Ld /Users/Rubert/Library/Developer/Xcode/DerivedData/OC_Language-emftyzftyvhdpuaxipddjmpnpvox/Build/Products/Debug/OC_Language normal x86_64
cd /Users/Rubert/IOS/iworkspace/OC_Language
export MACOSX_DEPLOYMENT_TARGET=10.10
/Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch x86_64 -isysroot /Applications/Xcode-beta.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk -L/Users/Rubert/Library/Developer/Xcode/DerivedData/OC_Language-emftyzftyvhdpuaxipddjmpnpvox/Build/Products/Debug -F/Users/Rubert/Library/Developer/Xcode/DerivedData/OC_Language-emftyzftyvhdpuaxipddjmpnpvox/Build/Products/Debug -filelist /Users/Rubert/Library/Developer/Xcode/DerivedData/OC_Language-emftyzftyvhdpuaxipddjmpnpvox/Build/Intermediates/OC_Language.build/Debug/OC_Language.build/Objects-normal/x86_64/OC_Language.LinkFileList -mmacosx-version-min=10.10 -fobjc-arc -fobjc-link-runtime -Xlinker -dependency_info -Xlinker /Users/Rubert/Library/Developer/Xcode/DerivedData/OC_Language-emftyzftyvhdpuaxipddjmpnpvox/Build/Intermediates/OC_Language.build/Debug/OC_Language.build/Objects-normal/x86_64/OC_Language_dependency_info.dat -o /Users/Rubert/Library/Developer/Xcode/DerivedData/OC_Language-emftyzftyvhdpuaxipddjmpnpvox/Build/Products/Debug/OC_Language
duplicate symbol _OBJC_CLASS_$_Student in:
/Users/Rubert/Library/Developer/Xcode/DerivedData/OC_Language-emftyzftyvhdpuaxipddjmpnpvox/Build/Intermediates/OC_Language.build/Debug/OC_Language.build/Objects-normal/x86_64/main.o
/Users/Rubert/Library/Developer/Xcode/DerivedData/OC_Language-emftyzftyvhdpuaxipddjmpnpvox/Build/Intermediates/OC_Language.build/Debug/OC_Language.build/Objects-normal/x86_64/Student.o
duplicate symbol _OBJC_METACLASS_$_Student in:
/Users/Rubert/Library/Developer/Xcode/DerivedData/OC_Language-emftyzftyvhdpuaxipddjmpnpvox/Build/Intermediates/OC_Language.build/Debug/OC_Language.build/Objects-normal/x86_64/main.o
/Users/Rubert/Library/Developer/Xcode/DerivedData/OC_Language-emftyzftyvhdpuaxipddjmpnpvox/Build/Intermediates/OC_Language.build/Debug/OC_Language.build/Objects-normal/x86_64/Student.o
duplicate symbol _OBJC_IVAR_$_Student.s in:
/Users/Rubert/Library/Developer/Xcode/DerivedData/OC_Language-emftyzftyvhdpuaxipddjmpnpvox/Build/Intermediates/OC_Language.build/Debug/OC_Language.build/Objects-normal/x86_64/main.o
/Users/Rubert/Library/Developer/Xcode/DerivedData/OC_Language-emftyzftyvhdpuaxipddjmpnpvox/Build/Intermediates/OC_Language.build/Debug/OC_Language.build/Objects-normal/x86_64/Student.o
duplicate symbol _OBJC_IVAR_$_Student.age in:
/Users/Rubert/Library/Developer/Xcode/DerivedData/OC_Language-emftyzftyvhdpuaxipddjmpnpvox/Build/Intermediates/OC_Language.build/Debug/OC_Language.build/Objects-normal/x86_64/main.o
/Users/Rubert/Library/Developer/Xcode/DerivedData/OC_Language-emftyzftyvhdpuaxipddjmpnpvox/Build/Intermediates/OC_Language.build/Debug/OC_Language.build/Objects-normal/x86_64/Student.o
ld: 4 duplicate symbols for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
该问题主要是因为引用的头文件不对。
1 #import <Foundation/Foundation.h> 2 #import "Student.m" 3 4 int main(int argc, const char * argv[]) { 5 @autoreleasepool { 6 // 7 // 8 ////1.基本类型() 9 //NSLog(@"Hello, World!"); 10 //DataTypes_Clazz *stu = [[DataTypes_Clazz alloc] init]; 11 //[stu release]; 12 //2.基本语法 13 14 //创建方式1 15 Student *sPo = [Student alloc]; 16 sPo = [sPo init]; 17 [sPo setAge:(34)]; 18 NSLog(@"sPo.Age:%d",[sPo getAge]); 19 20 //创建方式2 21 Student *sPo2 = [[Student alloc] init]; 22 [sPo2 setAge:(12)];//设置值 23 NSLog(@"sPo2.Age:%d",[sPo2 getAge]); 24 25 //创建方式3 26 //NSString *ns = [[NSString alloc] init]; 27 NSString *ns2 = @"2323232"; 28 29 Student *sPo3 = [[Student alloc] initWithAge:(34) s:(ns2)]; 30 [sPo3 setAge:(24)];//设置值 31 NSLog(@"sPo3.Age:%d",[sPo3 getAge]); 32 NSLog(@"sPo3.S:%p",[sPo3 getS]); 33 34 } 35 36 return 0; 37 }
应该是#import "Student.h"，一不小心就犯了这个种低级错误。