将图像从URL加载到uiimage,然后将这些图像添加到uitableviewcell uiimageview,如下面的代码.我不知道图像大小,但需要在tableviewcell图像中强制它们为40×40.图像在uitableview中以不同的宽度加载.
阅读与uiimage大小/缩放相关的其他帖子,但这些解决方案对我不起作用.我在想它是因为我正在使用uitableviewcell中包含的uiimageview来创建我自己的uiimageview.
这是代码>
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [[UITableViewCell alloc] init];
ItemForSale *item = [listOfItems objectAtIndex:indexPath.row];
cell.textLabel.text = item.name;
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
cell.textLabel.font = [UIFont systemFontOfSize:14];
NSURL *url = [NSURL URLWithString: item.imgPath];
UIImage *thumbnail = [UIImage imageWithData: [NSData dataWithContentsOfURL:url]];
if (thumbnail == nil) {
thumbnail = [UIImage imageNamed:@"noimage.png"] ;
}
cell.imageView.image = thumbnail;
cell.imageView.contentMode = UIViewContentModeScaleAspectFill;
cell.imageView.frame = CGRectMake(0,40,40);
cell.imageView.autoresizingMask = UIViewAutoresizingNone;
cell.imageView.clipsToBounds = YES;
return cell;
}
我尝试过设置内容模式(尝试了aspectfill和aspect fit),尝试重置框架,设置autoresizingmask,clipTobound.没有一件事改变了.
解决方法
找到苹果示例项目“LazyTableImages”的答案
NSURL *url = [NSURL URLWithString: item.imgPath];
UIImage *thumbnail = [UIImage imageWithData: [NSData dataWithContentsOfURL:url]];
if (thumbnail == nil) {
thumbnail = [UIImage imageNamed:@"noimage.png"] ;
}
CGSize itemSize = CGSizeMake(40,40);
UIGraphicsBeginImageContext(itemSize);
CGRect imageRect = CGRectMake(0.0,0.0,itemSize.width,itemSize.height);
[thumbnail drawInRect:imageRect];
cell.imageView.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return cell;
