今天写vfl自动给布局之时,出现了 invalid mode 'kCFRunLoopCommonModes' provided to CFRunLoopRunSpecific- break on _CFRunLoopError_RunCalledWithInvalidMode to debug. This message will only appear once per execution. 这个错误. 由于,vfl自动布局牵扯到非OC语言,因此Xcode不能详细反馈错误的地方. 这个时候不要…
Invalid row height provided by table delegate. Value must be at least 0.0, or UITableViewAutomaticDi 说明,row height 设置出问题了,不小心计算成了负值. 去 设置 rowHeight的代理方法里面找就行.…
错误原因:ld: x duplicate symbol for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) 在网上查了一下: duplicate symbol的大概意思是,编译器认为你重复定义了一些东西. linker command failed with exit code 1,则可能是项目引入了多个相同的文件. 结合本人开发中发现此类的…
Markup recommendations Each input has a label associated with it: The for-attribute of the label refers to the id-attribute of the input. 1 2 <label for="firstname">Firstname</label> <input id="firstname" name="fnam…