[iOS] 大神辛苦帮帮我，，OC中的类和对象的问题，我能不了了，.

SunJiaqi

#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$

复制代码

SunJiaqi · SunJiaqi

兄弟我把图片给你发过去你看看我运行你的代码跟你一样的错我发现你的 NSlog 写错了然后我改了 NSLog 然后运行就成功了。

天空总是很蓝 · 天空总是很蓝

问题根源有两种；英文不扎实，错误没有积累没见过它

weizhang00 · weizhang00

兄弟啊，你拿什么开发的？
报错这么多，你源文件是几个，全写.h了？
我一般都用xcode写
你这个错误我感觉是框架没正确引入吧
而且，oc不都是init和点语法么，为什么有new还有->
你把你怎么创建文件，怎么写的，怎么编译的告诉我

天空总是很蓝 · 天空总是很蓝

weizhang00 发表于 2014-11-21 00:56
兄弟啊，你拿什么开发的？
报错这么多，你源文件是几个，全写.h了？
我一般都用xcode写

IOS开发零基础教程-04Objective-C ▸ 02-面向对象 ▸ 02-类和对象老师那个视频路径是这个看完类和对象，然后我按照老师讲课的思路自己写了下代码运行之后出现很多错误，我去翻视频看。还是这样在终端里面新建的touch .c文件，然后在终端口令open打开它运行 cc方法与成员变量.c 也是xcode写的

itDave · itDave

我运行了一下，确实有问题。你的NSLog “L"大写。并且，同学，你链接的时候加上-framework Foundation 么？

天空总是很蓝 · 天空总是很蓝

itDave 发表于 2014-11-21 03:18
我运行了一下，确实有问题。你的NSLog “L"大写。并且，同学，你链接的时候加上-framework Foundation 么？ ...

改了也不管。试过了

天空总是很蓝 · 天空总是很蓝

itDave 发表于 2014-11-21 03:18
我运行了一下，确实有问题。你的NSLog “L"大写。并且，同学，你链接的时候加上-framework Foundation 么？ ...

改了也不管。试过了

天空总是很蓝 · 天空总是很蓝

itDave 发表于 2014-11-21 03:18
我运行了一下，确实有问题。你的NSLog “L"大写。并且，同学，你链接的时候加上-framework Foundation 么？ ...

改了也不管。试过了

itDave · itDave

我当时把#include注释了。同学，您确定你的xcode安装正确么！不可能有问题的呀？
如果xcode有问题，可以试一下,终端输入：sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer 我尽力了啊！真的想帮你

天空总是很蓝 · 天空总是很蓝

itDave 发表于 2014-11-21 11:04
我当时把#include注释了。同学，您确定你的xcode安装正确么！不可能有问题的呀？
如果xcode有问题，可以试 ...

在你电脑Xcode运行以上程序没问题吗？

weizhang00 · weizhang00

总感觉哪里不对.c
oc的文件是.h和.m

weizhang00 · weizhang00

你仔细看看视频到底建的什么.文件

itDave · itDave

天空总是很蓝发表于 2014-11-21 11:30
在你电脑Xcode运行以上程序没问题吗？

通过了，没有错误

天空总是很蓝 · 天空总是很蓝

weizhang00 发表于 2014-11-21 12:33
你仔细看看视频到底建的什么.文件

视频上说.m 文件时可以兼容的c 我建的是.c文件

天空总是很蓝 · 天空总是很蓝

weizhang00 发表于 2014-11-21 12:33
你仔细看看视频到底建的什么.文件

重新.m文件我试试

天空总是很蓝 · 天空总是很蓝

itDave 发表于 2014-11-21 11:04
我当时把#include注释了。同学，您确定你的xcode安装正确么！不可能有问题的呀？
如果xcode有问题，可以试 ...

天空总是很蓝 · 天空总是很蓝

itDave 发表于 2014-11-21 11:04
我当时把#include注释了。同学，您确定你的xcode安装正确么！不可能有问题的呀？
如果xcode有问题，可以试 ...

输入上面那个命令了提示输入密码不知道密码啊然后按ctrl＋c中止了

天空总是很蓝 · 天空总是很蓝

itDave 发表于 2014-11-21 11:04
我当时把#include注释了。同学，您确定你的xcode安装正确么！不可能有问题的呀？
如果xcode有问题，可以试 ...

输入上面那个命令了提示输入密码不知道密码啊然后按ctrl＋c中止了

itDave · itDave

就是你的登陆密码。你登陆电脑的密码

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[iOS] 大神辛苦帮帮我，，OC中的类和对象的问题，我能不了了，.

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