I am trying to make a ToDo list app and I can't for the life of me seem to figure out how to make the text box's typed text go into a box with a tick box for me to be able to change to completed.
Can anyone help me? I am just getting started in Xcode so please explain why/how it works that way I can learn for the future. Thanks guys!
App Rendering (What I am trying to make)
http://imgur.com/wcNXu0z
Currently in Xcode (What I have so far)
http://imgur.com/PLUVaVg
You need to create an IBAction for add button. So its get called when you click the button and store the entered text in UItextfield in an array and you will use that array to add rows in your table.
For example consider the code :
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [dataArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *MyIdentifier = #"MyIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:MyIdentifier] autorelease];
}
[cell.textLabel setText: [dataArray objectAtIndex:indexPath.row];
return cell;
}
-(IBAction)addCity:(id)sender
{
[tableView beginUpdates];
[dataArray addObject:#"City"];
NSArray *paths = [NSArray arrayWithObject:[NSIndexPath indexPathForRow:[dataArray count]-1 inSection:1]];
[[self tableView] insertRowsAtIndexPaths:paths withRowAnimation:UITableViewRowAnimationTop];
[tableView endUpdates];
}
I'd strongly recommend you check out the free Sensible TableView framework. The framework should help you automatically create your text fields and automatically fill/save their data.
Related
I want to add row dynamically. I have tableview list of building names. If some one choose building(didSelectRowAtIndexPath) then respective floors of building should get added dynamically as subrow. Its like maximizing and minimizing the subrow on respective building list selection. How do I do this. Thanks in advance...
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
// There is only one section.
if (tableView == indoortable || tableView == indoortable_iPad)
{
return 1;
}
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Return the number of time zone names.
if (tableView == indoortable || tableView == indoortable_iPad)
{
return [indoorZones count];
}
}
cellForRowAtIndexPath method:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
if (tableView == indoortable || tableView == indoortable_iPad)
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
cell.selectionStyle = UITableViewCellSelectionStyleGray; //cell bg
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
// Set up the cell.
//cell.textLabel.text = [copyListOfItems objectAtIndex:indexPath.row];
cell.textLabel.text =[indoorZones objectAtIndex: indexPath.row];
//[cell setIndentationLevel:[[self.indoorZones objectAtIndex:indexPath.row] intValue]];
return cell;
}
}
didSlectRowAtIndexPath method:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
zonesFloor = [[NSMutableArray alloc]init];
zonesFloorA = [[NSArray alloc] initWithObjects:#"Gr fl",#"1st fl",#"2nd fl",nil];
[zonesFloor addObject:zonesFloorA];
if (tableView == indoortable )
{
NSUInteger i=indexPath.row+1;
for (NSArray *count in self.indoorZones) //app is crashing here giving error.......Collection <__NSArrayM: 0x4b1d550> was mutated while being enumerated.
{
[zonesFloor addObject:[NSIndexPath indexPathForRow:i inSection:0]];
[self.indoorZones insertObject:zonesFloor atIndex:i++];
}
[[self indoortable] beginUpdates];
[[self indoortable] insertRowsAtIndexPaths:(NSArray *)zonesFloor withRowAnimation:UITableViewRowAnimationNone];
[[self indoortable] endUpdates];
}
if (tableView == indoortable_iPad )
{
//some logic
}
[tableView deselectRowAtIndexPath:selectedIndexPath animated:NO];
}
It Gives following error [__NSArrayI compare:]: Or [NSIndexPath _fastCStringContents:]: unrecognized selector sent to instance. I tried many ways but may be I am lacking somewhere. Please suggest. thanks in advance.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
//NSIndexPath *selectedIndexPath = [self.indoortable indexPathForSelectedRow];
zonesFloorA = [[NSArray alloc] initWithObjects:#"Gr fl",#"1st fl",#"2nd fl",nil];
if (tableView == indoortable )
{
for (NSString *str in zonesFloorA) {
[indoorZones addObject:str];
}
//[[self indoortable] beginUpdates];
//[[self indoortable] insertRowsAtIndexPaths:(NSArray *)zonesFloor withRowAnimation:UITableViewRowAnimationNone];
//[[self indoortable] endUpdates];
}
if (tableView == indoortable_iPad )
{
//some logic
}
[tableView reloadData];
}
may this meet your requirement
Okay, so not to sound mean, but there are almost too many issues here to count.
