i am building a social App, where you can send messages - its not a chatting app, only sending objects ( i am learning to code). I want to select only one friend from my tableView and send the message to him. I also want to add my cell.accessoryView only on one cell, the selected one. When i hit another row, the last cells accessoryView gets deselected. Also disable multiple touches on one row = if i select one friend, the only way how to deselect him, is to select another cell. I also created a string and i want to add only the cell.textLabel.text from the selected cell, if i select another cell, old info gets deleted and new info added. I tried a lot of stuff, but nothing works and i didn't find any tutorial or answer :(. Does anybody have an idea, how to do this? Thank you very much for answers:
This is the lat code i tried, it works but if i toggle more than 2 times it gets corrupted
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
//checkmark is my image for custom checkmark
if (cell.accessoryView == checkmark)
{
cell.accessoryView = nil;
}
else
{
cell.accessoryView = checkmark;
}
}
add this method in your tableview class
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell * currentCell = [tableView cellForRowAtIndexPath:indexPath];
UITableViewCell * oldCell = [tableView cellForRowAtIndexPath: oldIndexPath];
oldCell.accessoryView = nil;
currentCell.accessoryView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"checkMark"]];
oldIndexPath = indexPath; // instance Variable NSIndexPath * oldIndexPath;
}
Related
I am doing using some code that I have seen work before. Essentially a user answers yes or no on a post with some buttons. Pressing yes or no updates the database, which is working correctly, and it also updates the visible UI, which is not working. This UI updates the buttons so they one is selected, other is highlighted and both are disabled for user interaction. Also it makes changes to two UILabels. The method that these buttons calls needs to update the database and retrieve the buttons from the tableViewCell and update the changes I have the methods working in another ViewController so I can not understand the difference here. Here is my cellForRowAtIndexPath
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *simpleTableIdentifier = [NSString stringWithFormat:#"%ld,%ld",(long)indexPath.section,(long)indexPath.row];
NSLog(#" simple: %#",simpleTableIdentifier);
if (indexPath.row==0) {
ProfileFirstCell *cell = [self.tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil)
{
cell = [[ProfileFirstCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:simpleTableIdentifier];
}
cell = [self createProfileCell:cell];
return cell;
}else{
YesNoCell *cell =[self.tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell==nil) {
cell=[[YesNoCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
cell = [self createYesNoCell:cell:indexPath];
return cell;
}
}
Essentially what this does is create the users profile in the first cell, and load all the questions that user asks. This is the major difference I see between the old tableView and this tableView. In createYesNoCell I create the UIElements and create tags as follows
cell.yesVoteButton.tag=indexPath.row+ yesVoteButtonTag1;
cell.noVoteButton.tag=indexPath.row+ noVoteButtonTag1;
cell.yesCountLabel.tag=indexPath.row+ yesCountLabelTag1;
cell.noCountLabel.tag=indexPath.row+ noCountLabelTag1;
The buttons have the selector that initiates a number of things. It finds which button was pressed by the following.
NSInteger index;
if(sender.tag>=yesVoteButtonTag1){
NSLog(#"Yes button pressed");
votedYes=true;
index=sender.tag-yesVoteButtonTag1;
}else{
NSLog(#"No button Pressed");
votedYes=false;
index=sender.tag-noVoteButtonTag1;
}
UILabel *yesLabel = (UILabel*) [self.tableView viewWithTag:index+yesCountLabelTag1]; // you get your label reference here
UIButton *yesButton=(UIButton *)[self.tableView viewWithTag:index+1+yesVoteButtonTag1];
NSLog(#"Tag IN METHOD: %ld",index+yesVoteButtonTag1);
UILabel *noLabel = (UILabel*) [self.tableView viewWithTag:index+1+noCountLabelTag1]; // you get your label reference here
UIButton *noButton=(UIButton *)[self.tableView viewWithTag:index+noVoteButtonTag1];
These viewWithTag calls are nil when I look at them. The only difference that I can see from my earlier implementation is that the old one had sections and one row, while this one is all rows and one section. So replacing the indexPath.section with indexPath.row should account for that. Also I checked that the tag made in cellForRowAtIndexPath is the same as the row recovered in the yes/no vote method, because it is displaced by one because of the profile cell being created at indexPath.row==0. I tried passing the cell to the yes/no vote method and tried to recover the buttons and labels with contentView as some suggestions made on similar posts. However this didn't seem to solve my problem. Really would appreciate some insight on this.
have you call the '[tableView reload]' method to update the UITableView, it may helps.
Firstly, the table reuse identifier should be used for types of cells, not one for each cell. You have two types, so you should use two fixed reuse identifiers.
ProfileFirstCell *cell = [self.tableView dequeueReusableCellWithIdentifier:#"ProfileCell"];
if (cell == nil) {
cell = [[ProfileFirstCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:#"ProfileCell"];
}
and
YesNoCell *cell =[self.tableView dequeueReusableCellWithIdentifier:#"YesNoCell"];
if (cell==nil) {
cell=[[YesNoCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"YesNoCell"];
}
Secondly, rather than trying to get a reference to a cell after creating the table, which isn't working for you, you should initialize the cells completely when they are created. (TableView won't create cells unless they're visible, so you shouldn't rely on their existing at all.)
createProfileCell should really be called initializeProfileCell, because you're not creating the cell in it - you already did that in the line above, or recovered an old one.
