如何改进创建受保护属性的尝试

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

然后我补充说：

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

我得到了错误： /business/Dropbox/badgers/BadgerNew/BGReviewController.m:32:13：在类实现中声明的属性'protected'无法在类实现中实现

我应该在类别的实现文件中声明合成，然后明确地放入ivars吗？

Answer 1

你不能在一个类别中使用@synthesize，你必须手动执行getter和setter

check out this answer

Answer 2

替换

@interface BGReviewController (protected)

使用

@interface BGReviewController ()