Let's start with a basic explanation of how tableView's work so that you can start to fix this:
First, the tableView asks how many sections are in the table by calling:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
}
In your code, you simply tell it that it has one section. However, in your later code, when you try to add rows to your table, you tell it that you want to add your rows to a second section (with an index of 1). Therefore, you either need to add these rows to section 0 instead, or update the above method to tell it that, sometimes, there are two sections.
Second, the tableView asks how many rows are in each section of the table by calling:
- (NSInteger)tableView:(UITableView *)tableView
numberOfRowsInSection:(NSInteger)section {
}
In your code, you are simply returning the number of zones. However, like above, you need to include the rows that you have added to your table. If you are adding them to a different section, then you need to return different values, depending on how many rows are in the section with the index asked for in the section variable. If they are all in the same section, then you need to add them up and return the correct value.
Third, the tableView asks for an actual cell for the row by calling:
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
}
In your code, you are only returning a cell which has data populated by the indoorZones array, but you also need to supply cells which are configured properly for the specific zone/floor. Again, you either need to determine this by section number or row number as appropriate.
Finally, when you click on a row, the tableview tells you by calling the following method:
- (void)tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
}
In this method, you need to update your data source that is used by the previous functions so that when they get called again, they will provide the correct data. Your data source must mirror the way that you want your table view to look. In your case, you have an array called indoorZones. This is good if you just want to display a list of zones, which is what you start off doing. However, when you want to add more rows, you need to add more rows to your data source first, so that when the tableView starts this process over, it is already there.
If you want everything to stay in one section, then I would come up with a data source that can include both types of rows, and be able to distinguish between them so that cellForRowAtIndexPath can create the proper type of cell and return it.
If you want two sections, then I would add a second array for the second section (since it is not the same type of data) and return the appropriate values in each of these methods, based on which array you need to use for that section.
I hope this helps!
I have a search bar added to the navigation bar. When the user types a word and clicks the search button (keyboard) I need to display results in the table related to the search.
When I click "Search", I get blank records (it actually goes inside the if condition in the searchBarSearchButtonClicked: method and adds the animal object too). I think there's a problem in
[mutableArray addObject:animal];
...
self.animalArray = mutableArray;
[self.tableView reloadData];
My complete code is as follows.
-(void)searchBarSearchButtonClicked:(UISearchBar *)searchBar{
[self.mutableArray removeAllObjects];
for (Animal *animal in self.animalArray) {
if ([[animal nameOfAnimal] isEqualToString:[searchBar text]] ) {
[mutableArray addObject:animal];
}
}
self.animalArray = mutableArray;
[self.tableView reloadData];
[searchBar resignFirstResponder];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
Cell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
Animal *animal = [self.animalArray objectAtIndex:indexPath.row];
cell = [[Cell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:CellIdentifier];
cell.nameofani.text=animal.nameOfAnimal;
cell.oriofani.text=animal.originOfAnimal;
}
return cell;
}
Make sure you implement tableView:numberOfRowsInSection: correctly, returning [self.animalArray count] for the search results table view.
try:
self.animalArray = [mutableArray copy];
I have been trying to figure out how to set the accessoryType to UITableViewCellAccessoryCheckmark when the cell is selected but am having trouble finding a decent example of this.
If you know how to do this or a good tutorial could you please let me know that would be great.
