写了那么多的代码了,平时也没有怎么注意会报这个错误,因为平时都很少同时重写setter和getter方法,一般的话,我们大概都是使用懒加载方法,然后重写getter方法,做一个非空判断.然后有时候根据需求,要同时重写属性的setter和getter方法.系统就会报错误::Use of undeclared identifier '_name';did you mean 'name' MARK:如果不想了解太多,直接的解决方法: 在@implementation 实现中添加一行代码就OK了 @sy…
Searching MSDN for that constant brings up one result: it's a failure code for SetFilePointer() and is defined in winbase.h, which is included in any project that includes windows.h. That's the latest information. However, I've got VC++ 6.0 and the d…
A property is not the same thing os a instance variable, you should read a little bit of them, there's plenty of sources in the internet. Summarizing, a property is the combination of the instance variable (by default, automaticated declaraded with a…
未识别错误,是因拼写错误或找不到定义文件. 下面列举一些类型和函数用到的单元. _Stream ADODB_TLB akTop, akLeft, akRight, akBottom Controls Application (the variable not a type) Forms Beep SysUtils or Windows (different functions) CGID_EXPLORER ShlObj CN_BASE Controls CoInitialize ActiveX…
------------------------------------------------------------------------------ In :: fdiskbsdlabel.h::: error: #error unknown architecture fdiskbsdlabel.c: In function 'bselect': fdiskbsdlabel.c::: error: 'BSD_LABELSECTOR' undeclared (first use in th…
错误信息 namespaces.c: In function ‘setns’: namespaces.c:: error: ‘SYS_setns’ undeclared (first use in this function) namespaces.c:: error: (Each undeclared identifier is reported only once namespaces.c:: error: for each function it appears in.) make[]:…