I was working with the tableview and I wanted the number of rows (i.e the number of items in tableview). How can I get the number of rows, if available?
Please help me out,
thanks in advance.
take a instance variable in your header file.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
yourHeaderFileVariable = [noOfItemsInArray count];
NSLog(#"total item in table %d",yourHeaderFileVariable);
return [noOfItemsInArray count];
}
or try this
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection: (NSInteger)section {
NSLog(#"total item in table %d",[noOfItemsInArray count]);
return [noOfItemsInArray count];
}
The number of rows in table view for a section is what you are returning from (NSInteger)tableView:numberOfRowsInSection:. So if you return something like [mySource count] from this method then the number of rows is [mySource count].
For example:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [data count];
}
// to get the count
NSInteger rowCount = [data count];
Now replace [data count] with whatever calculation you have in the delegate method.
You need to implement the delegate method :
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [yourArray count];
}
You can then show the result in the table header by using the following delegate method :
- (NSString *)tableView:(UITableView *)resultTableView titleForHeaderInSection:(NSInteger)section
{
NSString *str=[NSString stringWithFormat:#"%i",[yourArray count]];
str=[str stringByAppendingString:#" matches"];
return str;
}
For example, if you have 7 results in the table, the header will display the text "7 matches"
- (NSInteger)tableView:(UITableView *)tablefirst numberOfRowsInSection:(NSInteger)section {
int count;
count=0;
count=[*your array name* count];
NSLog(#"row count=%d",count);
return [*your array name* count];
}
This function returns the number rows(items) in your tableview
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [listOfItems count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return numberOfRows;
}
Related
I have a UITableView for which I have listed the code below.
How do I section these objects out such as the following shown below?
Math
Algebra
Geometry
Calculus
Science
Integrated 1
Integrated 2
Here is the code:
- (void)viewDidLoad {
NSArray *array = [[NSArray alloc] initWithObjects:#"Math",#"Science",#"English",#"Social Studies",#"Spanish",#"German",#"French",#"Biology",nil];
self.listData = array;
[array release];
[super viewDidLoad];
}
You have to use sectioned table view, that is the best way to achieve this. You can refer following tutorial for the same - http://www.xcode-tutorials.com/uitableview-–-3-sectioned-table-view/
In your UITableViewDataSource of UITableView object;
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return array.count;
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
return [array objectAtIndex:section];
}
will do the 'sectioning' part for your case.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [yourarray count];
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
return [yourarray objectAtIndex:section];
}
How can I manage different no of the rows in different no of sections ? no of rows & sections are not fixed depends on another table view in other class.Suppose If xxx section Header then it contains 5 rows ,another section header contain 4 rows. section header is the account title in table view from other class
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 3; or [yourarray count] // 3 sections 0,1,2
}
For different numver of rows in diffrent sections
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the sections.
if( section == 0) // first section with 5 rows
return [[yourarray objectAtIndex:section] count];
if( section == 1) // 2nd section with 4 rows
return [[yourarray objectAtIndex:section] count];
if( section == 2) // 3rd section with 57rows
return [[yourarray objectAtIndex:section] count];
}
In table view delegate method; it has:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return data.count;
}
and
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return [data objectAtIndex:section].count;
}
You can set your sections number and rows number in those two methods.
Of course you have to also configure your data to two dimension array.
Hope it helps:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if( section == 0)
return [array count];
if( section == 1)
return [array2 count];
if( section == 2)
return [array3 count];
}
Its Really Simple , Use below tableView delegates-
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// return your another table view's array count here, on which no of sections depends.
}
// Customize the number of rows in the table view.
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// use like this
int noOfRows = 0;
if(section == 0)
{
noOfRows = x;
}
else if(section ==1)
{
noOfRows = y;
}
.
.
.
else
{
noOfRows = z;
}
return noOfRows;
}
x, y, z are NSInteger here
Try this
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
if (section == 0){
return 5;
}
if (section == 1){
return 10;
}
//etc.
}
I am trying to make an app in which i use the Grouped Table view .In that I am creating the sections in which the first letter comes from an array and it is doing perfectly.
the code is below
sections=[[NSMutableArray alloc] init];
for(int i=0;i<[PdfNames count]; i++)
{
NSString *s=[[PdfNames objectAtIndex:i] substringToIndex:1];
NSPredicate *p=[NSPredicate predicateWithFormat:#"letter like '%#'",s];
NSArray *check=[sections filteredArrayUsingPredicate:p];
if([check count]<1)
{
dict=[[[NSMutableDictionary alloc] init] autorelease];
[dict setValue:s forKey:#"letter"];
[sections addObject:dict];
}
}
But now i am not able to get that hoe can i get the names of pdf from array which belongs to their secion Or starts with that alphabet.
You are creating an array sections which is of course empty. You then create an array check based on sections. It will therefore also be empty. [check count] will always be zero. No NSDictionary is going to be created.
Clear?
Try following code its basic logic, I hope you can understand.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if(section == 0) {
return 10; // Number of rows in section.
} else if (section == 1) {
return 5;
}
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 2; // Let say we have two section.
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell;
if (indexPath.section == 0) {
// Assign your data
} else if (section == 1) {
// Assign your data
}
}
Similarly you can check for the table section on didSelectRowAtIndexPath: method
I am trying to create an Indexed UITableView with out the magnifying glass icon.
I realize the UITableViewIndexSearch is creating the icon in the index but I do not know what to replace it with. Any help or suggestions would be greatly appreciated.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [[self.fetchedResultsController sections] count];}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
id <NSFetchedResultsSectionInfo> sectionInfo = [[self.fetchedResultsController sections] objectAtIndex:section];
return [sectionInfo numberOfObjects];}
- (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index {
return index;}
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView {
// Return the array of section index titles
NSArray *searchArray = [NSArray arrayWithObject:UITableViewIndexSearch];
return [searchArray arrayByAddingObjectsFromArray:self.fetchedResultsController.sectionIndexTitles];}
Simply replace it with nothing. Just leave the UITableViewIndexSearch constant out of your array.
Don't add UITableViewIndexSearch in sectionIndexTitlesForTableView:. Simply return the array from your fetchedResultsController.
The data populates, but [tableView numberOfRowsInSection:0] always returns 0. There is only one section in my table. What types of things can cause this behavior?
If there is only one section always in your table, go with the following coed...
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 1;
}
Or in case your number of sections are depending on datasource, you can return the count of your datasource.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
id <NSFetchedResultsSectionInfo> sectionInfo = [[self.fetchedResultsController sections] objectAtIndex:section];
return [sectionInfo numberOfObjects];
Try this. It might help you.