Question

当我在我的iphone应用程序关闭时查看控制台时，似乎我的encodewithcoder被调用了两次。即使我只编码一次'NewsItems'数组。

这是正常的吗？

(void)encodeWithCoder:(NSCoder *)encoder {
    NSLog(@"News encode called %@", self.title);    

    [encoder encodeObject:self.newsItemId forKey:KNewsItemNewsIdKey];   
    [encoder encodeObject:self.title forKey:KNewsItemTitleKey];
    [encoder encodeObject:self.author forKey:KNewsItemAuthorKey];
    [encoder encodeObject:self.description forKey:KNewsItemDescriptionKey];
    [encoder encodeObject:self.imageUrl forKey:KNewsItemImageUrlKey];
    [encoder encodeObject:self.thumbnailUrl forKey:KNewsItemThumbnailUrlKey];
    [encoder encodeObject:self.createdAt forKey:KNewsItemCreatedAtKey];

    //Images
    //convert from PNG to NSData, other method available for JPG
    NSData *savedImageData = UIImagePNGRepresentation(self.savedImage); 
    [encoder encodeObject:savedImageData forKey:KNewsItemSavedImageKey];

    NSData *thumbnailImageData = UIImagePNGRepresentation(self.savedThumbnail); 
    [encoder encodeObject:thumbnailImageData forKey:KNewsItemSavedThumbnailKey];

}


//code to encode
    [archiver encodeObject:self.newsArray forKey:KNewsArrayDataKey];

Answer 1

在NSLog()语句上放置一个断点并检查堆栈跟踪，看看每次都在给你打电话。

NSKeyedArchiver被召唤两次

1 个答案: