解决Xcode 10.3安装错误：Assets.xcassets:-1: Failed to find a suitable device for the type IBSimDeviceTypeiPad2x

升级XCode到10.3时报错，错误信息如下：

: error: Failed to find a suitable device for the type IBSimDeviceTypeiPad2x (com.apple.dt.Xcode.IBSimDeviceType.iPad-2x) with runtime iOS 12.4 (12.4 - 16G73) - com.apple.CoreSimulator.SimRuntime.iOS-12-4

Failure Reason: Failed to create new simulator device that matches IBSimDeviceTypeiPad2x (com.apple.dt.Xcode.IBSimDeviceType.iPad-2x) for runtime iOS 12.4 (12.4 - 16G73) - com.apple.CoreSimulator.SimRuntime.iOS-12-4 (Invalid runtime: com.apple.CoreSimulator.SimRuntime.iOS-12-4)

Underlying Errors:

Description: Invalid runtime: com.apple.CoreSimulator.SimRuntime.iOS-12-4

最终在Stackoverflow上找到了解决方案。

方案一：

重启MacOS电脑，问题就不知道什么原因就解决了。这是很粗暴直接的方式。

方案二：

kill掉模拟器进程，命令如下：

$ sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService

接着设置xcode path：

$ sudo xcode-select -s  /Applications/Xcode.app/Contents/Developer

如果还不行，重启模拟器

$ xcrun simctl erase all