Question

我正在努力将代码添加到使用card.io项目的现有iphone应用程序（由其他人编写）。这是我尝试过的第一个改变。该应用程序编译并运行正常，没有任何更改，但当我尝试将空的.cpp和.h文件添加到我的xcode项目时，我开始在一个名为CardIOMacros.h的无关的obj-c头文件中获取语法错误。我正在使用xcode 7.2并编译为iphone 4s设备。

我完成添加.cpp和.h文件的过程是

右键单击项目导航器中的项目节点
点击新文件
点击c ++图标
文件的类型名称并检查创建标题文件选项
选择项目目录中的子目录。
按主菜单中的构建和运行按钮

以下是我收到错误的文件。错误显示在代码下方。

//
//  CardIOMacros.h
//  See the file "LICENSE.md" for the full license governing this code.
//

// CardIOLog is a replacement for NSLog that logs iff CARDIO_DEBUG is set.

#if CARDIO_DEBUG
#define CardIOLog(format, args...) NSLog(format, ## args)
#else
#define CardIOLog(format, args...)
#endif

@interface CardIOMacros : NSObject

+ (id)localSettingForKey:(NSString *)key defaultValue:(NSString *)defaultValue productionValue:(NSString *)productionValue;

+ (NSUInteger)deviceSystemMajorVersion; 

+ (BOOL)appHasViewControllerBasedStatusBar; 

@end

#define iOS_MAJOR_VERSION  [CardIOMacros deviceSystemMajorVersion]
#define iOS_8_PLUS         (iOS_MAJOR_VERSION >= 8)
#define iOS_7_PLUS         (iOS_MAJOR_VERSION >= 7)
#define iOS_6              (iOS_MAJOR_VERSION == 6)
#define iOS_5              (iOS_MAJOR_VERSION == 5)

Compliler错误

/Users/michael/sdev/projectname/ios/card.io-iOS-20151210/Classes/CardIOMacros.h
/Users/michael/sdev/projectname/ios/card.io-iOS-20151210/Classes/CardIOMacros.h:14:1: Expected unqualified-id
/Users/michael/sdev/projectname/ios/card.io-iOS-20151210/Classes/CardIOMacros.h:18:1: Expected external declaration
/Users/michael/sdev/projectname/ios/card.io-iOS-20151210/Classes/CardIOMacros.h:18:4: C++ requires a type specifier for all declarations
/Users/michael/sdev/projectname/ios/card.io-iOS-20151210/Classes/CardIOMacros.h:18:15: Expected ';' after top level declarator
/Users/michael/sdev/projectname/ios/card.io-iOS-20151210/Classes/CardIOMacros.h:20:1: Expected external declaration
/Users/michael/sdev/projectname/ios/card.io-iOS-20151210/Classes/CardIOMacros.h:20:4: C++ requires a type specifier for all declarations
/Users/michael/sdev/projectname/ios/card.io-iOS-20151210/Classes/CardIOMacros.h:20:9: Expected ';' after top level declarator
/Users/michael/sdev/projectname/ios/card.io-iOS-20151210/Classes/CardIOMacros.h:22:1: Expected unqualified-id

.h和.cpp文件为空，我甚至不在任何其他文件中#include新的c ++头文件。任何帮助将不胜感激。

Answer 1

确保...-Prefix.pch中没有包含所述标题。

将空c ++文件添加到xcode项目会在obj-c头文件中创建语法错误

1 个答案: