How to select multiple rows in UITableview - iphone

I want to select multiple rows in UITableview. I can select but my problem is when I scroll the UITableView there is an automatic selection of particular row.
I am using this code :
-(void)tableView: (UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *selectedCell = [tableView cellForRowAtIndexPath:indexPath];
if ([selectedCell accessoryType] == UITableViewCellAccessoryNone) {
[selectedCell setAccessoryType:UITableViewCellAccessoryCheckmark];
}
else {
[selectedCell setAccessoryType:UITableViewCellAccessoryNone];
}
}

Further code is use for the multiple selection in UITableview
#import "RootViewController.h"
#implementation RootViewController
#synthesize arForTable = _arForTable;
#synthesize arForIPs = _arForIPs;
- (void)viewDidLoad {
[super viewDidLoad];
self.arForTable=[NSArray arrayWithObjects:#"Object-One",#"Object-Two",#"Object-Three",#"Object-Four",#"Object-Five", nil];
self.arForIPs=[NSMutableArray array];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [self.arForTable count];
}
- (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];
}
if([self.arForIPs containsObject:indexPath]){
[cell setAccessoryType:UITableViewCellAccessoryCheckmark];
} else {
[cell setAccessoryType:UITableViewCellAccessoryNone];
}
cell.textLabel.text=[self.arForTable objectAtIndex:indexPath.row];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[tableView deselectRowAtIndexPath:indexPath animated:YES];
if([self.arForIPs containsObject:indexPath]){
[self.arForIPs removeObject:indexPath];
} else {
[self.arForIPs addObject:indexPath];
}
[tableView reloadData];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (void)viewDidUnload {
[super viewDidUnload];
}
- (void)dealloc {
[super dealloc];
}
#end
For more details regrading multiple selection Please Refer following link here.

You can have a look on the following article.
http://www.iphonedevsdk.com/forum/iphone-sdk-tutorials/3481-uitableview-tutorial-part-2-a.html

Related

UITableViewCell keeps getting deselected

I have a strange problem with UITableView:
My tableview shows the names of objects from which the user can select one. The value is saved. When the tableview comes up the row is selected (in cellForRowAtIndexPath). But in viewWillAppear the row is first selected and then deselected. You can see that it is first selected because of a the blue background occurs for a short time.
I have set
self.clearsSelectionOnViewWillAppear = NO;
but that does not work ether. Can someone help me out please! Thanks in advance.
Here some sample code:
#import "ECTESTTableViewController.h"
#interface ECTESTTableViewController ()
#end
#implementation ECTESTTableViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.clearsSelectionOnViewWillAppear = NO;
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return 8;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (!cell)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
// cell.selectionStyle = UITableViewCellSelectionStyleNone;
//cell.backgroundColor = [UIColor redColor];
}
if (indexPath.row == 1)
{
// cell.accessoryType = UITableViewCellAccessoryCheckmark;
NSLog(#"select %d", indexPath.row);
cell.selected = TRUE;
}
else {
// cell.accessoryType = UITableViewCellAccessoryNone;
cell.selected = FALSE;
}
cell.textLabel.text = [NSString stringWithFormat:#"row %d", indexPath.row];
return cell;
}
#end
If you want to programatically select a row in a UITableView use:
- (void)selectRowAtIndexPath:(NSIndexPath *)indexPath animated:(BOOL)animated scrollPosition:(UITableViewScrollPosition)scrollPosition
Don't be setting the selected states of the cells.
Write following code
NSIndexPath *indexPath = [tableView indexPathForSelectedRow];
[tableView selectRowAtIndexPath:indexPath animated:NO scrollPosition: UITableViewScrollPositionNone];

display data in UITableView on view navigation

i have 2 views-view1 and view2, one for entering data and another for displaying the entered data.
I am able to display the entered data in view2 in labels. But how to display the data in a UITableView. Following is my code to display the data:
view2.m
#synthesize details; //details is an object of NSMutableArray.
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
textLabel.text = self.name;
lblCity.text = self.city;
lblGender.text = self.gender;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [details count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = #"SimpleTableItem";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
cell.textLabel.text = [details objectAtIndex:indexPath.row];
//cell.imageView.image = [UIImage imageNamed:#"creme_brelee.jpg"];
return cell;
i debuuged and found that cellForRowAtIndexPath is never called.
Where am i getting wrong? How do i solve it?
You need to create a NSMutableArray of display Data in to UITableViewCell like below and don't forget to declare UITableView delegates in .h file <UITableViewDataSource,UITableViewDelegate> and also connect your UITableView IBOutlet in your xib and also connect the delegate:
- (void)viewDidLoad
{
[super viewDidLoad];
arrCategorisation=[[NSMutableArray alloc] initWithObjects:#"DataOne",#"DataTwo",#"DataThree", #"DataFour",#"DataFive",nil];
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return arrCategorisation.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *CellIdentifier =[NSString stringWithFormat:#"%d",indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
cell.textLabel.text=[arrCategorisation objectAtIndex:indexPath.row];
}
// Configure the cell...
return cell;
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
}
your Table load data like:-

