在接口声明中设置编译条件时，接口生成器无法识别IBOutlet

Question

如果我在头文件中添加这个条件编译标志，则xib文件不能读取IBOutlet并显示为缺失。并给出警告。

在运行时它工作得很好。有没有人遇到过同样的问题？

/* MFMessageComposeViewControllerDelegate is available in iOS 4.0 and later. */



#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 40000

   @interface SendMoneyResponseVC : UITableViewController 
    <UINavigationControllerDelegate, MFMessageComposeViewControllerDelegate,    
    MFMailComposeViewControllerDelegate, UIActionSheetDelegate> 

   #else

   @interface SendMoneyResponseVC : UITableViewController 
    <UINavigationControllerDelegate, 
    MFMailComposeViewControllerDelegate, UIActionSheetDelegate> 

    #endif 

{
    IBOutlet UITableView *sendMoneyTableVC;

    IBOutlet UITableViewCell *refNumRemittanceCell;
    IBOutlet UILabel *refNumLabel, *refNumValueLabel, *refNumInfoLabel;

    IBOutlet UITableViewCell *refNumDomesticCell;
    IBOutlet UILabel *domesticInfoLabel, *feeAndReferenceLabel;

    IBOutlet UITableViewCell *shareRefNumCell;
    IBOutlet UIButton *shareRefNumButton;

    NSString *referenceNumber, *recipient, *currency, *mtoName;
    float amount, fee;
    int sendMoneyType;

    UIAlertView *smsAlertView;
}

@property (nonatomic, retain) UITableView *sendMoneyTableVC;

@property (nonatomic, retain) UITableViewCell *refNumRemittanceCell;
@property (nonatomic, retain) UILabel *refNumLabel, *refNumValueLabel, *refNumInfoLabel;

@property (nonatomic, retain) UITableViewCell *refNumDomesticCell;
@property (nonatomic, retain) UILabel *domesticInfoLabel, *feeAndReferenceLabel;

@property (nonatomic, retain) UITableViewCell *shareRefNumCell;
@property (nonatomic, retain) UIButton *shareRefNumButton;

@property (nonatomic, retain) NSString *referenceNumber, *recipient, *currency, *mtoName;
@property float amount, fee;
@property int sendMoneyType;

- (IBAction) didPressShareButton;

@end

Answer 1

这样做的原因是什么？除非你想用过时的SDK编译，否则你应该去掉它。

Interface Builder不会对您的文件进行预处理，因此它将看到两个@Interface和一个@end。

而接口生成器不能解析这样的东西。

Answer 2

你有没有尝试过以一种相当于编译器的方式重构你的代码，但又不太可能混淆Interface Builder？如下所示：

@interface SendMoneyResponseVC : UITableViewController 
    <UINavigationControllerDelegate, 
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 40000
    MFMessageComposeViewControllerDelegate,    
#endif 
    MFMailComposeViewControllerDelegate, 
    UIActionSheetDelegate> 
{ ... }
@end

这样，将只有一个@interface/@end对。