Then your call to initializeProfileCell can take a flag specifying whether it is a Yes or No cell and set its properties accordingly.
cell = [self initializeProfileCell:cell isYes:(indexPath.section==0)];
Similarly with createYesNoCell --> initializeYesNoCell.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"YOURCELL_IDENTIFIER";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
UILabel *title = (UILabel*) [cell viewWithTag:5];
UILabel *vensu =(UILabel*) [cell viewWithTag:7];
vensu.text = #"YOUR TEXT";
title.text = #"YOUR TEXT";
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell* cell = [tableView cellForRowAtIndexPath:indexPath];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.userInteractionEnabled = NO;
}
I use the above code to disable a cell after a user clicks on it once. The problem I've run into is that when a cell is added to the table, that new cell is disabled, and the previously disabled one isn't anymore.
How can I fix this problem?
Cells get reused as the user scrolls the table. You need to keep track of which rows the user has disabled so in your cellForRowAtIndexPath you can set the userInteractionEnabled property (to YES or NO as needed) for every cell every time it is requested.
Update - more details.
You need to keep track of which index paths the user has selected. Add an instance variable of type NSMutableSet and add each indexPath to this in your didSelectRow... method.
Then in your cellForRow... method you need to check if the current indexPath is in the set or not. Based on the result you set the cell's userInteractionEnabled property:
cell.userInteractionEnabled = ![theSelectedPathsSet containsObject:indexPath];
where theSeletedPathsSet is your NSMutableSet instance variable.
This solution assumes the rows and sections in your table are fixed. If the user can do things that results in rows being added, removed, or moved, then you can't simply track the index paths. You need to use some other key to know which rows have been selected.
Are you using dequeueReusableCellWithIdentifier in your cellForRowAtIndexPath?
You should have something like this:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *reuseIdentifier = #"myTableViewCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reuseIdentifier];
if (!cell) {
cell = [[ArticleTableViewCell alloc] init];
}
// customise cell here (like cell.title = #"Woopee";)
if (self.selectedCells containsObject:[NSString stringWithFormat:#"%d", indexPath.row]] {
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.userInteractionEnabled = NO;
}
return cell;
}
Expanding on the other answer, you can keep track of whether a specific cell has been previously selected (are therefore should be disabled) by doing something like this with the above:
Declare a property like #property (nonatomic, strong) NSMutableArray *selectedCells; then:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell* cell = [tableView cellForRowAtIndexPath:indexPath];
[self.selectedCells addObject:[NSString stringWithFormat:#"%d", indexPath.row]];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.userInteractionEnabled = NO;
}
My laptop is about to die, but if it crashed you should look at the code the initialises the cell (alloc and init) or keep what you had before there.
You need to keep a record of which cells have been disabled. You could store the indexPath of the selected cells in an array and then use that to determine which cells should be active and not active in your cell:forRowAtIndexPath: method.
Before I post the question itself, I need to state this is a jailbreak app. This is why I'm writing in "bizarre" folders in the filesystem.
Let's continue.
Here is my cellForRowAtIndexPath method:
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *MyIdentifier = #"pluginCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:MyIdentifier];
}
if(indexPath.row == 0)
{
cell.textLabel.text = #"default";
}else
{
//Get the plugin's display name.
NSBundle *currentPlugin = [[NSBundle alloc] initWithPath:[NSString stringWithFormat:#"/Library/Cydeswitch/plugins/%#", [plugins objectAtIndex:indexPath.row - 1], nil]];
cell.textLabel.text = [[currentPlugin localizedInfoDictionary] objectForKey:#"CFBundleDisplayName"];
if(cell.textLabel.text == nil)
{
//No localized bundle, so let's get the global display name...
cell.textLabel.text = [[currentPlugin infoDictionary] objectForKey:#"CFBundleDisplayName"];
}
[currentPlugin release];
}
if([[[cell textLabel] text] isEqualToString:[settings objectForKey:#"pluginToExecute"]])
{
cell.accessoryType = UITableViewCellAccessoryCheckmark;
currentCell = [cell retain];
}
return cell;
}
Like you can see, this method uses a member called currentCell to point to the cell that is currently "selected". This is an options table and the user should be able to have only one cell with the Checkmark accessory icon at any time.
When the use selects another cell, he is changing an option and the Checkmark is supposed to disappear from the current cell and appear in the newly appeared cell. I do that like this:
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
currentCell.accessoryType = UITableViewCellAccessoryNone;
[currentCell release];
currentCell = [[self tableView:tableView cellForRowAtIndexPath:indexPath] retain];
NSLog(#"CURRENT CELL %#", currentCell.textLabel.text);
currentCell.accessoryType = UITableViewCellAccessoryCheckmark;
}
But it doesn't work. The moment I tap another cell, the Checkmark correctly disappears from the old cell, but it never shows up in the new cell.