UITableView Cells get reordered after editing the cell

In my app, You can tap a cell, and it brings up a new view. You can edit the tableviewCell's textLabel, and save it. But when you switch views and come back to the tableView, the cells are in a different order. What could be the reason for this?
Here is my Code:
-(UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString * identifier = #"identifier";
self.cell = [tableView dequeueReusableCellWithIdentifier:identifier];
h = [self.tableArray objectAtIndex:indexPath.row];
NSString *brandModel = [[h.brand stringByAppendingString:#" "] stringByAppendingString:h.model];
self.cell.mainLabel.text = brandModel;
self.cell.nicknameLabel.text = handguns.nickname;
return self.cell;
}
If you are reloading tableView after saving UITableView cell then It will be reordered as initial because array from which you are setting cell data is as it is.You can change only table View cells not array data position in an array.
Below I have written a UITableView code to move cells and it is working fine after pushing view.If I remove reload method from viewWillAppear:
#import "MoveCellViewController.h"
#interface MoveCellViewController ()
#end
#implementation MoveCellViewController
- (void)viewDidLoad
{
UIBarButtonItem *left=[[UIBarButtonItem alloc] initWithTitle:#"Edit" style:UIBarButtonItemStyleBordered target:self action:#selector(edit)];
self.navigationItem.leftBarButtonItem=left;
myArray=[[NSMutableArray alloc]init]; //mutable array;
myArray=[NSMutableArray arrayWithObjects:#"Aman",#"Ankit",#"Sumit",#"Hercules",#"Jackie Chan", nil];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
-(void)edit
{
if (self.navigationItem.leftBarButtonItem.title==#"Edit") {
self.navigationItem.leftBarButtonItem.title=#"Done";
[_tableView setEditing:YES];
}else
{
[_tableView setEditing:NO];
self.navigationItem.leftBarButtonItem.title=#"Edit";
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [myArray count];
}
// Row display. Implementers should *always* try to reuse cells by setting each cell's reuseIdentifier and querying for available reusable cells with dequeueReusableCellWithIdentifier:
// Cell gets various attributes set automatically based on table (separators) and data source (accessory views, editing controls)
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier=#"cellIdentifier";
UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (cell==nil) {
cell=[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
}
cell.userInteractionEnabled=YES;
cell.textLabel.text=[myArray objectAtIndex:indexPath.row];
return cell;
}
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
return YES;
}
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{
return UITableViewCellEditingStyleNone;
}
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath{
id ob = [myArray objectAtIndex:destinationIndexPath.row];
[myArray replaceObjectAtIndex:destinationIndexPath.row withObject:[myArray objectAtIndex:sourceIndexPath.row]];
[myArray replaceObjectAtIndex:sourceIndexPath.row withObject:ob];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NextViewController *nx=[[NextViewController alloc] init];
[self.navigationController pushViewController:nx animated:YES];
}
#end
This is working code and will not change after push view controller.
-(UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
NSString *CellIdentifier = [NSString stringWithFormat:#"S%1dR%1d",indexPath.section,indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
h = [self.tableArray objectAtIndex:indexPath.row];
NSString *brandModel = [[h.brand stringByAppendingString:#" "] stringByAppendingString:h.model];
self.cell.mainLabel.text = brandModel;
self.cell.nicknameLabel.text = handguns.nickname;
return self.cell;
}
-(UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *CellIdentifier = #"Cell";
cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:nil];
}
Write rest of the code here
}

