从C ++调用Objective-C类方法 [英] Calling an Objective-C class method from C++
问题描述
从C ++文件调用Objective-C类方法时遇到麻烦.示例:
I am having some trouble calling an objective-c class method from a C++ file. Example:
在我的.h中:
@interface MyClass : NSObject {
}
+ (void)myMethod:(NSString *)str;
在我的.m中:
+ (void) myMethod:(NSString *)str { ... }
在我的.cpp中:
??
由于没有类实例，如何调用myMethod?它本质上是静态的吗?
How can you call myMethod since there is no class instance? Its essentially a static?
谢谢
推荐答案
C ++中的对象与Objective-C中的对象不兼容.您不能简单地从C ++调用Objective-C方法.
Objects in C++ are incompatible with objects in Objective-C. You cannot simply call an Objective-C method from C++.
但是，有一些解决方案:
There are some solutions, however:
-
使用Objective-C ++.将
.cpp重命名为.mm，然后可以在C ++代码中使用Objective-C语法:[FlurryAnalytics myMethod: @"foo"];
Use Objective-C++. Rename your
.cppto.mm, then you can use Objective-C syntax in your C++ code:[FlurryAnalytics myMethod: @"foo"];
使用对Objective-C运行时系统的直接调用.我不会告诉你怎么做，因为我真的认为你不应该，事实上你也不想.
Use direct calls to the Objective-C runtime system. I won't tell you how to, because I really think you shouldn't, and in fact that you don't want to.
编写纯C接口.也就是说，在某些.m文件中，定义void myFunction(const char *str) { ... }并从C ++调用它.您可以在此处找到示例.
Write a plain-C interface. That is, in some .m file, define void myFunction(const char *str) { ... } and call that from C++. You can find an example of this here.
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