I know the selection work fine because that NSLog there prints the new cell's text just fine.
I have tried keeping track of the indexPath before, but it didn't work at all. When I tried using indexPaths instead of pointers to cells, when the user tapped the cell nothing happened at all (at least with my current approach the checkmark disappears from the old cell).
I think it has something to do with cellForRowAtIndexPath because if I keep pointing at the cells the checkmark disappears, but for some reason when trying to change the accessory type from a cell fetched with cellForRowAtIndexPath it doesn't seem to work at all.
Any help will be appreciated.
Typo? Try this:
currentCell = [[self.tableView cellForRowAtIndexPath:indexPath] retain];
You mustn't keep track of the last selected cell the way you are. Cell's get reused. Use an ivar to keep track of the indexPath or some other key appropriate to your data.
Then in the didSelect... method you get a reference to the old cell using the saved indexPath or key. In the cellForRow... method you need to set the proper accessoryType based on whether the current indexPath matches your saved indexPath.
Lastly, do not call your own delegate/data source method. When getting a reference to a cell, ask the table view for it directly.
BTW - you are over-retaining currentCell in your cellForRow... method. There is no need to retain it all in that method unless it is the first time you are making the assignment.
this is Nsr (just a beginner in xcoding), using xcode 4.3.3,
I've made a Custom UITableview with Custom UITableviewcell through storyboarding,
I have a UIBUtton and a UILabel in my custom cell.
i'v remove the cell selection (also cleared the background) so that only the buttons can be accessable which works as a backgound for the custom UILabel.
Now there are bunch of buttons since of using data array, and when i click any button, it segues to the other view (detail view), all i wanted is to set the custom Label (set over the detail view) from the previous selected button with "Label"...
means new Label = previous page's clicked Label from the custom tableview..
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
Custom *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[Custom alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.myLabel.text = [myArray objectAtIndex:indexPath.row];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
[self.myTable reloadData];
}
I hope you get my problem, very sorry for my poor english..
Please help me, im in a real mess, coz this problem already took my 3 days :(
Thanx in advance, Cheers.
function return Custom cell but in header you write UItableviewCell change this to Custom
I've created a navigation controller based application that uses core data. Without modifying much of the code from the starting application first, I'd like to be able to add rows by having the option to add rows via a dynamic row after I push edit.
Other examples I've found such as the one found at this site show the desired functionality however it does not use core data, so I haven't been able to translate this correctly using core data.
I've looked at the sample application iPhoneCoreDataRecipes and that application includes the desired functionality, however the sample is incredibly complex. Based on the sample app, i've added the following to my - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath function
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
// For the Ingredients section, if necessary create a new cell and configure it with an additional label for the amount. Give the cell a different identifier from that used for cells in other sections so that it can be dequeued separately.
id <NSFetchedResultsSectionInfo> sectionInfo = [[self.fetchedResultsController sections] objectAtIndex:0];
NSInteger rows = [sectionInfo numberOfObjects];
NSUInteger ingredientCount = rows;
NSInteger row = indexPath.row;
if (indexPath.row < ingredientCount) {
// If the row is within the range of the number of ingredients for the current recipe, then configure the cell to show the ingredient name and amount.
static NSString *IngredientsCellIdentifier = #"IngredientsCell";
cell = [tableView dequeueReusableCellWithIdentifier:IngredientsCellIdentifier];
if (cell == nil) {
// Create a cell to display an ingredient.
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:IngredientsCellIdentifier] autorelease];
cell.accessoryType = UITableViewCellAccessoryNone;
}
//
[self configureCell:cell atIndexPath:indexPath];
} else {
// If the row is outside the range, it's the row that was added to allow insertion (see tableView:numberOfRowsInSection:) so give it an appropriate label.
NSLog(#"---- IN ADD INGREDIENTS SECTION ----");
static NSString *AddIngredientCellIdentifier = #"AddIngredientCell";
cell = [tableView dequeueReusableCellWithIdentifier:AddIngredientCellIdentifier];
if (cell == nil) {
// Create a cell to display "Add Ingredient".
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:AddIngredientCellIdentifier] autorelease];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
cell.textLabel.text = #"Add Ingredient";
}
return cell;
}
When I click the edit button I can delete rows, however I'm not getting the added row to click to add rows. The sample app is much to complex to tell what i'm missing. Is there a function to add to automatically add the 'add row' button the end of the table?
EDIT: Added all of my .M file for reference # http://pastebin.com/Ld7kVts7
When I run my NSLog's 1-12 show in the console. I'm not currently trying to add the "add row" row to core data because that row is added or removed every time the user pushes the edit button in the navigation bar.
Have you changed your the numberOfRowsInSection method of your datasource to account for the extra row that you need?
What you need to do is add the new object to your database, then, assuming your tableView's dataSource is an array form your database, call reloadData on the tableView.