【发布时间】：2015-09-08 18:28:35
【问题描述】：
我正在使用 QuickBlox 框架来构建聊天应用程序。目前，当聊天视图打开时，一切看起来都很棒。
但是，当用户开始上下滚动聊天记录时，一些单元格开始发生变化（例如，它们会显示应该放置在不同行中的图像）。
下面是我的 cellForRowAtIndexPath 代码，如果有人能告诉我我做错了什么
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
QBChatMessage *message = [[ChatService shared] messagsForDialogId:self.dialog.ID][indexPath.row];
if (message.attachments.count > 0) {
ImageTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ImageCellIdentifier];
[cell configureCellWithImage:message];
cell.backgroundColor = [UIColor whiteColor];
return cell;
} else {
ChatMessageTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ChatMessageCellIdentifier];
[cell configureCellWithMessage:message];
cell.backgroundColor = [UIColor whiteColor];
return cell;
}
}
编辑请看下面我的 ImageTableViewCell configureCellWithImage 方法：
- (void) configureCellWithImage:(QBChatMessage*)message {
NSString *time = [message.dateSent timeAgoSinceNow];
if ([QBSession currentSession].currentUser.ID == message.senderID) {
// Message was sent by me
NSData *imageData = [FTWCache objectForKey:[NSString stringWithFormat:@"%@", [message.attachments[0] valueForKey:@"ID"]]];
if (imageData) {
// image is already downloaded
dispatch_async(dispatch_get_main_queue(), ^{
UIImage *image = [UIImage imageWithData:imageData];
UIImageView *cellImage = [[UIImageView alloc] init];
[self.backgroundImageView setFrame:CGRectMake(320-155, 10, 140, 140)];
cellImage.frame = CGRectMake(7, 7, 120, 120);
[cellImage setContentMode:UIViewContentModeScaleAspectFill];
cellImage.clipsToBounds = YES;
cellImage.layer.cornerRadius = 5;
cellImage.image = image;
self.backgroundImageView.image = aquaBubble;
[self.backgroundImageView addSubview:cellImage];
[self.contentView addSubview:self.backgroundImageView];
});
} else {
// downloads the image and displays as above
}
} else {
// Message was sent by another user
NSData *imageData = [FTWCache objectForKey:[NSString stringWithFormat:@"%@", [message.attachments[0] valueForKey:@"ID"]]];
if (imageData) {
dispatch_async(dispatch_get_main_queue(), ^{
UIImage *image = [UIImage imageWithData:imageData];
UIImageView *cellImage = [[UIImageView alloc] init];
[self.backgroundImageView setFrame:CGRectMake(padding/2, padding+5, 140, 140)];
cellImage.frame = CGRectMake(13, 7, 120, 120);
[cellImage setContentMode:UIViewContentModeScaleAspectFill];
cellImage.layer.cornerRadius = 5;
cellImage.clipsToBounds = YES;
cellImage.image = image;
self.timeLabel.frame = CGRectMake(20, self.backgroundImageView.frame.size.height + 20, 80, 20);
self.timeLabel.text = [NSString stringWithFormat:@"%@", time];
[self.timeLabel setFont:[UIFont systemFontOfSize:10.0]];
[self.timeLabel setTextColor:[UIColor blackColor]];
[self.contentView addSubview:self.timeLabel];
self.nameAndDateLabel.textAlignment = NSTextAlignmentLeft;
QBUUser *sender = [ChatService shared].usersAsDictionary[@(message.senderID)];
NSInteger loginForColor = [sender.login integerValue];
loginForColor = loginForColor % 255;
self.nameAndDateLabel.text = [NSString stringWithFormat:@"%@", sender.fullName];
self.backgroundImageView.image = orangeBubble;
[self.backgroundImageView addSubview:cellImage];
[self.contentView addSubview:self.backgroundImageView];
});
} else {
// downloads the image and displays as above
}
}
}
【问题讨论】：
-
你需要显示两个
configureCellWithXXX:方法。 -
ImageCellIdentifier 和 ChatMEssageCellIdentifier 是两个独立的 xib 吗？
-
我添加了 configureCellWithImage 方法供您查看。谢谢！
标签： ios objective-c uitableview quickblox