以前用XAMPP的时候就是自然而然装好了就可以用,最近重装了新系统,打算在Windows 10里面配置Apache tomcat.PHP.MySQL的开发环境,迟迟试验不成功,于是直接用了XAMPP,没想到也报错,尴尬至极下定决心要解决这个问题. 这是报错提示:Make sure you have Java JDK or JRE installed and the required ports are free 想到这个start应该是启动了tomcat相关的一个命令行脚本,于是我跑到tomca…
该错误信息是我在一个.h文件里申明了公共变量,然后在其他类里重复使用. Build Settings ->No Common Blocks默认为YES,编译器就报错了,需要修改Build Settings里的No Common Blocks为NO. NO Common Blocks 是什么? 官方的解释是: In C, allocate even uninitialized global variables in the data section of the object file, rath…
post 请求,headers里有属性(xxx).请求时报错: XMLHttpRequest cannot load <url>. Request header field xxx is not allowed by Access-Control-Allow-Headers in preflight response. 解决:在后端的Access-Control-Allow-Headers里,添加该 field.…
1.连了手机热点 fix Issue后出现提示框:No Devices Registered:Creating a provisioning profile requires one or more devices to be registered with your team. Connect a device to your Mac to add it to your team. 公司内网各种限制 以为是网络问题又试着改了bundle id发现并不是,原来Xcode左上角设备那一项没选中自…