UITableView select a row per section - ios

Question

I would like to make a selection like this
How can I change my
- (NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath
delegate method to work in accordance with my requirement.

Answer 1

Why so complicated? Just deselect all cells of the same section before the user selects a new one.
First allow multiple selection for your UITableView. Then implement this delegate method:
Swift 3 version:
func tableView(_ tableView: UITableView, willSelectRowAt indexPath: IndexPath) -> IndexPath?
{
for vcip in tableView.indexPathsForSelectedRows ?? [] {
if vcip.section == indexPath.section && vcip.item != indexPath.item {
tableView.deselectRow(at: vcip, animated: false)
}
}
return indexPath
}

Answer 2

Keep a property in your view controller called selectedRow, which represents the indexPath of tableview that represents the checked item in a table section.
In your view controller's -tableView:cellForRowAtIndexPath: delegate method, set the accessoryType of the cell to UITableViewCellAccessoryCheckmark if the cell's indexPath equals the selectedRow indexpath value. Otherwise, set it to UITableViewCellAccessoryNone.
In your view controller's -tableView:didSelectRowAtIndexPath: delegate method, set the selectedRow value to the indexPath.row that is selected, e.g.: self.selectedRow = indexPath.row

Answer 3

This won't be a good solution.
Use a NSMutableArray for storing the selected sections.
NSMutableArray *selectedSections; //instance variable
selectedSections= [[NSMutableArray alloc] init]; //in viewDidLoad
- (NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSNumber *section = [NSNumber numberWithInt:indexPath.section];
if([selectedSections containsObject:section]
return nil;
else
{
[selectedSections addObject:section];
return indexPath;
}
}
When you deselect a row write the below code there:
[selectedSections removeObject:[NSNumber numberWithInt:indexPath.section]];

Answer 4

LimeRed has a great answer elsewhere in this thread, but it is not complete. The key issue is that the OP needs to have the accessory checkmark removed. Simply calling deselectRow will not remove the checkmark. Per the documentation, deselectRow does not call the delegate method tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) where the removal of the checkmark code might be located. Therefore you need handle this removal as part of the code that LimeRed wrote.
Here is a more complete implementation that removes the accessory checkmark again based on LimeRed's solution:
func tableView(_ tableView: UITableView, willSelectRowAt indexPath: IndexPath) -> IndexPath?
{
for path in tableView.indexPathsForSelectedRows ?? []
{
if path.section == indexPath.section && path.item != indexPath.item
{
let cell = tableView.cellForRow(at: path)
cell?.accessoryType = UITableViewCellAccessoryType.none
tableView.deselectRow(at: path, animated: false)
}
}
return indexPath
}

Answer 5

try like this,
In .h
#property (nonatomic, retain) NSIndexPath *checkedIndexPath;
In .m
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if(indexPath.section==0)
{
// to check and Uncheck the row
if(self.checkedIndexPath)
{
UITableViewCell* uncheckCell = [tableView1
cellForRowAtIndexPath:self.checkedIndexPath];
uncheckCell.accessoryType = UITableViewCellAccessoryNone;
}
if([self.checkedIndexPath isEqual:indexPath])
{
self.checkedIndexPath = nil;
}
else
{
UITableViewCell* cell = [tableView1 cellForRowAtIndexPath:indexPath];
cell.accessoryType = UITableViewCellAccessoryCheckmark;
self.checkedIndexPath = indexPath;
}
}
}

