PFObject子類未加載Objective-C

Question

我在使用PFObject子類時遇到了一些麻煩。 我已經進行了所有適當的設置（在委托中注冊子類，設置類名稱等）。 但是由於某種原因，我無法加載該對象而不會在應該加載的視圖中將其崩潰。

傳遞物體

if ([segue.identifier isEqualToString:@"toPostView"])
{
    pbPostViewController *postView = [pbPostViewController new];
    postView = (pbPostViewController *)segue.destinationViewController;
    [postView setPostToLoad:_selectedPost];
}

接收View.h

//  Copyright (c) 2015 Chris Culos. All rights reserved.
//

#import <UIKit/UIKit.h>
#import <Parse/Parse.h>
#import "PALongTextView.h"
#import "pbPost.h"

@interface pbPostViewController : UIViewController

@property (strong, nonatomic) pbPost *postToLoad;

接收View.m

#import "pbPost.h"

@interface pbPostViewController ()

@end

@implementation pbPostViewController

- (void)viewDidLoad {

    pbPost *post = [pbPost postWithObject:_objectToLoad];
    NSLog(@"post: %@", post);


//    _timeStampLabel.text      = post.postTimeStamp;
    _userNameLabel.text       = [post.postOwner valueForKey:@"username"];
    _profileImage.image       = [post.postOwner valueForKey:@"profileImage"];
    _postDescriptionView.text = post.postDescriptionString;
    _bookmarkCounterLabel.text= [NSString stringWithFormat:@"%li bookmarks", post.postBookmarkedArray.count];
    _postContentView.text     = @"POST CONTENT PAGE 123 456 ETC ETC ETC";


    [super viewDidLoad];
    //

pbPost.h

@interface pbPost : PFObject <PFSubclassing>
{

}
@property (nonatomic, retain) NSDate *postTimeStamp;
@property (nonatomic, retain) NSString *postDescriptionString;
@property (nonatomic, retain) NSString *postContentString;
@property (nonatomic, retain) NSString *postBookmarkString;
@property (nonatomic, retain) NSString *postPageCounterString;
@property (nonatomic, retain) NSArray  *postBookmarkedArray;
@property (nonatomic, retain) PFFile   *postOwnerProfileImage;

@property (nonatomic, retain) NSNumber *postFontSize, *totalPages;

@property (nonatomic, retain) PFUser *postOwner;

+ (pbPost *) postWithObject: (PFObject *)object;

郵局

@implementation pbPost

@dynamic postContentString, postBookmarkString, postDescriptionString, postPageCounterString, postTimeStamp, commentTableView, commentButton, bookMarkButton, postOwnerProfileImage, optionsButton, postFontSize, totalPages, postBookmarkedArray, postOwner;

+ (void)load
{
    [self registerSubclass];
}

+ (NSString *)parseClassName
{
    return @"userPosts";
}

+ (pbPost *) postWithObject: (PFObject *)object
{
//    NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
//    [dateFormat setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"];
//    [dateFormat setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC"]];

    pbPost *post               = [pbPost postWithObject:object];

    [post fetchInBackgroundWithBlock:^(PFObject *object, NSError *error) {
        if (!error) {
            post.postTimeStamp         = [object valueForKey:@"createdAt"];
            post.postDescriptionString = [object valueForKey:@"titleSummary"];
            post.postFontSize          = [object valueForKey:@"fontSize"];
            post.postContentString     = [object valueForKey:@"postContent"];
            post.totalPages            = [object valueForKey:@"numPages"];
            post.postBookmarkedArray   = [object valueForKey:@"bookmarkedBy"];
            post.postOwner             = [object valueForKey:@"postOwner"];
            post.postOwnerProfileImage = [post.postOwner valueForKey:@"profileImage"];

            NSLog(@"LOAD THE THING!: %@", post);
        }
        else

        {
            NSLog(@"Error Loading Post: %@", error);
        }
    }];




    return post;
}

在這種情況下； 我得到一個EXC_BAD_ACCESS在+ (pbPost *)postWithObject:(PFObject *)object在實現文件。

我覺得這里缺少一些非常簡單的東西； 會是什么 在此先感謝大家的幫助！ 這讓我難過了一陣子，我需要一些外部幫助。

Answer 1

由於要傳遞pbPost對象，因此根本不需要調用+ (pbPost *)postWithObject:(PFObject *)object 。 要創建PFObject子類的新實例，只需調用：

pbPost *post = [pbPost object];