i have a normal table view, and i want to reload the data and make de table separated with groups changing the tableview style to group,i was trying to use the method to give a title for each header its goes ok,but only if i init with it,not for change in runtime, is that possible,or i have to load another view?
-(NSString *) tableView: (UITableView *) tableView titleForHeaderInSection: (NSInteger) section {
if(group){
switch (section) { case 0: return #"A"; break; case 1: return #"B"; break; case 2: return #"C"; break; case 3: return #"D"; break; case 4: return #"E"; break; } }return nil;
}
i try to put a boolean to verify the time to reload data but didnt work....
Well I think tableView:titleForHeaderInSection: only gets called when loading the UITableView or when reloading it. So if you want to change it a runtime, you could have an NSArray that holds the titles for all the headers and have the tableView:titleForHeaderInSection: use that array.
return [YourArray objectAtIndex:section];
And you can modify this array wherever you want in your code. You would have to call [YourTableView reload] anyways to fire up the delegate and get the headers titles updated in your view.
I don't know if you still need the information bellow so I'll leave it here.
To reload a UITableView all you have to do is call [YourTableView reload];.
As for groups, that's a UITableView style. You can modify this either through IB in the Attributes Inspector in Table View > Style > Grouped. Or programmatically using UITableViewStyleGrouped in the TableView's init.
For example:
YourTableViewController *foo = [[YourTableViewController alloc] initWithStyle:UITableViewStyleGrouped];
Related
Can someone tell me how to assign a interface to a table view element, using storyboards? I'm making a medical calculator that has different calculators for every equation, and I need help making code that points a element to push to another interface. This is because for every equation, there are different fields to fill out (such as age, oxygen levels, whether someone has diabetes or not, height, etc.) Not every equation needs the same fields.
I have tried doing this:
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Deselect row
[tableView deselectRowAtIndexPath:indexPath animated:YES];
// Declare the view controller
UIViewController *anotherVC = nil;
// Determine the row/section on the tapped cell
switch (indexPath.section) {
case 0:
switch (indexPath.row) {
case 0: {
// initialize and allocate a specific view controller for section 0 row 0
anotherVC = [[BmiViewController alloc] init];
break;
}
case 1: {
// initialize and allocate a specific view controller for section 0 row 1
/anotherVC = [[AaOxygenGradientViewController alloc] init];
break;
}
}
break;
}
}
But after doing this, it refers back to what was originally in the storyboard document (which is empty because I have created the interface programmicatally), instead of showing my test alert popup.
Also, is it possible to maybe make a bunch of table view cells, then have every one segue to every other view controller in the storyboard?
Thanks a lot in advance!
First, you are running deselectCellAtIndexPath? What is the reason for this? If you are just trying to remove the blue highlight then it's better to change the UITableViewCellSelectionStyle (or something like this) of the cell.
I'm not sure what you're asking for the first part but for the segue part then yes.
In Storyboard set up the segues from the tableViewController to each other VC that you want to segue to and give them all sensible identifiers.
i.e. medicalCalulatorSegue
graphSegue
userDetailsSegue
etc...
Then in your didSelect method you will have something like...
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
//some stuff...
switch(indexPath.row) {
case 0:
[self performSegueWithIdentifier:#"medicalCalulatorSegue"];
break;
case 1:
[self performSegueWithIdentifier:#"graphSegue"];
break;
case 2:
[self performSegueWithIdentifier:#"userDetailsSegue"];
break;
}
}
This will then segue to each of the different view controllers depending on which cell is selected.
The reason for not deselcting the cell is that in your method prepareForSegue you can then still access the indexPath of the selected cell...
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
I have an NSDictionary that holds all the data:
One title (not important for this question)
One link (not important for this question)
One array of NSDictionary containing again 1 title and 1 link
I'm displaying this data in a view based table view like this:
- (NSInteger)numberOfRowsInTableView:(NSTableView *)tv
{
if (tv == _downloadTable)
//I use this "if" because I have another tableView that has nothing to do
//with this one
{
return [[myDictionary objectForKey:#"myArray"] count];
}
}
I want 2 columns in this tableView, one to display the title and one with a checkbox, that would do something letting me know which row is checked.
