2021-02-23

flutter NoMethodError - undefined method `size' for nil:NilClass错误排查

错误描述: pod install时发生错误

### Error

```
NoMethodError - undefined method `size' for nil:NilClass
/Library/Ruby/Gems/2.6.0/gems/ruby-macho-1.4.0/lib/macho/macho_file.rb:455:in `populate_mach_header'
/Library/Ruby/Gems/2.6.0/gems/ruby-macho-1.4.0/lib/macho/macho_file.rb:233:in `populate_fields'
/Library/Ruby/Gems/2.6.0/gems/ruby-macho-1.4.0/lib/macho/macho_file.rb:55:in `initialize_from_bin'
/Library/Ruby/Gems/2.6.0/gems/ruby-macho-1.4.0/lib/macho/macho_file.rb:33:in `new_from_bin'
/Library/Ruby/Gems/2.6.0/gems/ruby-macho-1.4.0/lib/macho/fat_file.rb:365:in `block in populate_machos'
/Library/Ruby/Gems/2.6.0/gems/ruby-macho-1.4.0/lib/macho/fat_file.rb:364:in `each'
/Library/Ruby/Gems/2.6.0/gems/ruby-macho-1.4.0/lib/macho/fat_file.rb:364:in `populate_machos'
/Library/Ruby/Gems/2.6.0/gems/ruby-macho-1.4.0/lib/macho/fat_file.rb:156:in `populate_fields'
/Library/Ruby/Gems/2.6.0/gems/ruby-macho-1.4.0/lib/macho/fat_file.rb:95:in `initialize'
/Library/Ruby/Gems/2.6.0/gems/ruby-macho-1.4.0/lib/macho.rb:31:in `new'
/Library/Ruby/Gems/2.6.0/gems/ruby-macho-1.4.0/lib/macho.rb:31:in `open'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/xcode/linkage_analyzer.rb:16:in `dynamic_binary?'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/sandbox/file_accessor.rb:171:in `block in vendored_dynamic_frameworks'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/sandbox/file_accessor.rb:170:in `select'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/sandbox/file_accessor.rb:170:in `vendored_dynamic_frameworks'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/sandbox/file_accessor.rb:179:in `vendored_static_frameworks'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/sandbox/file_accessor.rb:292:in `vendored_static_artifacts'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer/xcode/target_validator.rb:82:in `each'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer/xcode/target_validator.rb:82:in `flat_map'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer/xcode/target_validator.rb:82:in `block (2 levels) in verify_no_static_framework_transitive_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer/xcode/target_validator.rb:74:in `each_key'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer/xcode/target_validator.rb:74:in `block in verify_no_static_framework_transitive_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer/xcode/target_validator.rb:73:in `each'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer/xcode/target_validator.rb:73:in `verify_no_static_framework_transitive_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer/xcode/target_validator.rb:38:in `validate!'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer.rb:595:in `validate_targets'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/installer.rb:162:in `install!'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/command/install.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/command.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `<main>'
```

――― TEMPLATE END ――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――

[!] Oh no, an error occurred.

Search for existing GitHub issues similar to yours:
https://github.com/CocoaPods/CocoaPods/search?q=undefined+method+%60size%27+for+nil%3ANilClass&type=Issues

If none exists, create a ticket, with the template displayed above, on:
https://github.com/CocoaPods/CocoaPods/issues/new

Be sure to first read the contributing guide for details on how to properly submit a ticket:
https://github.com/CocoaPods/CocoaPods/blob/master/CONTRIBUTING.md

Don't forget to anonymize any private data!

Looking for related issues on cocoapods/cocoapods...
 -  NoMethodError - undefined method `size' for nil:NilClass
   https://github.com/CocoaPods/CocoaPods/issues/10426 [closed] [3 comments]
   a week ago

 - NoMethodError - undefined method `size' for nil:NilClass
   https://github.com/CocoaPods/CocoaPods/issues/10273 [closed] [3 comments]
   7 weeks ago

 - NoMethodError - undefined method `size' for nil:NilClass
   https://github.com/CocoaPods/CocoaPods/issues/8377 [closed] [24 comments]
   a week ago

and 8 more at:
https://github.com/cocoapods/cocoapods/search?q=undefined%20method%20%60size%27%20for%20nil&type=Issues&utf8=✓

解决办法：在flutter目录运行以下命令

flutter clean
rm -Rf ios/Pods
rm -Rf ios/.symlinks
rm -Rf ios/Flutter/Flutter.framework
rm -Rf ios/Flutter/Flutter.podspec

