Issue While Finding Height of UITableViewCell

Question

I am calculating height of Cell programatically in heightForRowAtIndexPath-

My complete method is:

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    id cell = [self.tableView dequeueReusableCellWithIdentifier:kCellID];

    if([cell isKindOfClass:[Custom class]])
    {
        return 100;
    }
    else
    {
         return 20;
    }
}

My app takes 3-5 sec to Show the ViewController. Although cellForRowAtIndexPath is called and I can show the logs in Console.

But My ViewController not loaded.

When just return the height using this code app works fine:

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{

    return 100;
}

I don't know that is the issue with this line:

id cell = [self.tableView dequeueReusableCellWithIdentifier:kCellID];

What I am missing in this issue?

see this http://stackoverflow.com/questions/18206448/how-can-i-get-the-height-of-a-specific-row-in-my-uitableview and http://stackoverflow.com/questions/13968316/get-uitableviewcells-height-after-setting-height-for-each-uitableviewcell — Anbu.Karthik, Aug 05 '16 at 08:55
@Anbu.Karthik I need to find the type of cell as I have two type of cell. that's the main issue. Whenever i use the code to find the type of cell my app start making delays — Rahul, Aug 05 '16 at 08:58
Why don't you use a property isTableViewWithCustomCells or isTableViewWithOtherCustomCells? It should be faster. and I think that `heightForRowAtIndexPath:` may be called before cellForRowAtIndexPath and the dequeue stuff. — Larme, Aug 05 '16 at 09:00
see this http://stackoverflow.com/questions/5254723/how-to-obtain-the-uitableviewcell-within-heightforrowatindexpath — Anbu.Karthik, Aug 05 '16 at 09:02
some times `heightForRowAtIndexPath` call before cellForRowAtIndexPath then what? — Prashant Tukadiya, Aug 05 '16 at 09:02
@Larme Thanks for your approach. Why haven't I thought this way . — Rahul, Aug 05 '16 at 09:10
well I can't see where you are getting height of cell heightForRowAtIndexPath will setup height for row in tableview. — Saad Chaudhry, Aug 05 '16 at 12:59
and why you are setting fixed height for cells, if you want to change height give it dynamic height instead. Calculate height and assign to heightForRowAtIndexPath. — Saad Chaudhry, Aug 05 '16 at 13:05
see answer over here. http://stackoverflow.com/questions/38785870/set-dynamic-width-and-height-of-collection-view-cell/38789275#38789275 — Saad Chaudhry, Aug 05 '16 at 13:06

score 0 · Answer 1 · answered Aug 05 '16 at 13:03

0

You have some logic in the cellForRowAtIndexPath: method that determines what type of cell that row should be. Add that logic into the heightForRowAtIndexPath: method to determine the what the height of each row should be.

answered Aug 05 '16 at 13:03

MSU_Bulldog

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score 0 · Answer 2 · answered Jan 12 '17 at 09:37

Your this line is wrong

id cell = [self.tableView dequeueReusableCellWithIdentifier:kCellID];

it will force your cell to reuse.

Use

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    id cell=[tableView cellForRowAtIndexPath:indexPath];

    if([cell isKindOfClass:[CustomCellClass class]])
    {
        return 100;
    }
    else
    {
         return 20;
    }
}

Issue While Finding Height of UITableViewCell

2 Answers2