我怎樣才能提高我試圖建立保護性

Question

#import "BGReviewController.h" 

@interface BGReviewController (protected) 
@property (weak, nonatomic) IBOutlet UIImageView *backgroundImage; 
@property (weak, nonatomic) IBOutlet UIButton *dislikeButton; 
@property (weak, nonatomic) IBOutlet UIButton *likeButton; 
@property (weak, nonatomic) IBOutlet UIButton *post; 
@property (weak, nonatomic) IBOutlet UIButton *cancel; 
@property (weak, nonatomic) IBOutlet UITextView *textView; 
@end 

然後我補充一下：

@synthesize backgroundImage = _backgroundImage; 
@synthesize dislikeButton = _dislikeButton; 
@synthesize likeButton = _likeButton; 
@synthesize post = _post; 
@synthesize cancel = _cancel; 
@synthesize textView = _textView; 

而且我得到了錯誤： /business/Dropbox/badgers/BadgerNew/BGReviewController.m:32:13：在類別'protected'中聲明的屬性不能在類實現中實現

我應該在該類別的實現文件中聲明合成，然後明確放置ivars嗎？

Answer 1

你不能@synthesize一個類別，你必須做的getter和setter方法手動

check out this answer

Answer 2

更換

@interface BGReviewController (protected)

隨着

@interface BGReviewController()