ios - Xcode 8 iOS 10 UITableView 问题 : UIImageView added from storyboard is rendering until table is scrolled

Question

我的 Storyboard 中有表格 View ，它一直工作到 Xcode 7.3，将 Xcode 更新到 8 后，在您滚动或显式调用 reloadData 之前，添加到 tableviewcell 中的 ImageView 不会第一次呈现。 ImageView 是从 Storyboard添加的。

滚动后

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
ALContactCell *contactCell;

switch (indexPath.section)
{
    case 0:
    {
        //Cell for group button....
        contactCell = (ALContactCell *)[tableView dequeueReusableCellWithIdentifier:@"groupCell"];

        //Add group button.....
        UIButton *newBtn = (UIButton*)[contactCell viewWithTag:101];
        [newBtn addTarget:self action:@selector(createGroup:) forControlEvents:UIControlEventTouchUpInside];
        newBtn.userInteractionEnabled = YES;

    }break;

    case 1:
    {
        //Add rest of messageList
        contactCell = (ALContactCell *)[tableView dequeueReusableCellWithIdentifier:@"ContactCell"];

        [contactCell.mUserNameLabel setFont:[UIFont fontWithName:[ALApplozicSettings getFontFace] size:USER_NAME_LABEL_SIZE]];
        [contactCell.mMessageLabel setFont:[UIFont fontWithName:[ALApplozicSettings getFontFace] size:MESSAGE_LABEL_SIZE]];
        [contactCell.mTimeLabel setFont:[UIFont fontWithName:[ALApplozicSettings getFontFace] size:TIME_LABEL_SIZE]];
        [contactCell.imageNameLabel setFont:[UIFont fontWithName:[ALApplozicSettings getFontFace] size:IMAGE_NAME_LABEL_SIZE]];

        contactCell.unreadCountLabel.backgroundColor = [ALApplozicSettings getUnreadCountLabelBGColor];
        contactCell.unreadCountLabel.layer.cornerRadius = contactCell.unreadCountLabel.frame.size.width/2;
        contactCell.unreadCountLabel.layer.masksToBounds = YES;

        //contactCell.mUserImageView.hidden = NO;
        contactCell.mUserImageView.layer.cornerRadius = contactCell.mUserImageView.frame.size.width/2;
        contactCell.mUserImageView.layer.masksToBounds = YES;

        [contactCell.onlineImageMarker setBackgroundColor:[UIColor clearColor]];

        UILabel* nameIcon = (UILabel*)[contactCell viewWithTag:102];
        nameIcon.textColor = [UIColor whiteColor];

        ALMessage *message = (ALMessage *)self.mContactsMessageListArray[indexPath.row];

        ALContactDBService *contactDBService = [[ALContactDBService alloc] init];
        ALContact *alContact = [contactDBService loadContactByKey:@"userId" value: message.to];

        ALChannelDBService * channelDBService =[[ALChannelDBService alloc] init];
        ALChannel * alChannel = [channelDBService loadChannelByKey:message.groupId];

        if([message.groupId intValue])
        {
            ALChannelService *channelService = [[ALChannelService alloc] init];
            [channelService getChannelInformation:message.groupId orClientChannelKey:nil withCompletion:^(ALChannel *alChannel)
            {
                contactCell.mUserNameLabel.text = [alChannel name];
                contactCell.onlineImageMarker.hidden=YES;
            }];
        }
        else
        {
            contactCell.mUserNameLabel.text = [alContact getDisplayName];
        }

        contactCell.mMessageLabel.text = message.message;
        contactCell.mMessageLabel.hidden = NO;

        if ([message.type integerValue] == [FORWARD_STATUS integerValue])
            contactCell.mLastMessageStatusImageView.image = [ALUtilityClass getImageFromFramworkBundle:@"mobicom_social_forward.png"];
        else if ([message.type integerValue] == [REPLIED_STATUS integerValue])
            contactCell.mLastMessageStatusImageView.image = [ALUtilityClass getImageFromFramworkBundle:@"mobicom_social_reply.png"];

        BOOL isToday = [ALUtilityClass isToday:[NSDate dateWithTimeIntervalSince1970:[message.createdAtTime doubleValue]/1000]];
        contactCell.mTimeLabel.text = [message getCreatedAtTime:isToday];

        [self displayAttachmentMediaType:message andContactCell:contactCell];

        // here for msg dashboard profile pic

        [nameIcon setText:[ALColorUtility getAlphabetForProfileImage:[alContact getDisplayName]]];

        if([message getGroupId])
        {
            [contactCell.onlineImageMarker setHidden:YES];
        }
        else if(alContact.connected && [ALApplozicSettings getVisibilityForOnlineIndicator])
        {
            [contactCell.onlineImageMarker setHidden:NO];
        }
        else
        {
            [contactCell.onlineImageMarker setHidden:YES];
        }

        if(alContact.block || alContact.blockBy)
        {
            [contactCell.onlineImageMarker setHidden:YES];
        }

        BOOL zeroContactCount = (alContact.unreadCount.intValue == 0  ? true:false);
        BOOL zeroChannelCount = (alChannel.unreadCount.intValue == 0  ? true:false);

        if(zeroChannelCount || zeroContactCount)
        {
            contactCell.unreadCountLabel.text = @"";
            [contactCell.unreadCountLabel setHidden:YES];
        }

        if(!zeroContactCount && [alContact userId] && (message.groupId.intValue == 0 || message.groupId == NULL)){
            [contactCell.unreadCountLabel setHidden:NO];
            contactCell.unreadCountLabel.text=[NSString stringWithFormat:@"%i",alContact.unreadCount.intValue];
        }
        else if(!zeroChannelCount && [message.groupId intValue]){
            [contactCell.unreadCountLabel setHidden:NO];
            contactCell.unreadCountLabel.text = [NSString stringWithFormat:@"%i",alChannel.unreadCount.intValue];
        }

        contactCell.mUserImageView.backgroundColor = [UIColor whiteColor];
        if([message.groupId intValue])
        {

            [contactCell.mUserImageView setImage:[ALUtilityClass getImageFromFramworkBundle:@"applozic_group_icon.png"]];
            NSURL * imageUrl = [NSURL URLWithString:alChannel.channelImageURL];
            if(imageUrl)
            {
                [contactCell.mUserImageView sd_setImageWithURL:imageUrl];
            }

            nameIcon.hidden = YES;
        }
        else if(alContact.contactImageUrl)
        {
            NSURL * theUrl1 = [NSURL URLWithString:alContact.contactImageUrl];
            [contactCell.mUserImageView sd_setImageWithURL:theUrl1];
            nameIcon.hidden = YES;
        }
        else
        {
            nameIcon.hidden = NO;
            [contactCell.mUserImageView sd_setImageWithURL:[NSURL URLWithString:@""]];
            contactCell.mUserImageView.backgroundColor = [ALColorUtility getColorForAlphabet:[alContact getDisplayName]];
        }

    }break;

    default:
        break;
    }

    return contactCell;
}

Answer 1

经过长期的打击和试验，更新后它起作用了

dispatch_async(dispatch_get_main_queue(), ^{
 contactCell.mUserImageView.layer.cornerRadius = contactCell.mUserImageView.frame.size.width/2;
 contactCell.mUserImageView.layer.masksToBounds = YES; 
});

或您可以使用上下文图形来获取圆形图像但还是需要事先解决