iOS UITableView numberOfRowsInSection in tableView

问题:

I have receive a EXC Bad Access error when I enter the if statement below [tableView numberOfRowsInSection:0].I'm calculating the tableView numberOfRowsInSection of the UITableView inside the heightForRowAtIndexPath .

I have got following code to set height for last row of first section

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

        if (indexPath.section==0) {
            NSInteger lastRowIndex = [tableView numberOfRowsInSection:0] - 1;

            if (indexPath.row==lastRowIndex) {
                return 44.0f;

            }else{
                return 100;

            }

        }else{

            return 100;
        }


}

I got the error as below image

I didnt find this method appropriate

iOS UITableView numberOfRowsInSection BAD ACCESS

- (int) myNumberOfRowsMethod{
    // Here you would usually have some underlying model 
    return [self.myContactsOrWhateverArray count];
}

回答1:

Try this method [self tableView:tableView numberOfRowsInSection:0] instead of [tableView numberOfRowsInSection:0]. It's works fine.

回答2:

Update your code to following

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

        if (indexPath.section==0) {
            NSInteger lastRowIndex = [self numberOfRowsInSection:indexPath.section] - 1;

            if (indexPath.row==lastRowIndex) {
                return 44.0f;

            }else{
                return 100;

            }

        }else{

            return 100;
        }
}

回答3:

Please Try With This. Make one Global NSinteger firstSectionCount; and then try with this.

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
if (section==0){
    firstSectionCount = [ storeArr count];
    return [ storeArr count]+1;
}else{
    return [ [[itemArr objectAtIndex:section-1]   objectForKey:@"itemList"]count];
}

and then,,,,

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
if (indexPath.section==0) {
    if (indexPath.row==firstSectionCount) {
        return 44.0f;

    }else{
        return 100;

    }
}
else{
      return 100;  
}

Hope this will help you...

回答4:

Try this code:

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

        if (indexPath.section==0) {
            long lastRowIndex = [self.yourArray count]-1;

            // other wise use this line
           // long lastRowIndex = [self.yourArray lastObject]-1;

            if (indexPath.row==lastRowIndex) {
                return 44.0f;

            }else{
                return 100;

            }

        }else{

            return 100;
        }
}

Because this numberOfRowsInSection not work heightForRowAtIndexPath delegate method.

回答5:

Try this..

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

    if (indexPath.section==0) {
        NSInteger lastRowIndex = yourArray.count - 1; 

        if (indexPath.row==lastRowIndex) {
            return 44.0f;

        }else{
            return 100;

        }

    }else{

        return 100;
    }
}