- (NSView *)tableView:(NSTableView *)tv viewForTableColumn :(NSTableColumn *)tableColumn row :(NSInteger)row
{
if (tv == _downloadTable)
{
if (tableColumn == _downloadTableTitleColumn)
{
if ([[[myDictionary objectForKey:#"myArray"]objectAtIndex:row]objectForKey:#"title"])
{
NSString *title = [[[myDictionary objectForKey:#"myArray"]objectAtIndex:row]objectForKey:#"title"];
NSTableCellView *result = [tv makeViewWithIdentifier:tableColumn.identifier owner:self];
result.textField.stringValue = title;
return result;
}
}
if (tableColumn == _downloadTableCheckColumn)
{
NSLog(#"CheckBox"); //I wanted to see exactly when that was called
//But it didn't help me :(
NSButton *button = [[NSButton alloc]init];
[button setButtonType:NSSwitchButton];
[button setTitle:#""];
return button;
}
}
}
Right now when I run it and click on the checkbox it does nothing
(of course because I don't know how to make it do something.
Where should I put the code that should do something?
The main goal is an editable list of downloads, right now the list is displayed, with the checkbox right next to the title at each lines.
I would like to know which checkBox are checked and which are not.
I tried this:
[button setAction:#selector(checkBoxAction:)];
- (void)checkBoxAction: (id)sender
{
NSLog(#"I am button : %# and my state is %ld", sender, (long)[sender state]);
}
But I can't figure out how to get the row of that button, to know which title is associated with this checkBox.
I also tried the setObjectValue method of the tableView without success.
The way I would like it to work is:
I have a "start downloading" button that check if each checkbox is checked or not and launch the next action (downloading) only with the checked row.
I would like to avoid bindings because I plan to make it work on iOS too and I don't want to have different code for iOS.
You can use the NSTableView method -rowForView: to get the row a particular view is in.
In your case you'd have something like this:
- (void)checkBoxAction:(id)sender
{
NSInteger row = [_downloadTable rowForView:sender];
NSLog(#"The button at row %ld was clicked.", row);
}
Here are the docs for NSTableView: https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/ApplicationKit/Classes/NSTableView_Class/Reference/Reference.html
You could try using the button' tag property setting it for each button you place as the number (location) in the tableview. Look here!!!
Detecting which UIButton was pressed in a UITableView
[EDIT1]
If people actually decided to read the linked post you would realize that the answer is actually there.
Try adding:
[button setTag:row];
[button addTarget:self action:#selector(checkBoxAction:) forControlEvents:UIControlEventTouchUpInside];
inside the else of your viewForTableColumn routine:
In your checkBoxAction routine:
- (void)checkBoxAction: (id)sender{
NSLog(#"I am button : %# and my state is %#", sender.tag, [sender state]);
}
I also think that once you begin digging further into your code, you are going to want to start using the auto-dequeuing capability of the TableViewCell objects. I believe that you are going to find yourself in a memory alloc/dealloc problem.
i m parsing json data and populating the tableview and making some validation with the incoming json data..everthing works fine.i made the code such that when the last table view row is clicked it got to open a modal view controller.when clicked .i m getting this error [tableiew1] Unrecognised selector send at the instance...could u guys help me out below is the code.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Navigation logic may go here. Create and push another view controller.
if (indexPath.row == 5) {
if (self.dvController6 == nil)
{
Vad_tycker *temp = [[Vad_tycker alloc] initWithNibName:#"Vad_tycker" bundle:[NSBundle mainBundle]];
self.dvController6 = temp;
[temp release];
}
[self presentModalViewController:self.dvController6 animated:YES];
}
}
Seems like you have forgotten to provide the access for the tableView1 in Vad_tycker.
Or You should do a crosscheck whether you have assigned the correct instance in tableView delegate's and also make sure to provide the implementation for the method of delegate's in their respect target classes.
