I have a popover segue that goes to a view controller. I want to set some properties in the view controller when a cell is clicked. I tried using -prepareForSegue:, but then I realized that it doesn't have the scope of the selected cell. I know that I have to use:
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
delegate method, but I'm not sure how that will affect the popover segue. Do I have to programatically create the popover, or is there another way?
Thanks much!
~Carpetfizz
Use self.tableView.indexPathForSelectedRow to get the data from your table's data source, e.g., the array backing the table data. If, for some reason, you don't want to get the data from your data source, then the sender is the UITableViewCell that was tapped to trigger the segue.
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:#"YourSegueID"]) {
YourDestinationViewControllerClass* destinationController = segue.destinationViewController;
destinationController.somePublicProperty = self.yourTablesDataSourceArray[self.tableView.indexPathForSelectedRow.row];
UITableViewCell *cell = (UITableViewCell *)sender;
destinationController.someOtherPublicProperty = cell.textLabel.text;
}
}
So add an NSIndexPath propriety to your VC. Let's call it selectedCell. In your tableView:didSelectRowAtIndexPath method, save the selected index path to the instance variable.
Then in your prepareForSegue method, use the instance variable.
Alternately, in your prepareForSegue method, you could ask the table view for the currently selected row using the table view's indexPathForSelectedRow method.
The best approach is to use the indexPathForSelectedRow property.
For example you can write a code like this:
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:#"YourSegueIdentifier"])
{
NSIndexPath *indexPath = [sender indexPathForSelectedRow];
NextViewController *vc = (NextViewController *)segue.destinationViewController;
vc.yourProperty = #"Some Value";
}
}
Assuming NextViewController as your segue destination controller and yourProperty as the property you want to set during the segue, you can access and set information from your parent controller because indexPathForSelectedRow automatically knows which cell has been clicked.
More information can be found here.
Related
I have a Uitableview cell that has been successfully populated with dictionary array. Right now, i have difficulty passing the selected cell value to another view controller and display that value.
Here is my codes:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
NSLog(#"Tapped: %#",[[feeds objectAtIndex:indexPath.row]objectForKey:#"IncidentNumber"]);
someProperty = [[feeds objectAtIndex:indexPath.row]objectForKey:#"IncidentNumber"];
[self performSegueWithIdentifier:#"item" sender:self];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
if ([[segue identifier] isEqualToString:#"yourSegue"])
{
DescriptionViewController *vc;
vc = segue.destinationViewController;
vc.item_pass = someProperty;
}
}
you perform a segue with the identifier item but later in prepareForSegue you check for a segue with the identifier yourSegue...
Instead of implementing didSelectRowAtIndexPath connect the segue to the table view cell (rather than to the view controller).
Then the selected cell is passed as sender parameter in prepareForSegue and you can get the index path with
let selectedIndexPath = tableView.indexPathForCell(sender as! UITableViewCell)!
I have a controller with a listview that contain a custom cell.
I have created a modal segue from the cell to the next controller and I gave a name to this segue but when I click on the cell, prepareForSegue isn't called.
I could use the didSelectRowAtIndexPath and performSegueWithIdentifier but I have to send data to the next controller from the cell I've clicked on.
Any idea why the prepareForSegue isn't called? Or how to send data to the controller with another method?
You can get the cell data in didSelectRowAtIndexPath by getting the cell from the index of customCell that you clicked, and after you can performSegueWithIdentifier.
So let's make this easier:
Under your didSelectRowAtIndexPath method, add this line to get the properties of your customCell
YourCustomCell *customCell = (YourCustomCell *)[self.tableView cellForRowAtIndexPath:indexPath];
So now if you have something stored under your customCell you can access it from customCell instance.
After you managed to store or manipulate your data from customCell you do the performSegueWithIndenfier:
[self performSegueWithIdentifier:#"yourSegueID" sender:self];
Hope this helps
When you connect a segue from a cell to another view controller, unless it's a static table view, you'll have to trigger performSegueWithIdentifier from the didSelectRowAtIndexPath
After you execute performSegueWithIdentifier, prepareForSegue would be called.
In prepareForSegue, you can set up your destination view controller, which you can access via segue.destinationViewController
Like so:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
[super prepareForSegue:sender sender:sender];
if ([segue.identifier isEqualToString:#"YOUR_SEGUE_NAME_HERE"]) {
UIViewController *destinationViewController = segue.destinationViewController;
}
}
Or if you need to set things up in the didSelectRowAtIndexPath , you could do (iOS7+ only)
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[self performSegueWithIdentifier:#"YOUR_SEGUE_NAME_HERE" sender:self];
UIViewController *destinationViewController = [self.transitionCoordinator viewControllerForKey:UITransitionContextToViewControllerKey];
}
Update:
Turns out #rdelmar is correct, it does work with dynamic cells.
