I have Table View controller, then it has subclass DetailViewController, which content changes depending on cell chosen, but when move on, and from my DetailViewController go to MapView, I try to use same method I used to get text on DetailViewController, but it dont works, no matter what I do. Im stuck with it more like 3 week now:(
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (!self.detailViewController) {
self.detailViewController = [[DetailViewController alloc] initWithNibName:#"DetailViewController" bundle:nil];
[self.navigationController pushViewController:self.detailViewController animated:YES];
[self.detailViewController changeProductText:[teksti objectAtIndex:indexPath.row]];
[self.detailViewController changeProductText1:[adrese objectAtIndex:indexPath.row]];
[self.detailViewController changeProductText2:[laimigastunda objectAtIndex:indexPath.row]];
[self.detailViewController changeImage:[imageChange objectAtIndex:indexPath.row]];
}
}
No matter what I change here, it dont work.
It looks from the code you are showing that you are not giving a data object to your detailViewController, but rather set directly the values.
This is not the way to do it and probably the reason why you are having issues. You need to grasp the concept of MVC and go back to it.
At least you should
1. build a dictionary in first view with keys #"teksti", #"adrese", #"longitude", #latitude".
2. Create a property in DetailViewController to hold the dictionary.
3. update the values displayed when displaying the DetailViewController
So that when you press the map button, you can then push a view containing a mapView and set the map to the latitude and longitude that you have.
So it would do:
NSDictionary *dict = [[NSDictionary alloc] initWithObjectsAndKeys:[teksti objectAtIndex:indexPath.row], #"teksti", [adrese objectAtIndex:indexPath.row], #"adrese", [latitude objectAtIndex:indexPath.row], #"latitude", [longitudes objectAtIndex:indexPath.row], #"longitude", nil];
[detailViewController setDict:dict];
and in the DetailViewController.m:
- (void)viewWillAppear:(BOOL)animated{
[self changeProductText:[dict objectForKey:#"teksti"]];
.... And so on
}
Your code will be useful to provide you with more details directions.
Related
I've recently completed the apple tutorial on table views called Bird Watching and this worked fine. However, i'm now trying to take it further by adding an edit button and seem to be having a problem.
Below is the code that the MasterViewController uses to create my table. This works fine.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath (NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"BirdSightingCell";
static NSDateFormatter *formatter = nil;
if(formatter == nil){
formatter = [[NSDateFormatter alloc] init];
[formatter setDateStyle:NSDateFormatterMediumStyle];
}
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
BirdSighting *sightingAtIndex = [self.dataController objectInListAtIndex:indexPath.row];
[[cell textLabel]setText:sightingAtIndex.name];
[[cell detailTextLabel]setText:[formatter stringFromDate:(NSDate *)sightingAtIndex.date]];
return cell;
}
I've tried using some of this code in order to get the edit button working and below is what I created. This doesn't work and I have no idea how to fix it.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
BirdSighting *sightingAtIndex = [self.dataController removeObjectAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationFade];
} else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
}
}
One of the error messages I've had states "No visible #interface for BirdSightingDataController declares the selector removeObjectAtIndex.
I looked up the Bird Watching tutorial on the Apple website, to know exactly what you're talking about and which classes the objects are an instance of.
In your tableView:commitEditingStyle:forRowAtIndexPath: method, you try to remove a certain object. When removing an object, you have to make sure it's deleted from both your view (in this case your table view) and your model object (in this case your data controller). Your removed the row from your table view like this:
[tableView deleteRowsAtIndexPaths:#[indexPath]withRowAnimation:UITableViewRowAnimationFade];
This part looks good. However, you try to remove the object from your data controller using the following line of code:
BirdSighting *sightingAtIndex = [self.dataController removeObjectAtIndex:indexPath.row];
You sent the removeObjectAtIndex: method to self.dataController. The removeObjectAtIndex: method can only be sent to an instance of NSMutableArray. Your data controller is an instance of BirdSightingDataController, which is not an NSMutableArray. Thus, after trying to send the removeObjectAtIndex: method to self.dataController, you got an error.
To access the object at a certain index of your data controller array, you declared and implemented the objectInListAtIndex: method like this:
- (BirdSighting *)objectInListAtIndex:(NSUInteger)theIndex {
return [self.masterBirdSightingList objectAtIndex:theIndex];
}
Now you want to remove the object at a certain index of your data controller array, you could declare a method like removeObjectInListAtIndex: in your BirdSightingDataController header file as well. You can then implement it like this:
- (void)removeObjectInListAtIndex:(NSUInteger)theIndex {
[self.masterBirdSightingList removeObjectAtIndex:theIndex];
}
Note that this method doesn't return anything, as it just removes an object from the array. Make sure you use - (void) instead of - (BirdSighting *) in both your header and implementation file.
Now, instead of sending the removeObjectAtIndex: method to your data controller, you can simple remove the object (which the user deletes) from your data controller like this:
[self.dataController removeObjectInListAtIndex:indexPath.row];
Hy all.
Since i am using IOS 5 , therefore i am using storyboard.
In the older versions, i could easily write initWithNibName:#"Details", and it worked like a charm.
