Auto adjust the UITableViewCell height depending on its contents - iphone

Question

I want to adjust the height of a cell depending on its contents. I know UITableViewDelegate lets you implement the
- (CGFloat) tableView: (UITableView *) tableView
heightForRowAtIndexPath: (NSIndexPath *) indexPath {
return someHeight;
}
but I do not want to hardcode the height. Is there a way to do this dynamically?

Answer 1

You have to enter some code into that method that calculates the height of the row content. Exactly what code you need to put depends entirely on what kind of content you're displaying.
For example, if you're displaying text content that may wrap across multiple lines, you're probably going to end up using one of NSString's sizeWithFont: family of methods.

Answer 2

If you want your rows to have different heights, you have to calculate every row's height.
I've met such a problem. I calculated the heights of rows according to contents parsed from a json string. here's what i did.
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
// parse json
id qWeiboContent = [self.array objectAtIndex:indexPath.row];
float totalContentHeight;
QWeiboContentModel *model = [self getQWeiboContentFromJSON:qWeiboContent];
QWeiboContentModel *subModel = nil;
totalContentHeight += model.forOrComment.heightValue; // comment text view's height
totalContentHeight += model.content.heightValue; // content text view's height
totalContentHeight += 21 * 2; // 21 is height of a label
totalContentHeight += model.imageUrl.heightValue;
totalContentHeight += CELL_CONTENT_MARGIN;
if ([model.type isEqualToString:REPOSTED]) {
id qWeiboSource = [qWeiboContent objectForKey:#"source"];
subModel = [self getQWeiboContentFromJSON:qWeiboSource];
model.source = subModel;
totalContentHeight += subModel.forOrComment.heightValue;
totalContentHeight += subModel.content.heightValue;
totalContentHeight += 21 * 2;
totalContentHeight += subModel.imageUrl.heightValue;
totalContentHeight += CELL_CONTENT_MARGIN;
}
if (self.arrayQQWeibo == nil) {
self.arrayQQWeibo = [[NSMutableArray alloc]init];
}
[self.arrayQQWeibo addObject:model];
return totalContentHeight;
}