|1E|1|1F]]|E|$]]|$1|M|3|I|5|6|7|1G|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|1H|8|@]|D|@]|E|$]]|$1|P|3|I|5|6|7|1I|8|@]|D|@]|E|$]]|$1|Q|3|K|5|L|7|1J|8|@]|D|@$9|1K|A|1L|1|1M]]|E|$]]|$1|R|3|I|5|6|7|1N|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|1O|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|1P|8|@]|D|@]|E|$]]]|V|$W|$5|X|Y|Z|E|$10|11|12|-4]]|13|$5|X|Y|Z|E|$10|14|12|-4]]]]

For those coming from Unity, even if you manage to make them show up (by changing <code>Build Settings &gt; Supported Platforms</code> to <code>iOS</code> it would not run in the simulator.

Instead, you need to select this Simulator SDK :

<a href="https://i.stack.imgur.com/itmuF.png" rel="noreferrer"><img src="https://i.stack.imgur.com/itmuF.png" alt="enter image description here"></a>

And make sure something other than Metal exist.

<a href="https://i.stack.imgur.com/eH14T.png" rel="noreferrer"><img src="https://i.stack.imgur.com/eH14T.png" alt="enter image description here"></a>

Then the simulator device list will be there from start.

blocks|key|4562815|text|解决方案:构建设置->架构->支持的平台:从iphoneos更改为iOS|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4562816|已确认在Xcode版本9.0+(9A235)中工作正常|4562817|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Solution:
Build Settings -> Architectures -> Supported Platforms:
changed from iphoneos to iOS

Confirmed works in Xcode Version 9.0 (9A235)

blocks|key|55698|text|转到窗口，然后设备，并按下左下角的加号按钮，添加一个设备，并选择模拟器，这是required.This工作为我。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|55699|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Go to Window then Devices and press the plus button at the bottom left to add a device and select the simulator which are required.This worked for me.

blocks|key|55640|text|签入项目的生成设置，确保选择最新的iOS+(iOS+8.1)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|55641|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

check in your project's build settings , make certain you select Latest iOS (iOS 8.1).

blocks|key|56833|text|将部署目标版本更改为较低版本对我很有帮助：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|56834|->+->设备和模拟器Window模拟器。查看现有模拟器的最新版本。|56835|​|56836|📷|atomic|offset|length|56837|56838|然后转到项目的Target。在Deployment+Info下，将Target更改为您在模拟器中看到的最新版本。当模拟器仅为iOS+13.5时，我的设置为iOS+13.6。|56839|56840|56841|56842|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/13914f56b0b3444e0056a18f80621106.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/0ecb83733af40202bd8791effed8ff22.png^0|0|0|0|0|1|0|0|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|12|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|13|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|14|8|@]|9|@$I|15|J|16|1|17]]|A|$]]|$1|K|3|E|5|6|7|18|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|19|8|@]|9|@]|A|$]]|$1|N|3|E|5|6|7|1A|8|@]|9|@]|A|$]]|$1|O|3|G|5|H|7|1B|8|@]|9|@$I|1C|J|1D|1|1E]]|A|$]]|$1|P|3|E|5|6|7|1F|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X|Y|-4]]|Z|$5|T|U|V|A|$W|10|Y|-4]]]]

Deployment Target version change to a lower one helped for me:
Window -&gt; Devices and Simulators -&gt; Simulators. Check what are the latest versions of existing simulators.
<a href="https://i.stack.imgur.com/kTPsx.png" rel="noreferrer"><img src="https://i.stack.imgur.com/kTPsx.png" alt="simulators" /></a>
Then go to your project's Target. Under Deployment Info, change Target to the version you saw the latest within your simulators. Mine was set to iOS 13.6 when the simulator was iOS 13.5 only.
<a href="https://i.stack.imgur.com/aCfuV.png" rel="noreferrer"><img src="https://i.stack.imgur.com/aCfuV.png" alt="deployment-target" /></a>

blocks|key|4562247|text|当窗口大小达到一定大小时，Xcode会隐藏该菜单。你必须让你的窗口变得很大，然后它才会回来。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4562248|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Looks like Xcode hides that menu when the window is a certain size. You have to make your window quite large before it comes back.