Answer 6

This one's gonna be ViewController.h
#interface ViewController : UITableViewController
{
NSMutableArray *list;
NSMutableArray *sectionList;
NSIndexPath *oldIndexPath0;
int row0;
NSIndexPath *oldIndexPath1;
int row1;
NSIndexPath *oldIndexPath2;
int row2;
NSIndexPath *oldIndexPath3;
int row3;
NSString *othersString;
NSString *timeString;
NSString *pRoomString;
NSString *parkingString;
NSString *smokingString;
NSString *select0;
NSString *select1;
NSString *select2;
NSString *select3;
}
#end
This one's ViewController.m
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
- (void)viewWillAppear:(BOOL)animated
{
// initial row by 100;
row0 = 100;
row1 = 100;
row2 = 100;
row3 = 100;
// initial strings by #”"
othersString = [NSString stringWithFormat:#""];
timeString = [NSString stringWithFormat:#""];
pRoomString = [NSString stringWithFormat:#""];
parkingString = [NSString stringWithFormat:#""];
smokingString = [NSString stringWithFormat:#""];
select0 = #"";
select1 = #"";
select2 = #"";
select3 = #"";
// Get row index
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *fileName = [NSHomeDirectory() stringByAppendingPathComponent:#"tmp/rowString.txt"];
NSData *rowData = [fileManager contentsAtPath:fileName];
// From NSData to NSString
NSString *rowString = [[NSString alloc] initWithData:rowData encoding:NSUTF8StringEncoding];
if (rowString) {
// spit row string
NSArray *rowArray = [rowString componentsSeparatedByString:#":"];
for (int i=0; i<[rowArray count]; i++) {
NSString *indexVal = [rowArray objectAtIndex:i];
if ([indexVal length] != 0) {
// set row value
if (i == 0) {
NSString *row0Str = [rowArray objectAtIndex:0];
row0 = [row0Str intValue];
}
if (i == 1) {
NSString *row1Str = [rowArray objectAtIndex:1];
row1 = [row1Str intValue];
}
if (i == 2) {
NSString *row2Str = [rowArray objectAtIndex:2];
row2 = [row2Str intValue];
}
if (i == 3) {
NSString *row3Str = [rowArray objectAtIndex:3];
row3 = [row3Str intValue];
}
}
}
}
// Update the view with current data before it is displayed.
[super viewWillAppear:animated];
//Initialize the array.
list = [[NSMutableArray alloc] initWithCapacity:0];
sectionList = [[NSMutableArray alloc] initWithCapacity:0];
// section header
NSArray *sectionHeaderArray = [NSArray arrayWithObjects:#"01",#"02",#"03",#"04", nil];
NSDictionary *sectionHeaderDic = [NSDictionary dictionaryWithObject:sectionHeaderArray forKey:#"section"];
[sectionList addObject:sectionHeaderDic];
// time list
NSArray *timeArray = [NSArray arrayWithObjects:#"time 01",#"time 01",#"time 01", nil];
NSDictionary *timeDic = [NSDictionary dictionaryWithObject:timeArray forKey:#"time"];
// private room
NSArray *pRoomArray = [NSArray arrayWithObjects:#"room 01",#"room 02", nil];
NSDictionary *pRoomDic = [NSDictionary dictionaryWithObject:pRoomArray forKey:#"pRoom"];
// parking
NSArray *parkingArray = [NSArray arrayWithObjects:#"park 01",#"park 02",#"park 03", nil];
NSDictionary *parkingDic = [NSDictionary dictionaryWithObject:parkingArray forKey:#"parking"];
// smoking
NSArray *smokingArray = [NSArray arrayWithObjects:#"smoke 01",#"smoke 02",#"smoke 03", nil];
NSDictionary *smokingDic = [NSDictionary dictionaryWithObject:smokingArray forKey:#"smoking"];
// add all dictionary to list
[list addObject:timeDic];
[list addObject:pRoomDic];
[list addObject:parkingDic];
[list addObject:smokingDic];
// Scroll the table view to the top before it appears
[self.tableView reloadData];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
//Number of section
return [list count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
//Get the dictionary object
NSDictionary *dictionary = [list objectAtIndex:section];
NSArray *array;
switch (section) {
case 0:
// time array
array = [dictionary objectForKey:#"time"];
break;
case 1:
// pRoom array
array = [dictionary objectForKey:#"pRoom"];
break;
case 2:
// parking array
array = [dictionary objectForKey:#"parking"];
break;
case 3:
// smoking array
array = [dictionary objectForKey:#"smoking"];
break;
default:
break;
}
//Number of rows
return [array count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Budget";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
UITableViewCellStyleSubtitle;
}
//Get the dictionary object
NSDictionary *dictionary = [list objectAtIndex:indexPath.section];
NSArray *array;
switch (indexPath.section) {
case 0:
// time array
array = [dictionary objectForKey:#"time"];
if (indexPath.row == row0 ) {
