Question

我正在使用clang编译我的代码，但出现错误，代码和错误如下：

/Users/fenglihai/llvm/llvm_build/Debug/bin/ClangConfuse /Users/fenglihai/Desktop/Test/Test/ITXAppdelegate.m /Users/fenglihai/Desktop/Test/Test/main.m /Users/fenglihai/Desktop/Test/Test/MainViewController.m /Users/fenglihai/Desktop/Test/Test/VTEnumType.h /Users/fenglihai/Desktop/Test/Test/ITXAppdelegate.h /Users/fenglihai/Desktop/Test/Test/MainViewController.h -- -w -std=gnu11 -fobjc-abi-version=2 -Wnullability-completeness -Wno-arc-repeated-use-of-weak -Wno-conversion -Wconstant-conversion -Wint-conversion -Wbool-conversion -Wenum-conversion -Wno-float-conversion -Wnon-literal-null-conversion -Wobjc-literal-conversion -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.1.sdk -isystem /Users/fenglihai/llvm/llvm_build/Debug/lib/clang/9.0.0/include -Wnull-dereference -fobjc-weak -ObjC -mios-simulator-version-min=8.0 -ObjC -lSDWebImage -lSVProgressHUD -lYYCache -lYYCategories -lc++ -ljcore-ios-1.2.6 -ljpush-ios-3.1.2 -lpop -lresolv -lsqlite3 -lz -framework Accelerate -framework CFNetwork -framework CoreFoundation -framework CoreGraphics -framework CoreImage -framework CoreTelephony -framework CoreText -framework Foundation -framework ImageIO -framework QuartzCore -framework Security -framework SystemConfiguration -framework UIKit -weak_framework UserNotifications -I/Users/fenglihai/Desktop/Test/Test -I/Users/fenglihai/Desktop/Test/Test -I/Users/fenglihai/Desktop/Test/Test -I/Users/fenglihai/Desktop/Test/Pods/Headers/Public -I/Users/fenglihai/Desktop/Test/Pods/Headers/Public/JPush -I/Users/fenglihai/Desktop/Test/Pods/Headers/Public/SDWebImage -I/Users/fenglihai/Desktop/Test/Pods/Headers/Public/SVProgressHUD -I/Users/fenglihai/Desktop/Test/Pods/Headers/Public/YYCache -I/Users/fenglihai/Desktop/Test/Pods/Headers/Public/YYCategories -I/Users/fenglihai/Desktop/Test/Pods/Headers/Public/pop

我得到了错误：

/Users/fenglihai/Desktop/Test/Test/VTEnumType.h:13:44: error: function definition declared 'typedef'
typedef NS_ENUM(NSUInteger, VTLayoutStyle) {
                                           ^
/Users/fenglihai/Desktop/Test/Test/VTEnumType.h:15:5: error: use of undeclared identifier 'VTLayoutStyleDefault'
    VTLayoutStyleDefault,
    ^
/Users/fenglihai/Desktop/Test/Test/VTEnumType.h:17:5: error: use of undeclared identifier 'VTLayoutStyleDivide'; did you mean 'VTLayoutStyle'?
    VTLayoutStyleDivide,
    ^~~~~~~~~~~~~~~~~~~
    VTLayoutStyle
/Users/fenglihai/Desktop/Test/Test/VTEnumType.h:13:29: note: 'VTLayoutStyle' declared here
typedef NS_ENUM(NSUInteger, VTLayoutStyle) {
                            ^
/Users/fenglihai/Desktop/Test/Test/VTEnumType.h:19:5: error: use of undeclared identifier 'VTLayoutStyleCenter'; did you mean 'VTLayoutStyle'?
    VTLayoutStyleCenter,
    ^~~~~~~~~~~~~~~~~~~
    VTLayoutStyle
/Users/fenglihai/Desktop/Test/Test/VTEnumType.h:13:29: note: 'VTLayoutStyle' declared here
typedef NS_ENUM(NSUInteger, VTLayoutStyle) {
                            ^
4 errors generated.
Error while processing /Users/fenglihai/Desktop/Test/Test/VTEnumType.h.

VTEnumType.h

#ifndef VTEnumType_h
#define VTEnumType_h

/** 导航栏布局样式 */
typedef NS_ENUM(NSUInteger, VTLayoutStyle) {
    /** 默认样式，item自适应文本宽度，间距由itemSpacing决定 */
    VTLayoutStyleDefault,
    /** items等分导航条宽度，常用于item数较少时 */
    VTLayoutStyleDivide,
    /** 导航栏居中布局，间距由itemSpacing决定 */
    VTLayoutStyleCenter,
};



#endif /* VTEnumType_h */

ITXAppdelegate.m

#import "ITXAppdelegate.h"
#import "VTEnumType.h"

@interface ITXAppdelegate ()
@property (nonatomic, assign) VTLayoutStyle height;
@end

@implementation ITXAppdelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.height =VTLayoutStyleDefault ;
    return YES;
}

@end

Answer 1

如果您是通过直接命令行将项目建立到clang的，那么我认为正在发生的事情是您将clang的头文件（.h）指定为clang作为源文件，而不是。

这是如果NS_ENUM宏不可用时会出现的错误-编译器对您要在此处执行的操作感到困惑。该宏通常可以通过标准的Foundation和Cocoa include标头提供，但是如果编译器试图将您的标头文件本身视为源文件，则该标头不包含Foundation，因此枚举内容是“ t在那时定义。

更重要的是，您应该只要求clang编译源单元（.m）。编译器将继续查看标头的引用，并根据需要通过预处理器将其加载。如果执行此操作时无法找到所需的标头，则会让您知道。

lang错误：函数定义声明为'typedef'

1 个答案: