导入PCH文件之后报错,找不到NSString,UIKit,Foundation等,报错:
error: expected identifier or '('
@class NSString, Protocol;
^
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:494:9: error: unknown type name 'NSString'
typedef NSString * NSExceptionName NS_EXTENSIBLE_STRING_ENUM;
^
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:495:9: error: unknown type name 'NSString'
typedef NSString * NSRunLoopMode NS_EXTENSIBLE_STRING_ENUM;
^
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:497:19: error: unknown type name 'NSString'
FOUNDATION_EXPORT NSString *NSStringFromSelector(SEL aSelector);
^
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:498:44: error: unknown type name 'NSString'
FOUNDATION_EXPORT SEL NSSelectorFromString(NSString *aSelectorName);
^
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:500:19: error: unknown type name 'NSString'
FOUNDATION_EXPORT NSString *NSStringFromClass(Class aClass);
^
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:501:53: error: unknown type name 'NSString'
FOUNDATION_EXPORT Class _Nullable NSClassFromString(NSString *aClassName);
^
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:503:19: error: unknown type name 'NSString'
FOUNDATION_EXPORT NSString *NSStringFromProtocol(Protocol *proto) NS_AVAILABLE(10_5, 2_0);
^
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:503:50: error: declaration of 'Protocol' must be imported from module 'ObjectiveC.runtime' before it is required
FOUNDATION_EXPORT NSString *NSStringFromProtocol(Protocol *proto) NS_AVAILABLE(10_5, 2_0);
^
In module 'ObjectiveC' imported from /Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:9:
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/usr/include/objc/runtime.h:78:28: note: previous declaration is here
typedef struct objc_object Protocol;
^
While building module 'UIKit' imported from /Users/cbwl/Library/Developer/Xcode/DerivedData/BBJD-dimoovxwuxypokadrohgluegljkb/Build/Products/Debug-iphonesimulator/SDAutoLayout/SDAutoLayout.framework/Headers/UIView+SDAutoLayout.h:55:
While building module 'Foundation' imported from /Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIAccelerometer.h:8:
In file included from :1:
In file included from /Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:8:
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:504:61: error: unknown type name 'NSString'
FOUNDATION_EXPORT Protocol * _Nullable NSProtocolFromString(NSString *namestr) NS_AVAILABLE(10_5, 2_0);
^
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:508:30: error: unknown type name 'NSString'
FOUNDATION_EXPORT void NSLog(NSString *format, ...) NS_FORMAT_FUNCTION(1,2) NS_NO_TAIL_CALL;
^
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:508:53: error: format argument not an NSString
FOUNDATION_EXPORT void NSLog(NSString *format, ...) NS_FORMAT_FUNCTION(1,2) NS_NO_TAIL_CALL;
~~~~~~~~~~~~~~~~^~
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:98:49: note: expanded from macro 'NS_FORMAT_FUNCTION'
#define NS_FORMAT_FUNCTION(F,A) __attribute__((format(__NSString__, F, A)))
^~
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:509:31: error: unknown type name 'NSString'
FOUNDATION_EXPORT void NSLogv(NSString *format, va_list args) NS_FORMAT_FUNCTION(1,0) NS_NO_TAIL_CALL;
^
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:509:63: error: format argument not an NSString
FOUNDATION_EXPORT void NSLogv(NSString *format, va_list args) NS_FORMAT_FUNCTION(1,0) NS_NO_TAIL_CALL;
~~~~~~~~~~~~~~~~^~
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:98:49: note: expanded from macro 'NS_FORMAT_FUNCTION'
#define NS_FORMAT_FUNCTION(F,A) __attribute__((format(__NSString__, F, A)))
^~
While building module 'UIKit' imported from /Users/cbwl/Library/Developer/Xcode/DerivedData/BBJD-dimoovxwuxypokadrohgluegljkb/Build/Products/Debug-iphonesimulator/SDAutoLayout/SDAutoLayout.framework/Headers/UIView+SDAutoLayout.h:55:
While building module 'Foundation' imported from /Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/System/Library/Frameworks/UIKit.framework/Headers/UIAccelerometer.h:8:
/Applications/XCode8.1/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator10.1.sdk/usr/include/objc/module.map:8:10: error: module 'ObjectiveC.NSObject' requires feature 'objc'
解决:
在PCH中添加#ifdef ObjectC,即可解决