cell.accessoryType=UITableViewCellAccessoryCheckmark;
}else{
cell.accessoryType = UITableViewCellAccessoryNone;
}
break;
case 1:
// pRoom array
array = [dictionary objectForKey:#"pRoom"];
if (indexPath.row == row1) {
cell.accessoryType=UITableViewCellAccessoryCheckmark;
}else{
cell.accessoryType = UITableViewCellAccessoryNone;
}
break;
case 2:
// parking array
array = [dictionary objectForKey:#"parking"];
if (indexPath.row == row2) {
cell.accessoryType=UITableViewCellAccessoryCheckmark;
}else{
cell.accessoryType = UITableViewCellAccessoryNone;
}
break;
case 3:
// smoking array
array = [dictionary objectForKey:#"smoking"];
if (indexPath.row == row3) {
cell.accessoryType=UITableViewCellAccessoryCheckmark;
}else{
cell.accessoryType = UITableViewCellAccessoryNone;
}
break;
default:
break;
}
cell.textLabel.text = [array objectAtIndex:indexPath.row];
NSLog(#"index cell");
return cell;
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
NSString *title = nil;
//Get the dictionary object
NSDictionary *dictionary = [sectionList objectAtIndex:0];
NSArray *array = [dictionary objectForKey:#"section"];
title = [array objectAtIndex:section];
return title;
}
#pragma mark -
#pragma mark Table view selection
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[tableView deselectRowAtIndexPath:[tableView indexPathForSelectedRow] animated:YES];
switch(indexPath.section)
{
case 0:
{
UITableViewCell *cell1 = [tableView cellForRowAtIndexPath:indexPath];
if ([[tableView cellForRowAtIndexPath:indexPath ] accessoryType] == UITableViewCellAccessoryCheckmark) {
cell1.accessoryType = UITableViewCellAccessoryNone;
row0 = 100;
timeString = #"";
}else {
NSIndexPath *SIndexPath0 = [NSIndexPath indexPathForRow:row0 inSection:0];
if ([[tableView cellForRowAtIndexPath:SIndexPath0 ] accessoryType] == UITableViewCellAccessoryCheckmark) {
[[tableView cellForRowAtIndexPath:SIndexPath0] setAccessoryType:UITableViewCellAccessoryNone];
}
if (oldIndexPath0 == nil) {
oldIndexPath0 = indexPath;
}
UITableViewCell *cell2 = nil;
if (oldIndexPath0 != indexPath) {
cell2 = [tableView cellForRowAtIndexPath:oldIndexPath0];
}
cell1.accessoryType = UITableViewCellAccessoryCheckmark;
if (cell2) {
cell2.accessoryType = UITableViewCellAccessoryNone;
}
//Get the dictionary object
NSDictionary *dictionary = [list objectAtIndex:indexPath.section];
NSArray *array = [dictionary objectForKey:#"time"];
timeString = [array objectAtIndex:indexPath.row];
row0 = indexPath.row;
oldIndexPath0 = nil;
}
select0 = #"marked";
break;
}
case 1:
{
UITableViewCell *cell1 = [tableView cellForRowAtIndexPath:indexPath];
if ([[tableView cellForRowAtIndexPath:indexPath ] accessoryType] == UITableViewCellAccessoryCheckmark) {
cell1.accessoryType = UITableViewCellAccessoryNone;
row1 = 100;
pRoomString = #"";
}else {
NSIndexPath *SIndexPath1 = [NSIndexPath indexPathForRow:row1 inSection:1];
if ([[tableView cellForRowAtIndexPath:SIndexPath1 ] accessoryType] == UITableViewCellAccessoryCheckmark) {
[[tableView cellForRowAtIndexPath:SIndexPath1] setAccessoryType:UITableViewCellAccessoryNone];
}
if (oldIndexPath1 == nil) {
oldIndexPath1 = indexPath;
}
UITableViewCell *cell2 = nil;
if (oldIndexPath1 != indexPath) {
cell2 = [tableView cellForRowAtIndexPath:oldIndexPath1];
}
cell1.accessoryType = UITableViewCellAccessoryCheckmark;
if (cell2) {
cell2.accessoryType = UITableViewCellAccessoryNone;
}
//Get the dictionary object
NSDictionary *dictionary = [list objectAtIndex:indexPath.section];
NSArray *array = [dictionary objectForKey:#"pRoom"];
pRoomString = [array objectAtIndex:indexPath.row];
row1 = indexPath.row;
oldIndexPath1 = nil;
}
select1 = #"marked";
break;
}
case 2:
{
UITableViewCell *cell1 = [tableView cellForRowAtIndexPath:indexPath];
if ([[tableView cellForRowAtIndexPath:indexPath ] accessoryType] == UITableViewCellAccessoryCheckmark) {
cell1.accessoryType = UITableViewCellAccessoryNone;
row2 = 100;
parkingString = #"";
}else {
NSIndexPath *SIndexPath2 = [NSIndexPath indexPathForRow:row2 inSection:2];
if ([[tableView cellForRowAtIndexPath:SIndexPath2 ] accessoryType] == UITableViewCellAccessoryCheckmark) {
[[tableView cellForRowAtIndexPath:SIndexPath2] setAccessoryType:UITableViewCellAccessoryNone];
}
if (oldIndexPath2 == nil) {
oldIndexPath2 = indexPath;
}
UITableViewCell *cell2 = nil;
if (oldIndexPath2 != indexPath) {
cell2 = [tableView cellForRowAtIndexPath:oldIndexPath2];
}
cell1.accessoryType = UITableViewCellAccessoryCheckmark;
if (cell2) {