参考：https://github.com/CocoaPods/CocoaPods/issues/8377

2021-02-22

iOS

framework not found

问题：在build的时候framework not found

解决：

添加需要的framework
确定framework齐全的情况下，就是系统添加了冗余的framework编译需求，找到require列表删除即可

1	project.xcodeproj文件--->显示包内容--->project.pbxproj文件全局查找删除

ps:版本对不上处理方法同理，修改版本号和实际pods下载过来一致

2021-02-22

计算机

hexo部署文章到github 443问题

问题：

fatal: unable to access 'https://github.com/xxx/xxx.github.io.git/': LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to github.com:443 
FATAL {
  err: Error: Spawn failed
      at ChildProcess.<anonymous> (/Users/kevin/Desktop/xxx.github.io/node_modules/hexo-deployer-git/node_modules/hexo-util/lib/spawn.js:51:21)
      at ChildProcess.emit (events.js:315:20)
      at Process.ChildProcess._handle.onexit (internal/child_process.js:277:12) {
    code: 128
  }
} Something's wrong. Maybe you can find the solution here: %s https://hexo.io/docs/troubleshooting.html

解决：在_config.yml文件里把deploy的地址从http换成git

deploy:
  type: git
  #repo: https://github.com/xxx/xxx.github.io.git
  repo: git@github.com:xxx/xxx.github.io.git
  branch: master

2021-02-18

计算机

h5优化策略总结

原生webview加载耗时
- 预热webview，并且缓存多个对象进行复用
webview网络请求页面内容，下载html
- 在未点开网页时，用网络请求框架异步请求html内容，保存到本地缓存框架中
- 在移动端启动local web server，同步服务器资源到本地，h5链接替换成localhost+port链接，例如swift版本的Telegraph
- 本地网络框架请求zip资源并解压，供WKWebview的WKURLSchemeHandler拦截网络请求并调用(例如把http替换为自动以scheme)
解析html
- webview请求网络前先本地缓存查找已经下载好的html内容，直接进行加载渲染
请求js、css资源
- 本地网络框架选择性下载较大图片文件
正常页面加载顺序为拿到html，计算布局，识别外链资源，绘制渲染
- 后端直接加载好页面依赖的css，js和接口数据，拼接好一个最终版html返回给前端
接口耗时长
- 更新接口的处理方式
- 增加占位图，优化体验
内存泄露
- 及时释放图片和数组等资源

参考链接：

2021-01-27

flutter

融云iOS无法接受语音视频消息

安卓（李某测试）拨打苹果（李朴2），进入对话界面，

弹出键盘，弹出报错,在chat_room.dart文件中

[VERBOSE-2:ui_dart_state.cc(177)] Unhandled Exception: 'package:flutter/src/widgets/scroll_controller.dart': Failed assertion: line 112 pos 12: '_positions.isNotEmpty': ScrollController not attached to any scroll views.
#0      _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:46:39)
#1      _AssertionError._throwNew (dart:core-patch/errors_patch.dart:36:5)
#2      ScrollController.position (package:flutter/src/widgets/scroll_controller.dart:112:12)
#3      _ChatRoomState.didChangeMetrics (package:polars_app/pages/chat/chat_room.dart:708:27)
#4      WidgetsBinding.handleMetricsChanged (package:flutter/src/widgets/binding.dart:571:16)
#5      _rootRun (dart:async/zone.dart:1190:13)
#6      _CustomZone.run (dart:async/zone.dart:1093:19)
#7      _CustomZone.runGuarded (dart:async/zone.dart:997:7)
#8      _invoke (dart:ui/hooks.dart:251:10)
#9      _updateWindowMetrics (dart:ui/hooks.dart:53:3)

解决：在访问maxScrollExtent属性前一定要判断_scrollController.hasClients

1
2
3

if (_scrollController.hasClients) {
  _scrollController.position.maxScrollExtent;
}

