Flutter Error (Xcode): unable to

今天Flutter项目打包iOS的时候遇到了这样一个错误

 Failed to build iOS app
[        ] Error (Xcode): unable to open configuration settings file

/Users/jagtu/Documents/WorkSpaces/flutter/other/jdyun-woyinxiang-app/trunk/wo_yi
           nxiang/ios/Flutter/Release.xcconfig:0:0
           
[        ] Error (Xcode): Unable to load contents of file list: '/Target Support

Files/Pods-Runner/Pods-Runner-frameworks-Release-input-files.xcfilelist'
           
[        ] Error (Xcode): Unable to load contents of file list: '/Target Support

Files/Pods-Runner/Pods-Runner-frameworks-Release-output-files.xcfilelist'
           
[   +1 ms] "flutter ios" took 22,460ms.
[   +1 ms] Encountered error while building for device.
[        ] 
           #0      throwToolExit
(package:flutter_tools/src/base/common.dart:10:3)
           #1      _BuildIOSSubCommand.runCommand
           (package:flutter_tools/src/commands/build_ios.dart:665:7)
           <asynchronous suspension>
           #2      FlutterCommand.run.<anonymous closure>
           (package:flutter_tools/src/runner/flutter_command.dart:1336:27)
           <asynchronous suspension>
           #3      AppContext.run.<anonymous closure>
           (package:flutter_tools/src/base/context.dart:150:19)
           <asynchronous suspension>
           #4      CommandRunner.runCommand
(package:args/command_runner.dart:212:13)
           <asynchronous suspension>
           #5      FlutterCommandRunner.runCommand.<anonymous closure>
           (package:flutter_tools/src/runner/flutter_command_runner.dart:296:9)
           <asynchronous suspension>
           #6      AppContext.run.<anonymous closure>
           (package:flutter_tools/src/base/context.dart:150:19)
           <asynchronous suspension>
           #7      FlutterCommandRunner.runCommand
           (package:flutter_tools/src/runner/flutter_command_runner.dart:244:5)
           <asynchronous suspension>
           #8      run.<anonymous closure>.<anonymous closure>
           (package:flutter_tools/runner.dart:91:9)
           <asynchronous suspension>
           #9      AppContext.run.<anonymous closure>
           (package:flutter_tools/src/base/context.dart:150:19)
           <asynchronous suspension>
           #10     main (package:flutter_tools/executable.dart:91:3)
           <asynchronous suspension>
           

解决办法：

先确定在项目目录/ios/Flutter目录下，是否有Debug.xcconfig、Release.xcconfig
如果有少了就要添加，如果有的话，就确定一下内容，正确内容应该如下：

Release.xcconfig

#include? "../Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
#include "Generated.xcconfig"

Debug.xcconfig

#include? "../Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
#include "Generated.xcconfig"