cell2.accessoryType = UITableViewCellAccessoryNone;
}
//Get the dictionary object
NSDictionary *dictionary = [list objectAtIndex:indexPath.section];
NSArray *array = [dictionary objectForKey:#"parking"];
parkingString = [array objectAtIndex:indexPath.row];
row2 = indexPath.row;
oldIndexPath2 = nil;
}
select2 = #"marked";
break;
}
case 3:
{
UITableViewCell *cell1 = [tableView cellForRowAtIndexPath:indexPath];
if ([[tableView cellForRowAtIndexPath:indexPath ] accessoryType] == UITableViewCellAccessoryCheckmark) {
cell1.accessoryType = UITableViewCellAccessoryNone;
row3 = 100;
smokingString = #"";
}else {
NSIndexPath *SIndexPath3 = [NSIndexPath indexPathForRow:row3 inSection:3];
if ([[tableView cellForRowAtIndexPath:SIndexPath3 ] accessoryType] == UITableViewCellAccessoryCheckmark) {
[[tableView cellForRowAtIndexPath:SIndexPath3] setAccessoryType:UITableViewCellAccessoryNone];
}
if (oldIndexPath3 == nil) {
oldIndexPath3 = indexPath;
}
UITableViewCell *cell2 = nil;
if (oldIndexPath3 != indexPath) {
cell2 = [tableView cellForRowAtIndexPath:oldIndexPath3];
}
cell1.accessoryType = UITableViewCellAccessoryCheckmark;
if (cell2) {
cell2.accessoryType = UITableViewCellAccessoryNone;
}
//Get the dictionary object
NSDictionary *dictionary = [list objectAtIndex:indexPath.section];
NSArray *array = [dictionary objectForKey:#"smoking"];
smokingString = [array objectAtIndex:indexPath.row];
row3 = indexPath.row;
oldIndexPath3 = nil;
}
select3 = #"marked";
break;
}
default:
break;
}
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
// Cancle button and add an event handler
self.navigationItem.leftBarButtonItem =
[[UIBarButtonItem alloc] initWithTitle:#"Cancle"
style:UIBarButtonSystemItemCancel
target:self
action:#selector(handleCancle:)];
// Cancle button and add an event handler
self.navigationItem.rightBarButtonItem =
[[UIBarButtonItem alloc] initWithTitle:#"Use"
style:UIBarButtonItemStyleBordered
target:self
action:#selector(handleUse:)];
}
- (void) handleCancle:(id)sender
{
// pop the controller
[self.navigationController popViewControllerAnimated:YES];
}
- (void) handleUse:(id)sender{
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *fileName;
// Get row index value
fileName = [NSHomeDirectory() stringByAppendingPathComponent:#"tmp/othersString.txt"];
NSData *rowValData = [fileManager contentsAtPath:fileName];
// From NSData to NSString
NSString *rowValString = [[NSString alloc] initWithData:rowValData encoding:NSUTF8StringEncoding];
NSString *oldTimeString = #"";
NSString *oldpRoomString = #"";
NSString *oldParkingString = #"";
NSString *oldSmokingString = #"";
if (rowValString) {
// spit row string
NSArray *rowValArray = [rowValString componentsSeparatedByString:#":"];
for (int i=0; i<[rowValArray count]; i++) {
if ([rowValArray objectAtIndex:i] != #"") {
// set row value
if (i == 0 ) {
oldTimeString = [rowValArray objectAtIndex:0];
}
if (i == 1 ) {
oldpRoomString = [rowValArray objectAtIndex:1];
}
if (i == 2 ) {
oldParkingString = [rowValArray objectAtIndex:2];
}
if (i == 3) {
oldSmokingString = [rowValArray objectAtIndex:3];
}
}
}
}
if (select0 == #"") {
timeString = oldTimeString;
}
if (select1 == #"") {
pRoomString = oldpRoomString;
}
if (select2 == #"") {
parkingString = oldParkingString;
}
if (select3 == #"") {
smokingString = oldSmokingString;
}
// make othersString string
othersString = [NSString stringWithFormat:#"%#:%#:%#:%#", timeString, pRoomString, parkingString, smokingString];
// write othersString to othersString.txt file
fileName= [NSHomeDirectory() stringByAppendingPathComponent:#"tmp/othersString.txt"];
NSData *othersData = [othersString dataUsingEncoding:NSUTF8StringEncoding];
[fileManager createFileAtPath:fileName contents:othersData attributes:nil];
// make row data in string
NSString *rowString = [NSString stringWithFormat:#"%i:%i:%i:%i", row0,row1,row2,row3];
// write othersString to othersString.txt file
fileName = [NSHomeDirectory() stringByAppendingPathComponent:#"tmp/rowString.txt"];
NSData *rowData = [rowString dataUsingEncoding:NSUTF8StringEncoding];
[fileManager createFileAtPath:fileName contents:rowData attributes:nil];
// pop the controller
[self.navigationController popViewControllerAnimated:YES];
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc. that aren't in use.
}
- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)dealloc {
[super dealloc];
[list release];
}
#end
Got this stuff from this post, as this was in Japanese I changed it. Thanks to the author.

