[英]Building a wrapper framework for C++ project in Xcode
因此,我有一个C ++项目,我想放入一个框架中,该框架将充当C ++代码的包装器(用Objective-C / C ++编写),以便以后可以在Swift或Objective-C项目中使用它只需将框架添加到应用中即可。
到目前为止,我已经完成了什么:
#include "LocalHeader.h"
比目前写成#include "CppRootFolder/Subfolder/Header.h"
。 我也不想这样做,因为我想保持C ++文件不变。 问题:
一切似乎都运行良好,除了在构建实际的应用程序时,xcode会错误地指出无法在文件结构中找到文件。 为了说明我的意思,我有以下几点:
#include "CppRootFolder/umbrella.h"
(C ++伞形文件) #include "CppRootFolder/Subfolder/Header.h"
我对此:
在我看来,问题很明显,就是编译器需要从c ++代码的根文件夹中找到标头。 因此,在实际的应用程序中,在构建设置中,我将标头搜索路径添加到:$ BUILT_PRODUCTS_DIR / FrameworkName.framework / Headers,这是我用脚本复制所有标头的位置。 但是,构建失败并产生许多随机错误,无法识别已经定义的类型。
关于如何使它起作用的任何想法?
谢谢
更新(日志):
<module-includes>:1:9: note: in file included from <module-includes>:1:
#import "Headers/Box2D.h"
^
/Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/Box2D.h:17:9: note: in file included from /Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/Box2D.h:17:
#import "World.h"
^
/Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/World.h:10:9: note: in file included from /Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/World.h:10:
#import "Box2D/Box2D.h"
^
/Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/Box2D/Box2D.h:34:10: note: in file included from /Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/Box2D/Box2D.h:34:
#include "Box2D/Common/b2Settings.h"
^
/Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/Box2D/Common/b2Settings.h:153:8: error: must use 'struct' tag to refer to type 'b2Version'
extern b2Version b2_version;
^
<module-includes>:1:9: note: in file included from <module-includes>:1:
#import "Headers/Box2D.h"
^
/Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/Box2D.h:17:9: note: in file included from /Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/Box2D.h:17:
#import "World.h"
^
/Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/World.h:10:9: note: in file included from /Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/World.h:10:
#import "Box2D/Box2D.h"
^
/Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/Box2D/Box2D.h:35:10: note: in file included from /Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/Box2D/Box2D.h:35:
#include "Box2D/Common/b2Draw.h"
^
/Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/Box2D/Common/b2Draw.h:22:10: note: in file included from /Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/Box2D/Common/b2Draw.h:22:
#include "Box2D/Common/b2Math.h"
^
/Users/luis/Library/Developer/Xcode/DerivedData/Project-dgathvjusrdgslfvqqcvkeqyjzcb/Build/Products/Debug-iphoneos/Box2D.framework/Headers/Box2D/Common/b2Math.h:28:31: error: unexpected type name 'int32': expected expression
int32 ix = *reinterpret_cast<int32*>(&x);
编写包装器时,C ++在外部不可见。 所以#include "cppHedarFile.h"
应该不能在包装器外部访问,否则您将在目标C代码中使用C ++时出错。
因此,不应为C ++头文件提供伞头文件。
请提供技术细节:复制粘贴错误消息。 您对错误的解释可能会产生误导。
/Box2D.framework/Headers/Box2D/Common/b2Math.h:28:31: error: unexpected type name 'int32': expected expression int32 ix = *reinterpret_cast<int32*>(&x);
给我一个后悔,我是对的。 您很可能包括了Objective C文件*.m
C ++头文件。 对于此类文件,C ++标准标头不可访问,这就是为什么无法识别int32
原因。
就像我在乞讨时写的那样。 在围绕C ++编写Objective C包装程序时,禁止包含公共标头中的C ++标头。 你可以这样做只能形成*.mm
从中仅用于内部头文件*.mm
。 包装器通过这种方式完成工作,并从包装器用户处处理C ++。
公开标头KXSomeClass.h
:
#import "KXSomeClass+Internal.h"
@interface KXSomeClass ()
@property (assign, nonatomic) std::shared_ptr<SomeClass> native;
@end
#import "KXSomeClass+Internal.h"
#include "cpp/SomeClass.h"
@implementation CSCapability
- (instancetype)initWithNativeSomeClass:(const std::shared_ptr<SomeClass>&)nativeObject
{
if (self = [super init]) {
_native = nativeObject;
}
return self;
}
- (NSUInteger)someAction:(NSString *)s
{
return _native->SomeAction(s.UTF8String);
}
- (BOOL)allowed
{
return _native->Allowed();
}
@end
专用标头KXSomeClass+Internal.h
// this header is used only by wrappers #import "KXSomeClass.h" #include <memory> @interface KXSomeClass () - (instancetype)initWithNativeSomeClass:(const std::shared_ptr<SomeClass>&)nativeObject; @end
实施KXSomeClass.mm
#import "KXSomeClass+Internal.h" @interface KXSomeClass () @property (assign, nonatomic) std::shared_ptr<SomeClass> native; @end #import "KXSomeClass+Internal.h" #include "cpp/SomeClass.h" @implementation CSCapability - (instancetype)initWithNativeSomeClass:(const std::shared_ptr<SomeClass>&)nativeObject { if (self = [super init]) { _native = nativeObject; } return self; } - (NSUInteger)someAction:(NSString *)s { return _native->SomeAction(s.UTF8String); } - (BOOL)allowed { return _native->Allowed(); } @end
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