让xcode9.1支持iOS11.2，，不能设置免费了。。。xcode11.2https://pan.baidu.com/s/1i4Yit5j执行:sudocp-r/Users/ios-dev/Downloads/11.2\\(15C5097c\)/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/support文件路径：/Users/ios-dev/Downloads/11.2\\(15C5097c\)xcode路径：/Applications/Xcode.app/Contents/Developer/Plat