Answer 7

After a lot of modifications I have arrived with this
- (void)tableView:(UITableView *)aTableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [aTableView cellForRowAtIndexPath:indexPath];
if(indexPath.section == 0)
{
if([section1Rows count] == 0)
{
[section1Rows addObject:[NSNumber numberWithInt:indexPath.row]];
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else
{
[section1Rows removeObjectAtIndex:0];
for (UITableViewCell *cell in [tabview visibleCells]) {
cell.accessoryType = UITableViewCellAccessoryNone;
}
[section1Rows addObject:[NSNumber numberWithInt:indexPath.row]];
NSLog(#"%#",section1Rows);
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
}
if(indexPath.section == 1)
{
if([section2Rows count] == 0)
{
[section2Rows addObject:[NSNumber numberWithInt:indexPath.row]];
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else
{
[section2Rows removeObjectAtIndex:0];
for (UITableViewCell *cell in [tabview visibleCells]) {
cell.accessoryType = UITableViewCellAccessoryNone;
}
[section2Rows addObject:[NSNumber numberWithInt:indexPath.row]];
NSLog(#"%#",section2Rows);
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
}
if(indexPath.section == 2)
{
if([section3Rows count] == 0)
{
[section3Rows addObject:[NSNumber numberWithInt:indexPath.row]];
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else
{
[section3Rows removeObjectAtIndex:0];
for (UITableViewCell *cell in [tabview visibleCells]) {
cell.accessoryType = UITableViewCellAccessoryNone;
}
[section3Rows addObject:[NSNumber numberWithInt:indexPath.row]];
NSLog(#"%#",section3Rows);
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
}
}
I'll explain the problem in steps,
I have selected a row in 3 sections, If I select a row again in any of the sections... then everything goes haywire. How can I deselect the previously selected row and highlight the then selected row?
Thanks.