I think you forgot to connect the tableView Datasource and Delegate methods in the vad_tycker controller.
Also check that the instance of UITableView i.e. in your case tableView1 is also connected with the TableView. on the view.
Thanks
Using a segment control I'm trying to reload 2 UIPickerViews with a new array of data.
My problem is the new array doesn't show until I scroll up or down on the picker (old data will go away once out of view). I've tried using the reloadAllComponents method to no luck. Here is what the code looks like:
//Segment Control
-(IBAction)unitType:(id)sender {
if([sender selectedSegmentIndex]==0){
NSLog(#"unitType change 1");
NSLog(#"before values = %#",units);
[units removeAllObjects];
[units addObject:#"in"];
//etc.
[self.inputUnits reloadAllComponents];
NSLog(#"current values = %#",units);
}else {
NSLog(#"unitType change 2");
NSLog(#"before values = %#",units);
[units removeAllObjects];
[units addObject:#"in^3"];
//etc.
[self.inputUnits reloadAllComponents];
NSLog(#"current values = %#",units);
}
}
IB has 2 UIPickerViews wired up to the file's owner for both delegate and datasource.
You haven't hooked up the UIPickerView to your inputUnits property. Thus, your call to -reloadAllComponents is getting sent to nil, and things are only getting updated when the pickerView wants to show something new (which it does when you scroll).
How would I use a tableView as a value selector?
So I have a series of input fields and what I want is when you select a cetian field it opens a tableview of options that you can pick from as a value for that field.
Upon selecting an option it returns to the previous View with the selected value filling that field.
This is what I do, similar to the Settings > General > International > Language table view in the iPhone/iPod.
The user can tap a row and a check mark will appear. The view is dismissed when "Done" or "Cancel" is tapped.
First, create a UITableViewController that will display your options. Have a toolbar on the top with a Cancel and Done button. Also have these properties:
SEL selector; // will hold the selector to be invoked when the user taps the Done button
id target; // target for the selector
NSUInteger selectedRow; // hold the last selected row
This view will be presented with the presentModalViewController:animated: method so it appears from the bottom of the screen. You could present it in any other way, but it seems kind of standard across iPhone applications.
Before presenting the view, set target and selector so a method will be called when the user taps the "Done" button.
Now, in your newly created UITableViewController you can implement the thetableView:didSelectRowAtIndexPath:` method as:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell * cell = [self.tableView cellForRowAtIndexPath:indexPath];
cell.accessoryType = UITableViewCellAccessoryCheckmark; // show checkmark
[cell setSelected:NO animated:YES]; // deselect row so it doesn't remain selected
cell = [self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:selectedRow inSection:0]];
cell.accessoryType = UITableViewCellAccessoryNone; // remove check from previously selected row
selectedRow = indexPath.row; // remember the newly selected row
}
Also implement cancel and done methods for the toolbar buttons:
- (IBAction)done:(UIBarButtonItem *)item
{
[target performSelector:selector withObject:[stringArray objectAtIndex:selectedRow]];
[self dismissModalViewControllerAnimated:YES];
}
- (IBAction)cancel:(UIBarButtonItem *)item
{
[self dismissModalViewControllerAnimated:YES];
}
You should use UITableViewDelegate's tableView:didSelectRowAtIndexPath:, remember the value somewhere in another object (a share instance/singleton maybe? - depending on your architecture) and then dismiss this table view.
I implemented a ViewController for Date pick.
I create a protocol to return the date picked to the previous view.
#protocol DataViewDelegate
#optional
- (void)dataViewControllerDidFinish:(NSDate*)dateSelected;
#end
...
- (void) viewDidDisappear:(BOOL)animated
{
if ([ (id)(self.delegate) respondsToSelector:#selector(dataViewControllerDidFinish:)])
{
[self.delegate dataViewControllerDidFinish:self.data];
}
[super viewDidDisappear:animated];
}
In the picker view you can use the
tableView:didSelectRowAtIndexPath:
to select the row you want. Here i set the data property.
The previous view is the delegate for the protocol.