#include <stdio.h>
#import <Foundation/Foundation.h>
//未运行成功
//方法的声明
@interface Car : NSObject //是这个类具有创建对象的功能
{
// 实例变量／成员变量的声明
@public
int wheels ;
int speeds ;
}
- (void)run;
@end
@implementation Car
-(void)run
{
NSlog(@"这个车的轮子是%d个,车的速度是%dkm/h",wheels,speeds);
}
@end
int main()
{
Car *p = [Car new];
p->wheels = 4 ;
p->speeds = 20 ;
[p run];
return 0;
}
复制代码
以下事终端提示的20十个错误，初学者很头疼
In file included from 方法与成员变量.c:2:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:8:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:397:1: error:
expected identifier or '('
@class NSString, Protocol;
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:399:19: error:
unknown type name 'NSString'
FOUNDATION_EXPORT NSString *NSStringFromSelector(SEL aSelector);
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:400:44: error:
unknown type name 'NSString'
FOUNDATION_EXPORT SEL NSSelectorFromString(NSString *aSelectorName);
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:402:19: error:
unknown type name 'NSString'
FOUNDATION_EXPORT NSString *NSStringFromClass(Class aClass);
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:403:43: error:
unknown type name 'NSString'
FOUNDATION_EXPORT Class NSClassFromString(NSString *aClassName);
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:405:19: error:
unknown type name 'NSString'
FOUNDATION_EXPORT NSString *NSStringFromProtocol(Protocol *proto) NS_AVAI...
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:405:50: error:
unknown type name 'Protocol'
FOUNDATION_EXPORT NSString *NSStringFromProtocol(Protocol *proto) NS_AVAI...
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:406:19: error:
unknown type name 'Protocol'
FOUNDATION_EXPORT Protocol *NSProtocolFromString(NSString *namestr) NS_AV...
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:406:50: error:
unknown type name 'NSString'
FOUNDATION_EXPORT Protocol *NSProtocolFromString(NSString *namestr) NS_AV...
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:410:30: error:
unknown type name 'NSString'
FOUNDATION_EXPORT void NSLog(NSString *format, ...) NS_FORMAT_FUNCTION(1,2);
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:410:53: error:
format argument not an NSString
FOUNDATION_EXPORT void NSLog(NSString *format, ...) NS_FORMAT_FUNCTION(1,2);
^ ~
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.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_...
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:411:31: error:
unknown type name 'NSString'
FOUNDATION_EXPORT void NSLogv(NSString *format, va_list args) NS_FORMAT_F...
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:411:63: error:
format argument not an NSString
...void NSLogv(NSString *format, va_list args) NS_FORMAT_FUNCTION(1,0);
^ ~
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.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_...
^
In file included from 方法与成员变量.c:2:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSArray.h:5:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:8:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSZone.h:8:1: error:
expected identifier or '('
@class NSString;
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSZone.h:16:52: error:
unknown type name 'NSString'
FOUNDATION_EXPORT void NSSetZoneName(NSZone *zone, NSString *name);
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSZone.h:17:19: error:
unknown type name 'NSString'
FOUNDATION_EXPORT NSString *NSZoneName(NSZone *zone);
^
In file included from 方法与成员变量.c:2:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:10:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSArray.h:5:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:10:1: error:
expected identifier or '('
@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:11:1: error:
expected identifier or '('
@class Protocol;
^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:15:1: error:
expected identifier or '('
@protocol NSCopying
^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
MacdeiMac:1119晚上 Mac$ |
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