1.使用Xcode遇到的问题
xcode-select: error: tool 'instruments' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance
解决方法：
报这个错误的原因是xcode-select不在默认的路径
a).找到xcode-select的当前路径终端命令行
xcode-select --print-path
/Library/Developer/CommandLineTools
b).设置xcode-select到指定位置
sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer/
c) .验证是否设置成功
xcode-select --print-path
/Applications/Xcode.app/Contents/Developer
2. 查看设备列表
instruments -s devices
3.查看设备udid
xcrun simctl list
4. 'RoutingHTTPServer/RoutingConnection.h' file not found'报错
问题一：出现'RoutingHTTPServer/RoutingConnection.h' file not found,编译错误.
问题二：xcodebuild failed with code 65
解决处理方法：
4.1.cd /Applications/Appium.app/Contents/Resources/app/node_modules/appium-xcuitest-driver/WebDriverAgent
4.2.在wda根目录下,输入sh ./Scripts/bootstrap.sh下载依赖，wda重新编译
4.3.重新build了project后，就没有报错了
5. WebDriverAgent/Carthage/Build/iOS/RoutingHTTPServer.framework/Headers/RouteResponse.h:8:1: 'assign' property of object type may become a dangling reference; consider using 'unsafe_unretained'
解决方法:
@property (nonatomic, assign, readonly) HTTPConnection *connection;
修改为：@property (nonatomic, strong, readonly) HTTPConnection *connection;
6. WebDriverAgent/WebDriverAgentLib/Routing/FBWebServer.m:12:9: Could not build module 'RoutingHTTPServer'
解决方法:
@property (nonatomic, assign, readonly) HTTPConnection *connection;
修改为：@property (nonatomic, strong, readonly) HTTPConnection *connection;
7. Simply open WebDriverAgent.xcodeproj and start WebDriverAgentRunner test, Using xcodebuild
命令为：xcodebuild -project WebDriverAgent.xcodeproj -scheme WebDriverAgentRunner -destination 'platform=iOS Simulator,name=iPhone 11 Pro Max' test
8. testrunner failed: WebDriverAgent/<unknown>: failed: caught "NSInvalidArgumentException", "-[UITestingUITests internalImplementation]: unrecognized selector sent to instance 0x600003c32580"; 此问题通过降低xcode版本解决的，使用最新的xcode版本遇到的问题实在无法解决了；
9. xcodebuild -project WebDriverAgent.xcodeproj -scheme WebDriverAgentRunner -destination ‘platform=iOS,id=CD7A3E92-9C32-4428-9765-CF99FE14DB10’ test
xcodebuild -project XCTestWD.xcodeproj -scheme XCTestWDUITests -destination id=D45009A8-A070-A7811C, OS=13.3 XCTESTWD_PORT=8001 clean test
结果： xcodebuild: error: option 'Destination' requires at least one parameter of the form 'key=value' ， 处理结果：在xcode 11.3.1中应去掉单引号；
10. 命令行执行WebDriverAgentRunner, xcode版本->11.3.1
xcodebuild -project WebDriverAgent.xcodeproj -scheme WebDriverAgentRunner -destination id=CD7A3E92-9C32-4428-9765-CF99678900, OS=13.3 test
11. App Inspector-ios Macaca:
npm i -g macaca-cli macaca-ios # 安装命令行工具和驱动模块
macaca run # 运行即可
12. npm转cnpm下载(npm下载较慢，转cnpm国内下载很快)：
npm install -g cnpm --registry=https://registry.npm.taobao.org
13. Test XCTestWDUITests
xcodebuild -project XCTestWD.xcodeproj -scheme XCTestWDUITests -destination id=D45009A8-A070-4E6F-84FD-D6744EA7811C, OS=13.3 XCTESTWD_PORT=8001 clean test
14. Macaca捕获页面元素
app-inspector -u udid
15. 关闭系统显示“其他”用户的设置
sudo defaults write /Library/Preferences/com.apple.loginwindow SHOWOTHERUSERS_MANAGED -bool FALSE16. 使用app-inspector 报错: Error: connect ECONNREFUSED 127.0.0.1:8001
解决方法: npm config set proxy null
17. Failed to create WDA session (An unknown server-side error occurred while processing the command. Original error: 'bundleId' desired capability not provided
18. An unknown server-side error occurred while processing the command. Original error: No Chromedriver found that can automate Chrome '81.0.4044'. See https://github.com/appium/appium/blob/master/docs/en/writing-running-appium/web/chromedriver.md for more details. You could also try to enable automated chromedrivers download server feature
解决方法（http://npm.taobao.org/mirrors/chromedriver）：
把最新版的chromedriver放置到：\node_modules\appium\node_modules\appium-chromedriver\chromedriver\mac 即可解决问题；
19. ideviceinstaller -l
Could not connect to lockdownd. Exiting
解决方法：
brew uninstall -f libimobiledevice ideviceinstaller usbmuxd如果命令被拒绝，可根据提示，更新命令：
brew uninstall --ignore-dependencies libimobiledevice ideviceinstaller usbmuxd