blocks|key|56059|text|非常Xcode，并再次打开它，它将显示。对我来说，它是有效的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|56060|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Quite Xcode and Open it again, it will show. For me it's worked.

blocks|key|4562995|text|如果您刚刚更新了Xcode，则可能需要重新启动计算机，然后模拟器才能再次可用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4562996|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If you just updated Xcode, you may need to restart your computer before simulators become available again.

blocks|key|4563384|text|如果您将Xcode更新到了12.1。完全退出Xcode，它将安装组件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4563385|​|4563386|📷|atomic|offset|length|4563387|4563388|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/93ef25a7022a857ee1452dea982eda08.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q|R|-4]]]]

If you updated Xcode to 12.1. Completely quit Xcode and it will install components.
<img src="https://i.stack.imgur.com/W5gd1.png" alt="enter image description here" />

blocks|key|55793|text|我遇到了另一种可能发生这种情况的情况。我和一个团队一起工作，我们使用Xcode服务器进行持续集成。服务器没有看到任何模拟器，但只看到一个项目的模拟器。我最终确定这是因为我们服务器上的Xcode版本是早一个版本，并且Xcode项目被设置为构建到可用的最新版本。简单地更新Xcode就为我们解决了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|55794|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I ran into another situation where this can occur. I work with a team we use Xcode server for continuous integration. The server wasn't seeing any simulators, but only for one project. I eventually determined that this was due to the fact that the version of Xcode on our server was one release earlier, and the Xcode project was set to build to the newest version available. Simply updating Xcode solved the issue for us.

blocks|key|55912|text|在更新了一个新的Xcode之后，我遇到了这种情况。正在运行|type|unstyled|depth|inlineStyleRanges|entityRanges|data|55913|xcode-select+--install|code-block|syntax|javascript|55914|帮我修好了。|55915|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I had this happen to me after an update to a new Xcode. Running

<pre><code>xcode-select --install
</code></pre>

fixed it for me.

blocks|key|4562458|text|只需转到Xcode+->窗口->设备|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4562459|单击左下角的%2B|4562460|添加新的模拟器|4562461|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Just go to Xcode -> Window -> Devices

Click + at the bottom left

Add your new Simulator

blocks|key|56409|text|我只需要一个很好的，老式的重启电脑。当卸载并重新安装XCode不起作用时，我从纯frustration....lo重新启动，你看！在重启之后，一切都是正常的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|56410|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I just needed a good, old fashioned restart the computer. When uninstalling and reinstalling XCode didn't do the job, I restarted out of pure frustration....lo and behold! After a restart, everything was as it should be.

blocks|key|4563034|text|升级到Xcode+10.3后，模拟器列表为空。我重启了，问题已经解决了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4563035|这并不一定能回答OP的具体问题，但这是我研究Xcode10.3升级问题的第一个地方。|4563036|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

After upgrading to Xcode 10.3, the list of simulators was empty. I rebooted and it was resolved. 

This doesn't necessarily answer the OP's specific question, but this was the first place I ended up in researching my Xcode 10.3 upgrade issue.

blocks|key|4563188|text|降低部署目标版本。例如，您将目标设置为Xcode13.4，但是您的iOS版本较低，并且没有安装iOS+13.4模拟器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4563189|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Lower the Deployment Target version. For example you have set the target as iOS 13.4 but your Xcode version is lower and there is no iOS 13.4 installed simulator.

blocks|key|4562660|text|我遇到了同样的问题，从一个导入的项目中生成，该项目将10.3作为部署目标，而我只安装了10.0，将部署目标更改为10.0解决了我的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4562661|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had the same issue, generated from an imported project, the project had 10.3 as deployment target and I only had 10.0 installed, changing the deployment target to 10.0 solved my issues.

blocks|key|4562721|text|对于任何在这个问题上苦苦挣扎的人，我尝试了上面提到的选项，但都没有成功。原来我所需要做的就是退出并重新启动Xcode。简单的事情有时会很烦人。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4562722|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

For anyone struggling with this, I tried the mentioned options without success. Turns out all I needed to do was just quit and relaunch Xcode. Simple things can be annoying sometimes.

