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widget - flutter 错误 : "Widget cannot build because is already in the process of building"

我遇到了这个错误:I/flutter(29346):══╡EXCEPTIONCAUGHTBYWIDGETSLIBRARY╞═══════════════════════════════════════════════════════════I/flutter(29346):ThefollowingassertionwasthrownbuildingMainLogic(dirty,state:_MainLogic#9c794):I/flutter(29346):setState()ormarkNeedsBuild()calledduringbuild.I/flutter(29346):T

widget - flutter 错误 : "Widget cannot build because is already in the process of building"

我遇到了这个错误:I/flutter(29346):══╡EXCEPTIONCAUGHTBYWIDGETSLIBRARY╞═══════════════════════════════════════════════════════════I/flutter(29346):ThefollowingassertionwasthrownbuildingMainLogic(dirty,state:_MainLogic#9c794):I/flutter(29346):setState()ormarkNeedsBuild()calledduringbuild.I/flutter(29346):T

docker启动报错:Job for docker. service failed because the control process exited with error code

目录启动docker报错:1.通过命令进入/etc/docker文件目录: 2.修改文件名3.重启动docker启动docker报错:Jobfordocker.servicefailedbecausethecontrolprocessexitedwitherrorcode.See"systemctlstatusdocker.service"and"journalctl-xe"fordetails.通过在网上查找资料并尝试,终于找到了解决方法。1.通过命令进入/etc/docker文件目录:命令:cd/etc/docker 查看该目录下是否有daemon.json这个文件;这个文件是我们在安装时

【Python】Fatal error in launcher:Unable to create process using list(pip安装第三方模块时常见问题)

  一般会在cmd中输入pip指令时出现。(如下图)  其它博主推荐的"python-mpipinstall"方法如果没有用,那大概率是因为电脑存在多个版本的Python环境,此时唯一解决手段就是将所有版本的Python全部卸载干净,然后再重新安装某一个版本的Python即可。  具体操作如下:1、"win+R"打开"运行"对话框,输入"control",回车,点击"程序和功能",卸载Python。补充说明:如果删除Python时提示"Setupfailed""0x80020643-安装时发生严重错误"。直接在卸载界面右击Python,选择"更改",点击"Repair",即可解决此问题。2、这

Post-processing of merged bean definition failed; spring cloud Eureka 启动报错

启动Eureka报错Post-processingofmergedbeandefinitionfailedmergedbean过程又错这时候要检查一下Eureka版本和SpringBoot的版本对不对得上,我现在SpringBoot版本是version>2.7.0/version>Eureka版本是version>2.2.2.RELEASE/version>这样报错很正常版本不兼容,把Eureka版本改成3.1.2就可以正常启动了具体版本对应关系可以参考下官方文档报错细节org.springframework.beans.factory.BeanCreationException:Errorc

【Appium】Failed to create session. An unknown server-side error occurred while processing the command

报错信息:Error:Command'D:\\Programe\\AndroidSDK\\platform-tools\\adb.exe-P5037-sb88041a1install-g'C:\\Users\\zzy\\AppData\\Local\\Programs\\AppiumServerGUI\\resources\\app\\node_modules\\appium\\node_modules\\io.appium.settings\\apks\\settings_apk-debug.apk''exitedwithcode1Failedtocreatesession.Anunknow

Kali自带密码字典rockyou.txt解压

引言近期使用了airmon-ng进行wifi密码破解,虽然抓到了包,但是由于kali自带wifite.txt太弱,未能匹配出密码,因此我使用了rockyou.txt。起初rockyou.txt是未解压的状态,名称为rockyou.txt.gz,位于/usr/share/wordlists文件夹中。此处只说明其解压方法,有效性另说。一般来说破译需要针对性的字典,而不是数据量庞大的字典,毕竟计算机计算能力是有限的。另外,如果想建立自己专属的密码字典,可以尝试使用crunch工具。方法第一步首先我们要知道rockyou.txt文件压缩包的位置,其实在引言中已经提到了/usr/share/wordli

process has died 报错

报错提示:UnicodeEncodeError:'ascii'codeccan'tencodecharactersinposition345-350:ordinalnotinrange(128)[spawn_model-3]processhasdied[pid5767,exitcode1,cmd/opt/ros/melodic/lib/gazebo_ros/spawn_model-urdf-modelcar-paramrobot_description__name:=spawn_model__log:=/home/ren/.ros/log/7bb0d8dc-e373-11ed-a35d-0c9

Ubuntu下面创建文本文档.txt

第一步:在主目录下找到模板文件夹;第二步::在模板文件夹下右键(选择在终端中打开)第三步:在终端中输入:sudogedit新建文本文档.txt,然后输入密码即可;第四步:在新建文本文档.txt右上角点击保存即可;第五步:即可在任意位置新建文本文档.txt

python - 打包在 requirements.txt 中,但在 docker 中看不到

我有有效的requirements.txt文件,但docker没有安装requirements中列出的包之一Docker版本18.09.2python3.7.3需求.txtdjango==2.2.2celery==4.2.1selenium==3.141.0BeautifulSoup4==4.7.1redis==3.2.0docker文件FROMpython:3.7ENVPYTHONUNBUFFERED1ENVDJANGO_ENVdevENVDJANGO_ENVdevCOPY./requirements.txt/code/requirements.txtRUNpip3install--