xcode 将最后一个单元格添加到 UItableview
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Add a last cell to UItableview
提问by Neelesh
I have a UITableViewwhose datasource is a NSMutableArray. The array consists of a set of objects. All the cells are displayed in proper order.
我有一个UITableView ，其数据源是NSMutableArray。该数组由一组对象组成。所有单元格都以正确的顺序显示。
Now I want to know how to display a last cell always with some text alone which is not there in the datasource array.
现在我想知道如何显示最后一个单元格，并且总是单独显示一些文本，而这些文本不在数据源数组中。
I hope i am clear enough :)
我希望我足够清楚:)
EDIT :----------
编辑 ： - - - - -
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
// Return the number of rows in the section.
//+1 to add the last extra row
return [appDelegate.list count]+1;
}
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
NSUInteger index=[indexPath row];
if(index ==([appDelegate.list count]+1)) {
cell.textLabel.text = [NSString stringWithFormat:@"extra cell"];
}else{
Item *i = (Item *) [appDelegate.list objectAtIndex:indexPath.row];
cell.textLabel.text = [NSString stringWithFormat:@"%@ (%d %@)",i.iName, i.iQty,i.iUnit];
}
cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator;
return cell;
}
but i get the NSMutableArray out of bounds exception.
但我得到 NSMutableArray 越界异常。
What could be wrong ?
有什么问题？
采纳答案by Deepak Danduprolu
Your problem is the value you are checking against index. The listhas count objects indexed 0 to count - 1. So you must check against countand not count + 1. As it is now, the request for countth row is entering the elsesection. There is no object at countin the listarray. So you are getting the error. This is the modification.
您的问题是您正在检查索引的值。在list具有计数的对象索引0计数- 1，所以，你必须核对count并没有count + 1。就像现在一样，count第 th 行的请求正在进入该else部分。没有在对象count中list阵列。所以你得到了错误。这是修改。
if(index == [appDelegate.list count] ) {
cell.textLabel.text = [NSString stringWithFormat:@"extra cell"];
}else{
Item *i = (Item *) [appDelegate.list objectAtIndex:indexPath.row];
cell.textLabel.text = [NSString stringWithFormat:@"%@ (%d %@)",i.iName, i.iQty,i.iUnit];
}
回答by Chetan Bhalara
- (NSInteger)tableView:(UITableView *)tableView
numberOfRowsInSection:(NSInteger)section
{
return [your_array count] + 1;
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *SimpleTableIdentifier = @"SimpleTableIdentifier";
UITableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier:SimpleTableIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:SimpleTableIdentifier] autorelease];
}
NSUInteger row = [indexPath row];
if (row == [your_array count])
{
cell.textLabel.text = [NSString stringWithFormat:@"Some text"];
}
else
{
cell.textLabel.text = your array object text;
}
return cell;
}
回答by saadnib
in numberOfRowInSectionreturn number of rows = your array count +1then in Cell for cellForRowAtIndexPathcheck for indexPath.row if it is equla to your array count +1then create cell that you want to add at last.
作为numberOfRowInSection回报，number of rows = your array count +1然后在 Cell 中cellForRowAtIndexPath检查 indexPath.row 如果它与您的数组相等，count +1然后创建您最后要添加的单元格。