blocks|key|4562768|text|在我的例子中，我在Xcode8.3.3中为tvOS创建了一个静态库目标，并且tvOS模拟器没有出现在列表中。最终发现构建设置中的TARGETED_DEVICE_FAMILY被设置为1,2而不是3。把这个留在这里以防其他人遇到同样的问题。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4562769|entityMap^0|1S|M|2I|3|2O|1|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

In my case I had created a static library target for tvOS in Xcode 8.3.3, and the tvOS simulator was not showing up in the list. Eventually found out that <code>TARGETED_DEVICE_FAMILY</code> in the Build Settings was set to <code>1,2</code> instead of <code>3</code>. Leaving this here incase anyone else encounters the same problem.

blocks|key|4563059|text|我只是简单地将Application文件夹中的Xcode文件重命名为其他名称，并将其重命名为Xcode。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4563060|成功了|4563061|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I simply Renamed my Xcode file in Application folder to something else and renamed it back to Xcode. 

Worked

blocks|key|56613|text|如果缺少iOS模拟器，请安装它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|56614|​|56615|📷|atomic|offset|length|56616|56617|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/cbcddcc70be6cbc8cb642060e13d85bb.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q|R|-4]]]]

Install iOS Simulator if you're missing one.

<a href="https://i.stack.imgur.com/S1UJL.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/S1UJL.png" alt="Click here to see how."></a>

blocks|key|4563151|text|没有什么对我有效，除了|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4563152|gem+install+snapshot

fastlane+snapshot+reset_simulators|code-block|syntax|javascript|4563153|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Nothing worked for me, except

<pre><code>gem install snapshot

fastlane snapshot reset_simulators
</code></pre>

blocks|key|4563335|text|在我的例子中，我认为我使用iOS框架模板创建了一个新项目，但我无意中选择了macOS框架模板。这阻止了我为iPhone模拟器构建项目。删除项目并重新创建它，这次选择iOS框架模板，修复了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4563336|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In my case I thought I created a new project using the iOS Framework template, but I inadvertently selected the macOS Framework template instead. This was preventing me from building the project for iPhone simulators. Deleting the project and recreating it, this time selecting the iOS Framework template, fixed the problem.

blocks|key|55883|text|检查xcode下的应用程序商店中是否显示GET而不是installed，删除当前版本并获取新版本|type|unstyled|depth|inlineStyleRanges|entityRanges|data|55884|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Check if in the app store under xcode it says GET instead of installed, delete your current version and get the new one

blocks|key|4562528|text|当我将我的xcode更新到8.2beta+(应用程序名为xcode-beta.app)时，我遇到了这个问题，我找到了Jeremy+Huddleston+Sequoia上面的答案，并尝试将xcode-beta.app重命名为xcode.app，它起作用了。我猜使用模拟器的名称应该是xcode.app，即使你在下载测试版时没有自己更改名称。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4562529|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I encountered this problem when I update my xcode to 8.2beta (with the app name xcode-beta.app), I found the answer above by Jeremy Huddleston Sequoia and tried to rename xcode-beta.app to xcode.app, it worked. I guess the name should be xcode.app to use the simulators, even if you didn't changed the name by yourself when you download the beta one.

blocks|key|4563458|text|在尝试了很多建议之后，下面的命令为我解决了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4563459|尝试重新启动模拟器服务：|4563460|sudo+killall+-9+com.apple.CoreSimulator.CoreSimulatorService|code-block|syntax|javascript|4563461|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

After trying a lot of suggestions, the below command solved the issue for me.
Try to restart the simulator service:
<pre><code>sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService
</code></pre>

I open my project in Xcode 6.1. When I try to run the project, the button is grayed out. When I try to go to <code>Product &gt; Clean</code>, the option is grayed out. When I look at the list of simulators, all I get is <code>My Mac</code> instead of the usually <code>iOS Device</code>. How do I get my simulators to come back?

Xcode project not showing list of simulators

服务器

Xcode

我在Xcode 6.1中打开我的项目。当我尝试运行该项目时，该按钮显示为灰色。当我尝试访问Product > Clean时，该选项显示为灰色。当我查看模拟器列表时，我得到的是My Mac而不是通常的iOS Device。我如何让我的模拟器回来？

问Xcode项目未显示模拟器列表
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