iOS Expected unqualified-id 和 Unkown type name 'NSString'
2017-03-25 16:08
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iOS使用到OC与C++混编的时候刚把C++的类拖入工程编译, NSObjCRuntime与NSZone就报错:
Expected unqualified-idUnkown type name ‘NSString’
Unkown type name ‘Protocol’
错误提示如下
解决方案:
修改你的.pch(项目头文件)将所有的import与define的代码全部放在#ifdef [b]OBJC[/b]与#endif 之间, 如下我将所有的define与import代码放入了一个.h头文件中, 然后在这中间导入头文件.
#ifdef __OBJC__ #import "DefineAndImport.h" #endif // OC的头文件
个人理解
这是因为将C++拖入项目之后, 默认编译会先编译C++类, 编译之后导入OC的类的时候, 编译的场景是C++, 所以会出现unknown type的报错, 使用了#ifdef [b]OBJC[/b]与#endif 之后, 就相当于说着中间的定义与导入时OC环境. 从而规避掉了报错, 理解有偏颇, 告诉我 QQ508955426 另外感谢, 阿福的专栏blog给予我的帮助.相关文章推荐
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