appium safari ios出现错误：环境不可用

我使用命令mocha ios-safari.js运行appium iphone测试，结果显示错误：

您请求的环境不可用

其中ios-safari.js示例下载自：

appium日志如下所示：

info: [debug] Error: Could not find a device to launch. You requested 

'iPhone 6 (8.1 Simulator)', 

but the available devices were: [
"iPad 2 (8.3 Simulator) [2F86D724-B8D6-4F22-B5E8-97B437C9ACFB]",
"iPad Air (8.3 Simulator) [8A07B826-AF59-4FC4-BC8E-21B37ADAF539]",
"iPad Retina (8.3 Simulator) [9C589CB6-1CF4-437E-83DB-1270DB1599FC]",
"iPhone 4s (8.3 Simulator) [31F567A4-5346-4E1A-B414-C45062105964]",
"iPhone 5 (8.3 Simulator) [E820B152-B5B4-4A79-B9DE-3A1F49859662]",
"iPhone 5s (8.3 Simulator) [5A07EBE7-264A-4571-BA9E-1F17C882ADE3]",

"iPhone 6 (8.3 Simulator) [58856942-BD3F-45C6-9B1B-93102851B37E]",

"iPhone 6 Plus (8.3 Simulator) 

---

由于我最近将X代码更新到了最新版本，似乎我应该将配置中的某个设备名称从iPhone 6 8.1模拟器更改为iPhone 6 8.3模拟器[58856942-BD3F-45C6-9B1B-93102851B37E]。但是我到底应该在哪里执行此操作-无法确定。

在启动Appium会话时指定目标设备。在命令行上，使用“-device name”参数。在Appium UI中，您可以在iOS选项卡中指定要安装的设备。我发现这个名字有点挑剔。我已经取得了最大的成功，在区分不同设备时尽可能地通用。请尝试“iPhone 6”或“iPhone 5 8.3模拟器”，而不是整个字符串。

我运行Appium UI，在iOS选项卡中没有设备名称的选择。您能写下完整的字符串吗？如何从具有-device name的控制台运行Appium？

info: [debug] Error: Could not find a device to launch. You requested 

'iPhone 6 (8.1 Simulator)', 

but the available devices were: [
"iPad 2 (8.3 Simulator) [2F86D724-B8D6-4F22-B5E8-97B437C9ACFB]",
"iPad Air (8.3 Simulator) [8A07B826-AF59-4FC4-BC8E-21B37ADAF539]",
"iPad Retina (8.3 Simulator) [9C589CB6-1CF4-437E-83DB-1270DB1599FC]",
"iPhone 4s (8.3 Simulator) [31F567A4-5346-4E1A-B414-C45062105964]",
"iPhone 5 (8.3 Simulator) [E820B152-B5B4-4A79-B9DE-3A1F49859662]",
"iPhone 5s (8.3 Simulator) [5A07EBE7-264A-4571-BA9E-1F17C882ADE3]",

"iPhone 6 (8.3 Simulator) [58856942-BD3F-45C6-9B1B-93102851B37E]",

"iPhone 6 Plus (8.3 Simulator)