如何在 JSQMessagesviewController IOS 中从 url 加载图像答案

【问题标题】：How to load image from url in JSQMessagesviewController IOS如何在 JSQMessagesviewController IOS 中从 url 加载图像
【发布时间】：2017-01-10 13:39:11
【问题描述】：

我正在使用 JSQMessagesViewController 来显示聊天 UI。如何在聊天屏幕中显示来自 url 的图像？我已经浏览了 github 和 stackoverflow，但没有正确获得我们需要的内容？

和

https://github.com/jessesquires/JSQMessagesViewController/issues/582

欢迎提出意见

【问题讨论】：

标签： ios ios7 uikit chat jsqmessagesviewcontroller

【解决方案1】：

试试，

 ZSSMessagesAvatarImage *avatarImage = [self.avatars objectForKey:message.senderId];
if (avatarImage.url) {

    [cell.avatarImageView setImageWithURLRequest:[NSURLRequest requestWithURL:avatarImage.url] placeholderImage:nil success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {

        cell.avatarImageView.image = image;

    } failure:nil];

}
cell.avatarImageView.clipsToBounds = YES;
cell.avatarImageView.layer.cornerRadius = 22;
cell.avatarImageView.hidden = NO;

参考：https://github.com/jessesquires/JSQMessagesViewController/issues/1302

或

 if(object[PF_CHAT_PICTURE])
{
UIImageView *imageView = [[UIImageView alloc] init];
NSString *imgUrl = [object[PF_CHAT_PICTURE] valueForKey:@"url"];

UIImage *image = [[SDImageCache sharedImageCache] imageFromDiskCacheForKey:imgUrl];
if(image == nil)
{
    NSURL *imageUrl = [NSURL URLWithString:imgUrl];

    [imageView setImageWithURL:imageUrl completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType)
    {
        JSQPhotoMediaItem *mediaItem = [[JSQPhotoMediaItem alloc] initWithImage:image];
        JSQMessage *message = [[JSQMessage alloc] initWithSenderId:user.objectId senderDisplayName:user[PF_USER_FULLNAME] date:object.createdAt media:mediaItem];
        [messages addObject:message];
    }];
}
else
{
    JSQPhotoMediaItem *mediaItem = [[JSQPhotoMediaItem alloc] initWithImage:image];
    message = [[JSQMessage alloc] initWithSenderId:user.objectId senderDisplayName:user[PF_USER_FULLNAME] date:object.createdAt media:mediaItem];
}
}
else
{
message = [[JSQMessage alloc] initWithSenderId:user.objectId senderDisplayName:user[PF_USER_FULLNAME] date:object.createdAt text:object[PF_CHAT_TEXT]];
}

参考：How to send Pictures using JSQMessagesViewController?

【讨论】：

【解决方案2】：

Swift 4 上的解决方案

您可以使用库“SDWebImage”

写入方法：
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell

cell.avatarImageView.sd_setImage(with: URL(string: "YOUR_URL"))
cell.avatarImageView.sd_setShowActivityIndicatorView(true)

【讨论】：

不要忘记将单元格转换为 JSQMessagesCollectionViewCell