ios - Parse.com で JSQMessagesViewController を使用する

Question

メッセージング システムを組み込みたいアプリにとって非常に便利な、非常に複雑でカスタマイズされたライブラリのように見えるものに出会いました。Github の JSQMessagesViewController。ライブラリを自分で実装しようとしているときに、いくつかの問題に遭遇しました。1つは、「プロトコル」と「クラス」の用語がよくわかりません（クラスについては少し理解しています）。最初の問題は、ほとんどのカスタム メソッドを介して JSQMessage のインスタンスを渡す必要があるため、CollectionView で PFObjects を使用できなかったことです。今、私は PFObject を取り込んで、そのようなプロパティを取得する方法を知っています

self.eachMessage = [self.messages objectAtIndex:indexPath.row]; //each message
self.eachMessage[@"message"] //message from the PFObject
self.eachMessage[@"sender"] //sender from the PFObject

JSQMessage クラスには、次のような PFObject のプロパティを表すカスタム プロパティがあります。

JSQMessage *message = [[JSQMessage alloc] init]; //initialize it
message.senderId //could be the objectId of the user
message.senderDisplayName //the user's username
message.text //text of the message
message.date //time sent of the message

問題は、カスタム クラス JSQMessage では、これらのプロパティはすべて読み取り専用です。それを変更して、必要なものに正確に割り当てることができると確信していますが、ここに欠けているものがあるに違いありません。.h および .m ファイルにすべてを添付します。私がメッセージを送信すると、テキストだけが送信されます。これは、inputToolbar の textView から送信されたときに取得されるためだと思います。

.h ファイル

#import <UIKit/UIKit.h>
#import <JSQMessagesViewController/JSQMessages.h>
#import <Parse/Parse.h>
#import <JSQMessagesViewController/JSQMessagesBubbleImageFactory.h>


@interface ConvoViewController : JSQMessagesViewController 

@property (strong, nonatomic) NSMutableArray *messages;
@property (strong, nonatomic) PFUser *sender;
@property (strong, nonatomic) PFUser *receiver;
@property (strong, nonatomic) JSQMessage *eachMessage;
@property (strong, nonatomic) PFObject *aMessage;
@property (strong, nonatomic) JSQMessagesBubbleImageFactory *bubbleImage;

@end

.m ファイル

- (void)viewDidLoad {
    [super viewDidLoad];
    //Color of the keyboard (Dark to match everything else)
    self.inputToolbar.contentView.textView.keyboardAppearance = UIKeyboardAppearanceDark;

    //Color the inputview background
    self.inputToolbar.backgroundColor = [UIColor colorWithWhite:0 alpha:0.9];

    //Delete the avatars appearing next to the messages
    self.collectionView.collectionViewLayout.incomingAvatarViewSize = CGSizeZero;
    self.collectionView.collectionViewLayout.outgoingAvatarViewSize = CGSizeZero;

    //Set the senderID
    self.senderId = self.sender.objectId;


}

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:YES];

    //Query for part of the messages
    PFQuery *messages1 = [PFQuery queryWithClassName:@"Messages"];
    [messages1 whereKey:@"sender" equalTo:self.sender];
    [messages1 whereKey:@"receiver" equalTo:self.receiver];

    //Query for other part of messages
    PFQuery *messages2 = [PFQuery queryWithClassName:@"Messages"];
    [messages2 whereKey:@"sender" equalTo:self.receiver];
    [messages2 whereKey:@"receiver" equalTo:self.sender];

    //Combine those queries
    PFQuery *allMessages = [PFQuery orQueryWithSubqueries:@[messages1, messages2]];
    [allMessages findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        self.messages = [objects mutableCopy];
        [self.collectionView reloadData];
    }];

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}


#pragma mark - Send Button
- (void)didPressSendButton:(UIButton *)button withMessageText:(NSString *)text senderId:(NSString *)senderId senderDisplayName:(NSString *)senderDisplayName date:(NSDate *)date {
    [JSQSystemSoundPlayer jsq_playMessageSentSound];

    JSQMessage *message = [[JSQMessage alloc] initWithSenderId:self.sender.objectId
                                             senderDisplayName:self.sender.username
                                                          date:[NSDate date]
                                                          text:text];

    [self.messages addObject:message];
    NSLog(@"%@", text);

    [self finishSendingMessageAnimated:YES];


}

#pragma mark - JSQMessages Data Source methods

- (id<JSQMessageData>)collectionView:(JSQMessagesCollectionView *)collectionView messageDataForItemAtIndexPath:(NSIndexPath *)indexPath
{
    //Return the actual message at each indexpath.row
    return [self.messages objectAtIndex:indexPath.row];
}

- (id<JSQMessageBubbleImageDataSource>)collectionView:(JSQMessagesCollectionView *)collectionView messageBubbleImageDataForItemAtIndexPath:(NSIndexPath *)indexPath
{
    /**
     *  You may return nil here if you do not want bubbles.
     *  In this case, you should set the background color of your collection view cell's textView.
     *
     *  Otherwise, return your previously created bubble image data objects.
     */

    JSQMessage *message = [self.messages objectAtIndex:indexPath.item];
    if ([message.senderId isEqualToString:self.senderId]) {
        return [self.bubbleImage incomingMessagesBubbleImageWithColor:[UIColor orangeColor]];
    }

    return [self.bubbleImage outgoingMessagesBubbleImageWithColor:[UIColor grayColor]];
}



#pragma mark - Collection View

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
    //Number of messages
    return self.messages.count;
}

- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
    //Number of sections
    return 1;
}


- (UICollectionViewCell *)collectionView:(JSQMessagesCollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    //Creating or initial cell for the number of index paths (number of messages)
    JSQMessagesCollectionViewCell *cell = (JSQMessagesCollectionViewCell *)[super collectionView:collectionView cellForItemAtIndexPath:indexPath];

    //Put our messages dictionaries into PFObject so we can put them into individual cells
    self.eachMessage = [self.messages objectAtIndex:indexPath.row];


    //Put the message object into the textView's text property
    cell.textView.text = self.eachMessage.text;

    //Setting the text color of the message bubble based upon the sender
    if ([self.eachMessage.senderId isEqualToString:self.senderId]) {
        cell.textView.textColor = [UIColor blackColor];
    } else {
        cell.textView.textColor = [UIColor whiteColor];
    }
    //Set the top label to the person who sent the message
    cell.cellTopLabel.text = [NSString stringWithFormat:@"@%@", self.eachMessage.senderId];

    //Format the bottom label to a readable date
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat:@"MM/dd/yy h:mm a"];
    cell.cellBottomLabel.text = [dateFormatter stringFromDate:self.eachMessage.date];

    //If there is a link of some sorts in the message
    cell.textView.linkTextAttributes = @{ NSForegroundColorAttributeName : cell.textView.textColor,
                                          NSUnderlineStyleAttributeName : @(NSUnderlineStyleSingle | NSUnderlinePatternSolid) };

    //What we return into the collectionview
    return cell;

}