Question

我遇到了A子类的问题。我已经通过所有正确的设置（在委托中注册子类，设置类名等）。但由于某种原因，我不能让对象加载而不会在它应该加载的视图中崩溃。

传递对象

PFObject

接收View.h

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

接收View.m

//  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;

pbPost.h

#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.m

@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;

在这种情况下;我在实施文件中的@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; }处获得EXC_BAD_ACCESS。

我觉得我在这里缺少一些非常简单的东西;它能是什么？再次感谢大家的帮助！这让我感到困惑了一段时间，我需要得到一些外界的帮助。

Answer 1

由于您传递的是pbPost对象，因此根本不需要调用+ (pbPost *)postWithObject:(PFObject *)object。要创建PFObject子类的新实例，只需调用：

pbPost *post = [pbPost object];

PFObject子类未加载Objective-C

1 个答案: