ios - Apple Mach-O 链接器错误，退出代码为 1，解析注册页面

Question

我正在尝试自定义我的登录表单，它在默认设置下工作，现在我已经插入了所有代码来自定义它，我在编译时遇到了这个错误。 代码没有显示任何问题，这只是编译

这是错误输出

duplicate symbol _OBJC_IVAR_$_MySignUpViewController.fieldsBackground in:
    /Users/mikeaspinall/Library/Developer/Xcode/DerivedData/WeddingsAndMore-elgfqvgeaqmaksfrljnctjvknexm/Build/Intermediates/WeddingsAndMore.build/Debug-iphonesimulator/WeddingsAndMore.build/Objects-normal/x86_64/DMKWeddingHomeViewControler.o
    /Users/mikeaspinall/Library/Developer/Xcode/DerivedData/WeddingsAndMore-elgfqvgeaqmaksfrljnctjvknexm/Build/Intermediates/WeddingsAndMore.build/Debug-iphonesimulator/WeddingsAndMore.build/Objects-normal/x86_64/MySignUpViewController.o
duplicate symbol _OBJC_CLASS_$_MySignUpViewController in:
    /Users/mikeaspinall/Library/Developer/Xcode/DerivedData/WeddingsAndMore-elgfqvgeaqmaksfrljnctjvknexm/Build/Intermediates/WeddingsAndMore.build/Debug-iphonesimulator/WeddingsAndMore.build/Objects-normal/x86_64/DMKWeddingHomeViewControler.o
    /Users/mikeaspinall/Library/Developer/Xcode/DerivedData/WeddingsAndMore-elgfqvgeaqmaksfrljnctjvknexm/Build/Intermediates/WeddingsAndMore.build/Debug-iphonesimulator/WeddingsAndMore.build/Objects-normal/x86_64/MySignUpViewController.o
duplicate symbol _OBJC_METACLASS_$_MySignUpViewController in:
    /Users/mikeaspinall/Library/Developer/Xcode/DerivedData/WeddingsAndMore-elgfqvgeaqmaksfrljnctjvknexm/Build/Intermediates/WeddingsAndMore.build/Debug-iphonesimulator/WeddingsAndMore.build/Objects-normal/x86_64/DMKWeddingHomeViewControler.o
    /Users/mikeaspinall/Library/Developer/Xcode/DerivedData/WeddingsAndMore-elgfqvgeaqmaksfrljnctjvknexm/Build/Intermediates/WeddingsAndMore.build/Debug-iphonesimulator/WeddingsAndMore.build/Objects-normal/x86_64/MySignUpViewController.o
ld: 3 duplicate symbols for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我的 .m 文件

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];

    // Check if user is logged in
    if (![PFUser currentUser]) {
        // Instantiate our custom log in view controller
        DMKLoginViewController *logInViewController = [[DMKLoginViewController alloc] init];
        [logInViewController setDelegate:self];
        [logInViewController setFacebookPermissions:[NSArray arrayWithObjects:@"friends_about_me", nil]];
        [logInViewController setFields:PFLogInFieldsUsernameAndPassword
         | PFLogInFieldsTwitter
         | PFLogInFieldsFacebook
         | PFLogInFieldsSignUpButton
         | PFLogInFieldsDismissButton];

        // Instantiate our custom sign up view controller
        MySignUpViewController *signUpViewController = [[MySignUpViewController alloc] init];
        [signUpViewController setDelegate:self];
        [signUpViewController setFields:PFSignUpFieldsDefault | PFSignUpFieldsAdditional];



        // Link the sign up view controller
        [logInViewController setSignUpController:signUpViewController];



        // Present log in view controller
        [self presentViewController:logInViewController animated:YES completion:NULL];
    }

如有需要，可根据要求提供更多信息

Answer 1

如果您两次导入同一个文件，可能会发生这种情况，请检查您的编译源或项目导航器，看看您是否可以两次看到 MySignUpViewController，如果是，则删除其中一个引用