To restrict the user to just one selection, meaning to create an exclusive list of one choice only, you could follow these steps;
Firstly, have a global index path declared in your .h file to keep track of the already selected cell ->
NSIndexPath *oldIndexPath;
When you create the cells, be sure to set the accessory type to none, so that no cell is selected by default when the table is seen;
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"CellIdentifier"];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"CallIdentifier"];
cell.accessoryType = UITableViewCellAccessoryNone;
}
return cell;
}
Finally, in the didSelectRowAtIndexPath delegate method, add the following code which will remove the checkmark from the already selected cell, and add a checkmark to the newly selected one.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
if (oldIndexPath==nil) { // No selection made yet
oldIndexPath=indexPath;
[cell setAccessoryType:UITableViewCellAccessoryCheckmark];
}
else {
UITableViewCell *formerSelectedcell = [tableView cellForRowAtIndexPath:oldIndexPath]; // finding the already selected cell
[formerSelectedcell setAccessoryType:UITableViewCellAccessoryNone];
[cell setAccessoryType:UITableViewCellAccessoryCheckmark]; // 'select' the new cell
oldIndexPath=indexPath;
}
}
Hope this works out! :)
Something like this may work:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [self tableView:myTableView cellForRowAtIndexPath:indexPath];
[cell setAccessoryType:UITableViewCellAccessoryCheckmark];
}
To answer the comment below, just push a viewController in the same method like this:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [self tableView:myTableView cellForRowAtIndexPath:indexPath];
[cell setAccessoryType:UITableViewCellAccessoryCheckmark];
// Then push a new view
iPhoneCustomViewController *myVC = [[iPhoneCustomViewController alloc] initWithNibName:#"iPhoneCustomViewController" bundle:nil];
[self.navigationController pushViewController:myVC animated:YES];
[myVC release];
// And deselect the row (if desired)
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
Did you know that:
1.) UITableView keeps track of the index paths for the rows that have been selected? It's in an array called indexPathsForSelectedRows
2.) UITableView has a flag you can set to make it either single or multiple selection. You can change it by calling the setter setAllowsMultipleSelection:(BOOL).
So, assuming that the table has been set to single selection, we can do the following in the tableView:CellForRowAtIndexPath method ...
-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *simpleTableIdentifier = #"CellIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
[cell setSelectionStyle:UITableViewCellSelectionStyleNone];
[[cell textLabel] setText:#"Some Text"];
NSArray *selectedIndexPaths = [tableView indexPathsForSelectedRows];
if ([selectedIndexPaths containsObject:indexPath]) {
[cell setAccessoryType:UITableViewCellAccessoryCheckmark];
}else{
[cell setAccessoryType:UITableViewCellAccessoryNone];
}
return cell;}
This implementation of CellForRowAtIndexPath will give you a clean checkmark with no gray background when a cell is selected. You will need to set the checkmark in the didSelectRowAtIndexPath delegate method to make sure a cell gets the checkmark the moment it gets selected.
No need to create separate ivars or anything else to keep track of what was or wasn't selected. It's all neatly contained in the UITableView as Apple intended.
UITableViewCell *newCell = [tableView cellForRowAtIndexPath:indexPath];
newCell.accessoryType=UITableViewCellAccessoryCheckmark;
Implement this in didSelectRowAtIndexPath delegate method
From the docs:
The delegate handles selections in this method. One of the things it
can do is exclusively assign the check-mark image
(UITableViewCellAccessoryCheckmark) to one row in a section
(radio-list style). This method isn’t called when the editing property
of the table is set to YES (that is, the table view is in editing
mode). See "Managing Selections" in Table View Programming Guide for
iOS for further information (and code examples) related to this
method.
Here is an example:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath]
cell.UITableViewAccessoryType = UITableViewCellAccessoryCheckmark;
}
When i scroll UITableView it crashes the app. Here is code.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSDictionary *tempDict = [albums objectAtIndex:indexPath.row];
static NSString *CellIdentifier = #"ImageCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
} else {
AsyncImageView *oldImage = (AsyncImageView *)[cell.contentView viewWithTag:999];
[oldImage removeFromSuperview];
}
I set the breakpoints and it stops at line
NSDictionary *tempDict = [albums objectAtIndex:indexPath.row];
What am i doing wrong?
Thanks in advance.
I am not sure, first of all please check the total number of rows and your array count. They must be same. If still it crashes then put this line
NSDictionary *tempDict = [[albums objectAtIndex:indexPath.row] copy];
Check size of albums array. May be it is smaller then indexPath.row or it was released somewhere.
Make sure you are not reading out of bounds of your NSdictionary.
Check your return value in the tableView:numberOfRowsInSection: dataSource method.
The most likely reason for a crash on that line is that your table view has more rows than you have items in your albums array. Normally, in a setup like this, you'd have exactly the same number of rows in your table, and your implementation of –tableView:numberOfRowsInSection: would look like this
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// assuming that there is only one section
return [albums count];
}
I solved this problem. Actually in the $cellForRow ,I was trying to get information from server, I did not apply lazy loading there. Because of that while scrolling the tableView, app was crashing.
