2

我在理解链接器命令错误时遇到问题。我收到以下内容：

duplicate symbol _OBJC_IVAR_$_XYZAddToDoItemViewController._toDoItem in:
/Users/*/Library/Developer/Xcode/DerivedData/ToDoToday-fjyijxlbvauebmeuhtgdvdrjtfez/Build/Intermediates/ToDoToday.build/Debug-iphonesimulator/ToDoToday.build/Objects-normal/i386/XYZToDoListViewController.o
/Users/*/Library/Developer/Xcode/DerivedData/ToDoToday-fjyijxlbvauebmeuhtgdvdrjtfez/Build/Intermediates/ToDoToday.build/Debug-iphonesimulator/ToDoToday.build/Objects-normal/i386/XYZAddToDoItemViewController.o
duplicate symbol _OBJC_CLASS_$_XYZAddToDoItemViewController in:
/Users/*/Library/Developer/Xcode/DerivedData/ToDoToday-fjyijxlbvauebmeuhtgdvdrjtfez/Build/Intermediates/ToDoToday.build/Debug-iphonesimulator/ToDoToday.build/Objects-normal/i386/XYZToDoListViewController.o
/Users/*/Library/Developer/Xcode/DerivedData/ToDoToday-fjyijxlbvauebmeuhtgdvdrjtfez/Build/Intermediates/ToDoToday.build/Debug-iphonesimulator/ToDoToday.build/Objects-normal/i386/XYZAddToDoItemViewController.o
duplicate symbol _OBJC_METACLASS_$_XYZAddToDoItemViewController in:
/Users/*/Library/Developer/Xcode/DerivedData/ToDoToday-fjyijxlbvauebmeuhtgdvdrjtfez/Build/Intermediates/ToDoToday.build/Debug-iphonesimulator/ToDoToday.build/Objects-normal/i386/XYZToDoListViewController.o
/Users/*/Library/Developer/Xcode/DerivedData/ToDoToday-fjyijxlbvauebmeuhtgdvdrjtfez/Build/Intermediates/ToDoToday.build/Debug-iphonesimulator/ToDoToday.build/Objects-normal/i386/XYZAddToDoItemViewController.o
ld: 3 duplicate symbols for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我不确定 Xcode 到底指的是哪些符号。下面是实现文件的顶部。

XYZToDoListViewController.m:

#import "XYZAddToDoItemViewController.h"
@interface XYZAddToDoItemViewController ()
@property NSMutableArray *toDoItems;
@end
@implementation XYZAddToDoItemViewController

XYZAddToDoItemViewController.m:

#import "XYZAddToDoItemViewController.h"
@interface XYZAddToDoItemViewController ()
@property (weak, nonatomic) IBOutlet UITextField *textField;
@property (weak, nonatomic) IBOutlet UIBarButtonItem *doneButton;
@end
@implementation XYZAddToDoItemViewController

任何帮助将不胜感激，谢谢。

4

2 回答 2

2

在您的XYZToDoListViewController.m更改中：

@interface XYZAddToDoItemViewController ()

至：

@interface XYZToDoListViewController ()

和：

@implementation XYZAddToDoItemViewController

至：

@implementation XYZToDoListViewController

和：

#import "XYZAddToDoItemViewController.h"

至：

#import "XYZToDoListViewController.h"

基本上你在XYZToDoListViewController.m文件中有错误的类名。

让你在文件中没有同样的错误XYZToDoListViewController.h。

于 2013-11-12T23:06:10.480 回答
0

我在 Bm 中导入 Am 时遇到此错误

确保只导入 .h 文件

于 2014-09-25T17:13:08.860 回答