All you have to do then is
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
[super prepareForSegue:sender sender:sender];
if ([segue.identifier isEqualToString:#"YOUR_SEGUE_NAME_HERE"]) {
NSIndexPath *selectedIndexPath = [self.tableView indexPathForCell:sender];
}
}
And you have the index path of the cell that was tapped. Then you can use that to query your datasource and find the object that was used to populate that cell.
I have two view controllers
View Controller A
View Controller B
I have a Table View in View Controller A that lists out four sounds. When a user selects one of the sounds, a button in View Controller B should be programmed to play that sound.
I have been playing around with prepareForSeque and didSelectRowAtIndexPath and can't seem to get either one to work correctly.
What is the best way to do this?
You have to keep track of the selected indexPath in didSelectRowAtIndexPath:. A simple way is to create a property:
#property (strong, nonatomic) NSIndexPath *selectedIndexPath;
And then store the selected indexPath in that property, after that, call to the performSegueWithIdentifier:sender: method:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
self.selectedIndexPath = indexPath;
[self performSegueWithIdentifier:#"SEGUE_ID" sender:nil];
}
In prepareForSegue: get the selected sound form the sounds array:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:#"SEGUE_ID"])
{
ViewControllerB *controller = segue.destinationViewController.
controller.selectedSound = self.sounds[self.selectedIndexPath.row];
}
}
That is in case that the name of the array is sounds. You have to create a property in the view controller B to store the sound passed through the segue. Name a segue between the scenes with the name SEGUE_ID. It is obvious that you have to adapt the code to your needs, I'm assuming your array is full of NSString objects referencing the names of your sounds. So, the property selectedSound in the last chunk of code have to be an NSString. As I said, it depends of the structure of your array of sounds.
Edit: According to the #jlehr comment, the code can be more concise by removing the property in the View Controller A, the line self.selectedIndexPath = indexPath and obtaining the selected indexPath with the following instead:
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
ViewControllerB *controller = segue.destinationViewController.
controller.selectedSound = self.sounds[indexPath.row];
I am trying to push data from a UITableViewCell into another view controller. I have tried two separate ways, instantiateViewControllerWithIdentifier and also PrepareForSegue. In both instances the ViewController loads correctly but the data is not being passed across (either null, or the first array value).
Here is my instantiateViewControllerWithIdentifier method, when I log the variable within my ViewController it just returns null.
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *testNumber = [jobNumberArray objectAtIndex:indexPath.row];
NSLog(#"Job is... %#",testNumber);
StandardInfoViewController *controller = [self.storyboard instantiateViewControllerWithIdentifier:#"StandardInfoViewController"];
controller.JobNr = [jobNumberArray objectAtIndex:indexPath.row];
[self.navigationController pushViewController:controller animated:YES];
}
Prepare For Segue
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[self performSegueWithIdentifier:#"Details" sender: self];
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if([segue.identifier isEqualToString:#"Details"]){
StandardInfoViewController *controller = (StandardInfoViewController *)segue.destinationViewController;
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
controller.jobNumber = [jobNumberArray objectAtIndex:indexPath.row];
}
}
When I use the prepareForSegue call I get the first row of my Array, which I understand because it doesn't know the cell, but I don't know how to identify the Cell within the prepareForSegue call.
I hope this makes sense, and any help or pointers would be greatly appreciated.
Thanks
If you drag the segue FROM the tableView-cell in the storyboard, you will then get the cell itself as parameter sender.
then you can use tableView indexPathForCell:sender to get the actual index of the selected cell. Then just fetch your object normally.
I.e. you will not need to implement didSelectRowAtIndexPath
If you still want to use didSelectRowAtIndexPath, just pass the cell as the sender parameter manually. I.e:
[self performSegueWithIdentifier:#"Details"
sender:[self.tableView cellForRowAtIndexPath:indexPath]]
Although your first version with instansiateViewController should work, judging by your code.
Another pattern is to subclass the cells themselves, and let them have a property that is the object that they want to display. Then you can just fetch the object directly from the cell without calling the data-array itself.
Is this what you want?
This is how you identify Cell in prepareForSegue method.
**UITableViewCell *cell=[myTable cellForRowAtIndexPath:path];**
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if([segue.identifier isEqualToString:#"Details"]){
StandardInfoViewController *controller = (StandardInfoViewController *)segue.destinationViewController;
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
**UITableViewCell *cell=[self.tableView cellForRowAtIndexPath:indexPath];**
controller.jobNumber = [jobNumberArray objectAtIndex:indexPath.row];
}
}
I want to create table, and when click cell in table , the content will display in another view. Each of table has different design. How do I do that.
I don't enough to post image, you can see in this link. thanks.
Use this delegate method:
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[self performSegueWithIdentifier:#"InstructionToSection" sender:nil]; //"InstructionToSection" is seque name
}
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
InstructionSectionViewController * instructSection = [segue destinationViewController]; // InstructionSectionViewController is ur next viewcontroller. 1st u need to import your destination viewcontroller in header
instructSection.SelectedItem = #"Ur Passing value"; // selectedItem should be declare in InstructionSectionViewController as property, need to synthesize
}
For more detail refer to this link