问题描述：

//33003	调用接口时传入的参数不正确
[RC-Flutter-IM] iOS error sendMessage 33003
  
[VERBOSE-2:ui_dart_state.cc(177)] Unhandled Exception: NoSuchMethodError: The method '+' was called on null.
Receiver: null
Tried calling: +(":该消息内容为空，可能该消息没有在原生 SDK 中注册")
#0      Object.noSuchMethod (dart:core-patch/object_patch.dart:51:5)
#1      MessageFactory.map2Message (package:rongcloud_im_plugin/src/util/message_factory.dart:120:40)
#2      MessageFactory.string2Message (package:rongcloud_im_plugin/src/util/message_factory.dart:27:12)
#3      RongIMClient.sendMessageWithCallBack (package:rongcloud_im_plugin/src/rong_im_client.dart:187:43)
<asynchronous suspension>
#4      RongIMClient.sendMessageCarriesPush (package:rongcloud_im_plugin/src/rong_im_client.dart:116:12)
#5      RongIMClient.sendMessage (package:rongcloud_im_plugin/src/rong_im_client.dart:92:12)
#6      _ChatRoomState._sendMessage (package:polars_app/pages/chat/chat_room.dart:2765:32)
#7      _ChatRoomState._sendMessageClick (package:polars_app/pages/chat/chat_room.dart:2144:9)
#8      _ChatRoomState._buildTextComposer.<anonymous closure>.<anonymous closure> (package:polars_app/pages/chat/chat_room.dart:2097:29)
#9      _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:993:19)
#10     _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:1111:38)
#11     GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:183:24)
#12     TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:598:11)
#13     BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:287:5)
#14     BaseTapGestureRecognizer.acceptGesture (package:flutter/src/gestures/tap.dart:259:7)
#15     GestureArenaManager.sweep (package:flutter/src/gestures/arena.dart:157:27)
#16     GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:362:20)
#17     GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:338:22)
#18     RendererBinding.dispatchEvent (package:flutter/src/rendering/binding.dart:267:11)
#19     GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:295:7)
#20     GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:240:7)
#21     GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:213:7)
#22     _rootRunUnary (dart:async/zone.dart:1206:13)
#23     _CustomZone.runUnary (dart:async/zone.dart:1100:19)
#24     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1005:7)
#25     _invoke1 (dart:ui/hooks.dart:265:10)
#26     _dispatchPointerDataPacket (dart:ui/hooks.dart:174:5)

分析：

//走到这串代码
msg = await RongIMClient.send
//launch和login调用登录代码
  RyManager.instance.connect();
//方法内部调用  获取到的token为空
RongIMClient.connect(token)

无法连接融云，暂停；

继续调试

李朴2 userID：1174605640773193730

李某测试 userID：1107918162780569602

李某测试 (userID：1107918162780569602) android

打给

李朴2 (userID：1174605640773193730) iOS,锁屏超过一分钟

at 11:56

14：00 等待融云官方回复

app_helper——–>go web page ——->web view

2021-01-20

unix

ssh避免重复输入密码

解决方法：添加私钥

步骤：

切换到文件夹

cd ~/.ssh

添加秘钥

1	ssh-add id_rsa

查看秘钥

1	ssh-add -l

测试github仓库连接

1	git ls-remote -h -- git@github.com:zhangjk4859/jenkins-build-iOS.git

完。

参考：https://superuser.com/questions/988185/how-to-avoid-being-asked-enter-passphrase-for-key-when-im-doing-ssh-operatio

2021-01-20

unix

jenkins安装

安装
1
brew install jenkins-lts
启动
1
brew services start jenkins-lts
停止
1
brew services stop jenkins-lts
重启
1
brew services restart jenkins-lts
更新
1
brew upgrade jenkins-lts

局域网访问配置

homebrew.mxcl.jenkins.plist里面httpListenAddress从127.0.0.1更改为0.0.0.0

两个地方

~/Library/LaunchAgents/homebrew.mxcl.jenkins.plist
/usr/local/Cellar/jenkins/版本号/homebrew.mxcl.jenkins.plist

参考：https://www.jianshu.com/p/10041e79ac6f

2021-01-07

iOS

libstdc++缺失问题

问题：libstdc++ not found

原因：libstdc++ was deprecated 5 years ago,we should update project to use libc++

解决：更新工程或者下载库到当前工程，下载地址 https://github.com/zhangjk4859/zhangjk4859.github.io/raw/zjk/files/libstdc--master.zip 下载完成以后执行对应.sh文件即可

参考：1.https://github.com/devdawei/libstdc-

2.https://www.jianshu.com/p/e694782b8740

2021-01-07

iOS

Xcode12,iOS14，app启动慢

问题：启动app会白屏很长一段时间，即使是一个全新的app

解决方案：

In the Xcode menu,go to product > scheme > edit scheme
open the info tab
Uncheck the debug executables checkbox

参考：1. https://stackoverflow.com/questions/63929122/slow-app-launch-time-after-updating-to-ios-14-and-xcode-12

2.https://developer.apple.com/forums/thread/651012

2021-01-07

unix

Mac环境下朗文词典

原理：原生的dictionary加朗文的词库，词库需要转换，转换过程见参考链接2

参考：1. https://www.zhihu.com/question/21964466

https://kaihao.io/2018/mdict-to-macos-dictionary/

3.https://www.zhihu.com/question/20428599/answer/223511099

原生webview加载耗时

webview网络请求页面内容，下载html

解析html

请求js、css资源

正常页面加载顺序为拿到html，计算布局，识别外链资源，绘制渲染

接口耗时长

内存泄露