Change UITextfield on a detailview by clicking on different Cells - objective-c

This is what I have so far:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
switch (indexPath.row)
{
// row 0 -> DetailViewController1 anzeigen...
case 0:
{
TableViewController *fvController = [[TableViewController alloc] initWithNibName:#"TableViewController" bundle:[NSBundle mainBundle]];
fvController.selectedCellItem = selectedCellItem;
[self.navigationController pushViewController:fvController animated:YES];
[fvController release];
fvController = nil;
}
break;
default:
break;
}
So my question is: How can I change a UITextfield of the detailView by selecting a cell. Thank you for your help so far;)

Do you want to edit the text in a UITextField in a cell? If so, there are a few ways you can do this, I'll touch on two of them.
First, why don't u just edit the cell right from within the tableView? This entails you to keep track of each cell's contents but if you always have a custom cell with a UITextField in it, you're half way there.
If you want to make changes to the text in a regular cell, then the user selects it and you give them an edit screen, this is a lot simpler. You can have your tableView push a view controller with a textField that has the text from your cell. They can edit this textField, and then press save. When they save, pop the view off the stack, save the changes to the data model, and update the tableView.
I'm not sure exactly what you're trying to do, but having a textField in a cell and then making edits in a detail screen seems redundant.
If you provide us with a little more info, I'm sure we can help.
UPDATE based on your clarification
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
switch (indexPath.row)
{
// row 0 -> DetailViewController1 anzeigen...
case 0:
{
ViewControllerName *vController = [[UIViewController alloc] initWithNibName:#"ViewControllerName" bundle:[NSBundle mainBundle]];
vController.textField.text = //set the text here from the data source. Assuming textField is an property of vController.
[self.navigationController pushViewController:vController animated:YES];
[vController release];
}
break;
default:
break;
}

Related

Assigning a separate user interface for every table view item

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];

Cell selection issue with EasyTableView

I have what must be a simple problem with EasyTableView (https://github.com/alekseyn/EasyTableView)
I have a number of horizontally scrolling tables that function properly.
I am able to select a cell and perform a segue, however, once the new view controller is dismissed, I am no longer able to select that cell and perform the same action until I have selected another cell in the same table.
My question is: How can I deselect previously selected the cell programmatically to renable this particular action.
Thanks in advance!
The selectedIndexPath is intentionally persistent in case a user scrolls the selected tableview cell offscreen and then back again. If you don't want this persistence please add the line shown below, after the delegate method (in EasyTableView.m):
- (void)setSelectedIndexPath:(NSIndexPath *)indexPath {
if (![_selectedIndexPath isEqual:indexPath]) {
NSIndexPath *oldIndexPath = [_selectedIndexPath copy];
_selectedIndexPath = indexPath;
UITableViewCell *deselectedCell = (UITableViewCell *)[self.tableView cellForRowAtIndexPath:oldIndexPath];
UITableViewCell *selectedCell = (UITableViewCell *)[self.tableView cellForRowAtIndexPath:_selectedIndexPath];
if ([delegate respondsToSelector:#selector(easyTableView:selectedView:atIndexPath:deselectedView:)]) {
UIView *selectedView = [selectedCell viewWithTag:CELL_CONTENT_TAG];
UIView *deselectedView = [deselectedCell viewWithTag:CELL_CONTENT_TAG];
[delegate easyTableView:self
selectedView:selectedView
atIndexPath:_selectedIndexPath
deselectedView:deselectedView];
// Add this line here!
_selectedIndexPath = nil;
}
}
}

Trigger setEditing: animated: without using an edit button

I have a UITableView with some custom cells in it. In these custom cells I defined a UILongPressGestureRecognizer that triggers the edit mode of this table. So when someone presses and holds a cell for like 1.5 sec, the table goes into edit mode.
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:#selector(startEditMode:)];
Which triggers:
- (void)startEditMode:(UISwipeGestureRecognizer *)recognizer {
if (self.allowEdit) {
UITableView *table = (UITableView *)self.superview;
[table setEditing:YES animated:YES];
}
}
But what I want to do is detect when the table goes into edit mode because I need to show/hide some additional buttons in this case. But for some reason in my viewcontroller this is never executed:
- (void)setEditing:(BOOL)editing animated:(BOOL)animated {
NSLog(#"SET EDITING");
[super setEditing:editing animated:animated];
}
Any suggestion why? Is this just being called when using a proper Edit Button as provided by default in the UINavigationController?
Or how can I detect when my UITableView goes into Edit Mode?
You're sending the message (setEditing) to the table view, you should be sending it to the view controller (presumably a UITableViewController subclass?). It will then take care of the table view for you.
Ok so in case someone else walks into this thread with the same problem, I will show you how I solved this.
In my custom UITableViewCell I have this method now:
- (void)startEditMode:(UISwipeGestureRecognizer *)recognizer {
if (self.allowEdit) {
UITableView *table = (UITableView *)self.superview;
UITableViewController *control = (UITableViewController *)table.dataSource;
[control setEditing:YES animated:YES];
}
}

UITableViewCell unselectable while its accessoryView is selectable

I want to have a UITableViewCell that is not selectable while its accessory view (a UISwitch in my case) is editable.
The issue is that I have two other cells of which one needs to remain active; this is very similar to the following image of the Time/Date selector from the iOS calendar app:
http://www.theiphoneblog.com/images/stories/2009/01/photo.jpg
I cannot post the image due to being a new user.
Note that in this view the "All-day" cell cannot be selected but its UISwitch can be changed, while one of "Starts" and "Ends" cells must remain selected.
I've tried both:
[cell setUserInteractionEnabled:NO];
[cell.contentView setUserInteractionEnabled:NO];
The first one works but does not allow the switch to be changed whereas the second does not work, it allows one of the top cells to be deselected which I do not want to happen.
Implement in delegate method
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if ([selectablePaths contains:indexPath])
{
// cell selected
selectedPath = indexPath;
}else
{
[tableView deselectRowAtIndexPath:indexPath animated:NO];
[tableView selectRowAtIndexPath:selectedPath animated:YES scrollPosition:UITableViewScrollPositionNone];
}
}
And enable user interaction for all cells.

How to use a UITableView to return a value

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.