Thank you to all for your help.
I'm having quite a bit of pain inserting and deleting UITableViewCells from the same UITableView!
I don't normally post code, but I thought this was the best way of showing where I'm having the problem:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 5;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if (iSelectedSection == section) return 5;
return 1;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//NSLog(#"drawing row:%d section:%d", [indexPath row], [indexPath section]);
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
}
if (iSelectedSection == [indexPath section]) {
cell.textColor = [UIColor redColor];
} else {
cell.textColor = [UIColor blackColor];
}
cell.text = [NSString stringWithFormat:#"Section: %d Row: %d", [indexPath section], [indexPath row]];
// Set up the cell
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Navigation logic -- create and push a new view controller
if ([indexPath row] == 0) {
NSMutableArray *rowsToRemove = [NSMutableArray array];
NSMutableArray *rowsToAdd = [NSMutableArray array];
for(int i=0; i<5; i++) {
//NSLog(#"Adding row:%d section:%d ", i, [indexPath section]);
//NSLog(#"Removing row:%d section:%d ", i, iSelectedSection);
[rowsToAdd addObject:[NSIndexPath indexPathForRow:i inSection:[indexPath section]]];
[rowsToRemove addObject:[NSIndexPath indexPathForRow:i inSection:iSelectedSection]];
}
iSelectedSection = [indexPath section];
[tableView beginUpdates];
[tableView deleteRowsAtIndexPaths:rowsToRemove withRowAnimation:YES];
[tableView insertRowsAtIndexPaths:rowsToAdd withRowAnimation:YES];
[tableView endUpdates];
}
}
This code creates 5 sections, the 1st (indexed from 0) with 5 rows. When you select a section - it removes the rows from the section you had previously selected and adds rows to the section you just selected.
Pictorally, when I load up the app, I have something like this:
http://www.freeimagehosting.net/uploads/1b9f2d57e7.png http://www.freeimagehosting.net/uploads/1b9f2d57e7.png
Image here: http://www.freeimagehosting.net/uploads/1b9f2d57e7.png
After selecting a table row 0 of section 2, I then delete the rows of section 1 (which is selected by default) and add the rows of section 2. But I get this:
http://www.freeimagehosting.net/uploads/6d5d904e84.png http://www.freeimagehosting.net/uploads/6d5d904e84.png
Image here: http://www.freeimagehosting.net/uploads/6d5d904e84.png
...which isn't what I expect to happen! It seems like the first row of section 2 somehow remains - even though it definitly gets deleted.
If I just do a [tableView reloadData], everything appears as normal... but I obviously forefit the nice animations.
I'd really appreciate it if someone could shine some light here! It's driving me a little crazy!
Thanks again,
Nick.
Struggled to get this to work. Here's my code to add a row to my tableView:
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:0];
[tableView beginUpdates];
[dataSource insertObject:[artistField text] atIndex:0];
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationTop];
[tableView endUpdates];
I seem to remember that numberOfRowsInSection: will get called when you call deleteRows or insertRow, you need to be really careful that the reality numberOfRowsInSection cliams matches your changes. In this case you may want to try moving the iSelectedSection = [indexPath section]; line to after the endUpdates.
I don't remember where I read this but I believe you shouldn't perform table row updates (insertions and deletions) from inside one of the table view delegate functions. I think a better alternative would be to do a performSelectorOnMainThread passing along the necessary information needed to perform the updates as an object. Something like:
- (void)tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// ....
[self performSelectorOnMainThread: #selector(insertRows:)
withObject: someObjectOrNil]; // double check args
}
- (void) insertRows: (NSObject*)someObjectOrNil {
[tableView beginUpdates];
// update logic
[tableView endUpdates];
// don't call reloadData here, but ensure that data returned from the
// table view delegate functions are in sync
}
In the code you posted, your loop index runs from 0 to 4, which suggests that it would delete all of the rows in section 1, and then add five new rows to section 2. Since each section already has a row 0, this would add a second instance of section 2, row 0 to the table.
I would suggest having your loop run from 1 to 4:
for (int i=1; i<5; i++)
{
// ...
}
FYI: This bug seems to have been fixed completely with the 2.2 iPhone update.
Thanks Apple!
Nick.