problem while getting selected value from tableview

i have 3 different arrays. 1)for ids 2)for names 3)for emailid.
i am displaying names in a tableview.
And displaying selected name with checkmark in tableview.
Now i need to get selected name id and email from the ids and emailid arrays.
And that retrieved id and emails are need to save in two different arrays.
for that my code is
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [self.sourceArray count];;
}
// 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];
}
[cell.textLabel setText:[self.sourceArray objectAtIndex:indexPath.row]];
if ([self.selectedArray containsObject:[agentemails objectAtIndex:indexPath.row]]){
NSLog(#"111111111111");
[cell setAccessoryType:UITableViewCellAccessoryCheckmark];
}
else
{
[cell setAccessoryType:UITableViewCellAccessoryNone];
}
if ([self.selected_agentid_email containsObject:[agentids objectAtIndex:indexPath.row]]){
NSLog(#"222222222222");
[cell setAccessoryType:UITableViewCellAccessoryCheckmark];
}
else
{
[cell setAccessoryType:UITableViewCellAccessoryNone];
}
if(myBoolean){
[cell setAccessoryType:UITableViewCellAccessoryCheckmark];
}
return cell;
}
#pragma mark -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if ([self.selectedArray containsObject:[agentemails objectAtIndex:indexPath.row]]){
NSLog(#"33333333333333");
[self.selectedArray removeObjectAtIndex:[self.selectedArray indexOfObject:[agentemails objectAtIndex:indexPath.row]]];
}
else
{
[self.selectedArray addObject:[agentemails objectAtIndex:indexPath.row]];
}
if ([self.selected_agentid_email containsObject:[agentids objectAtIndex:indexPath.row]]){
NSLog(#"4444444444444444");
[self.selected_agentid_email removeObjectAtIndex:[self.selected_agentid_email indexOfObject:[agentids objectAtIndex:indexPath.row]]];
}
else
{
[self.selected_agentid_email addObject:[agentids objectAtIndex:indexPath.row]];
}
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationNone];
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
but the problem i am getting is,
eg: if i select 3 names in a tableview i am able to retrieve only one emailid and 3 ids.
i did n't get what's problem is.
can any one please help me.
Thank u in advance.
This may not be the solution you were looking for but I would recommend creating a class to store those values so you only have to work with an array of all values and an array of selected values. This will greatly decrease the complexity of working with several arrays. I have not actually tested the following code but this will be sort of what it would like.
//Agent.h
#interface Agent : NSObject
{
NSString *_name;
NSString *_aID;
NSString *_email;
}
#property(retain) NSString *name;
#property(retain) NSString *aID;
#property(retain) NSString *email;
#end
//Agent.m
#implementation Agent
#synthesize name = _name;
#synthesize aID = _aID;
#synthesize email = _email;
- (void) dealloc
{
[_name release];
[_aID release];
[_email release];
[super dealloc];
}
#end
//Your selection code will then look like this
-(void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
Agent *agent = (Agent*)[self.allAgents objectAtIndex:indexPath.row];
if (UITableViewCellAccessoryCheckmark == cell.accessoryType) {
[self.selectedAgents removeObject:agent];
cell.accessoryType = UITableViewCellAccessoryNone;
}
else {
[self.selectedAgents addObject:agent];
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
//All 3 values are guaranteed to be there
NSLog(#"Agent: %# %# %#", agent.name, agent.aID, agent.email);
}

UITableViewCell reloadcellsAtIndexPaths increases the height of the following cell but not the actual one

[self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:[NSIndexPath indexPathForRow:0 inSection:0]] withRowAnimation:UITableViewRowAnimationNone];
after this I am increasing the height of the 1st cell in heightforRowAtIndexPath. But to my surprise it is increasing the height of the second cell, but when I scroll the table view... the height of the first one is set back to desired.
If I reload the entire table using [tv reloaddata] it works fine.. does not work only if i do the particular cell
Any help on this would be helpful..
As written in the comments above, I only have a vague understanding about what you want to achieve. I assume you want to extend cell by changing their height. You just mention the first cell, but I guess, you want to be able, to do it for any cell when being clicked.
The complete project is available at github
.h
#import <UIKit/UIKit.h>
#interface FirstViewController : UITableViewController <UITableViewDelegate, UITableViewDataSource> {
NSIndexPath *selectedIndexPath;
NSDictionary *articles;
}
#end
.m
#import "FirstViewController.h"
#implementation FirstViewController
- (void)viewDidLoad {
[super viewDidLoad];
selectedIndexPath = nil;
articles = [[NSDictionary dictionaryWithObject:[NSArray arrayWithObjects:#"one", #"two", #"three",
#"four", #"five", #"six",
#"seven", #"eight", #"nine",
#"ten", #"eleven", nil]
forKey:#"title"] retain];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (void)viewDidUnload {
}
- (void)dealloc {
[selectedIndexPath release];
[articles release];
[super dealloc];
}
- (int)numberOfSectionsInTableView:(UITableView *)tableView
{
return [[articles allKeys] count];
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
return [[articles allKeys] objectAtIndex : section];
}
- (int)tableView:(UITableView *)table numberOfRowsInSection:(NSInteger)section
{
id key = [[articles allKeys] objectAtIndex:section];
return [[articles objectForKey : key] count];
}
- (float)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if ((selectedIndexPath != nil) && (selectedIndexPath.row == indexPath.row))
return 80.0;
return 40.0;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString * MyIdentifier = #"MyIdentifier";
UITableViewCell * cell = [self.tableView dequeueReusableCellWithIdentifier:MyIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:MyIdentifier] autorelease];
}
id key = [[articles allKeys] objectAtIndex:indexPath.section];
cell.textLabel.text = [[articles objectForKey:key] objectAtIndex:indexPath.row];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (selectedIndexPath == indexPath) {
selectedIndexPath = nil;
} else {
selectedIndexPath = indexPath;
}
[self.tableView deselectRowAtIndexPath : indexPath animated : NO];
[tableView beginUpdates];
[tableView endUpdates];
}
#end
This code is quite rough, as I just extracted it from a project in my very early iPhone-days. i.e. properties are missing.