Now in storyboard, and since i am not using any XIB file, i need to do the same thing.
Here's a snippet of my code:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
//Get the selected country
NSString *selectedAuthors = [theauthors objectAtIndex:indexPath.row];
//Initialize the detail view controller and display it.
Details *dvController = [[Details alloc] initWithNibName:#"Details" bundle:nil];
dvController.selectedAuthors = selectedAuthors;
[self.navigationController pushViewController:dvController animated:YES];
[dvController release];
dvController = nil;
}
My new Snippet :
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
//Get the selected country
NSString *selectedAuthors = [theauthors objectAtIndex:indexPath.row];
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"MainStoryboard.storyboard" bundle:nil];
Details *dvController = [storyboard instantiateViewControllerWithIdentifier:#"Details"]; //Or whatever identifier you have defined in your storyboard
//Initialize the detail view controller and display it.
//Details *dvController = [[Details alloc] init/*WithNibName:#"Details" bundle:nil*/];
dvController.selectedAuthors = selectedAuthors;
[self.navigationController pushViewController:dvController animated:YES];
[dvController release];
dvController = nil;
}
Application Log :
2012-07-17 16:30:15.760 AuthorsApp[6534:f803] WARNING: Using legacy cell layout due to delegate implementation of tableView:accessoryTypeForRowWithIndexPath: in <AuthorVC: 0x6857ba0>. Please remove your implementation of this method and set the cell properties accessoryType and/or editingAccessoryType to move to the new cell layout behavior. This method will no longer be called in a future release.
2012-07-17 16:30:16.167 AuthorsApp[6534:f803] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Storyboard (<UIStoryboard: 0x6867750>) doesn't contain a view controller with identifier 'Details''
*** First throw call stack:
(0x1595022 0x1726cd6 0x500fef 0x3151 0x1675c5 0x1677fa 0x9fc85d 0x1569936 0x15693d7 0x14cc790 0x14cbd84 0x14cbc9b 0x147e7d8 0x147e88a 0xd6626 0x1dc2 0x1d35)
terminate called throwing an exception(lldb)
Latest Application Log:
2012-07-17 16:35:15.352 AuthorsApp[6600:f803] WARNING: Using legacy cell layout due to delegate implementation of tableView:accessoryTypeForRowWithIndexPath: in <AuthorVC: 0x688d810>. Please remove your implementation of this method and set the cell properties accessoryType and/or editingAccessoryType to move to the new cell layout behavior. This method will no longer be called in a future release.
2012-07-17 16:35:15.912 AuthorsApp[6600:f803] Everything is ok now !
(lldb)
Final Log
Couldn't register com.test.erc.AuthorsApp with the bootstrap server. Error: unknown error code.
This generally means that another instance of this process was already running or is hung in the debugger.(lldb)
You could instantiate the controller that is located in your storyboard like this:
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:#"myStoryboard" bundle:nil];
Details *dvController = [storyboard instantiateViewControllerWithIdentifier:#"Details"]; //Or whatever identifier you have defined in your storyboard
Another option since you're using Storyboards would be using segues for the transitions. Here is a nice example. One thing that you get for free with segues is that the destination controller gets instantiated automatically for you. The delegate method looks like this:
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if([[segue identifier] isEqualToString:#"Details"]){
Details *dvController = (Details *)[segue destinationViewController];
// Pass any data to destination controller
// The transition is handled by the segue and defined in the Storyboard ('push' for example)
}
}
EDIT
Here is a screenshot for easy reference:
Hey I am working on an application that posts 50 location in a dynamic tableView and when you click on a location it will segue to a new tableView controller and posts 50 photos from that location. I created a tableViewController and then created a new file which contains all the files a tableView requires IE Cellforrowatindexpath. I have the segue connecting from the main tableViewcontroller but all the information is stored in the newfile which contains the methods that the tableViewController uses. Do I write PrepareForSegue in the tableViewController or do I write it in the file which has the methods that create the table? also if I write it in the tableViewCOntroller how do I access the cell name for one of the cells that are dynamically created? thanks.
-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if([segue.identifier isEqualToString:#"Photos for location"]){
//I dont know what to use for the name
[segue.destinationViewController setPhotoInPlace: WHAT DO I CALL THIS!?
}
}
The call names come from another file which uses public API to create an array of dictionaries which have information such as name and location. The file is called flickrFetcher. Here is code that dynamically creates the cells. self.brain is an instance of flickerFetcher and topPlaces is the method called from flickrFetcher to get the NSArray of NSdictionaries.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath: (NSIndexPath *)indexPath
{
// Create an instance of the cell
UITableViewCell *cell;
cell = [self.tableView dequeueReusableCellWithIdentifier:#"Photo Description"];
if(!cell)
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:#"Photo Description"];
// set properties on the cell to prepare if for displaying
//top places returns an array of NSDictionairy objects, must get object at index and then object for key
// the cellTitle has country then province, country goes in main title and province will go as subtitle.
NSString * cellTitle = [[[[self.brain class] topPlaces] objectAtIndex:self.location] objectForKey:#"_content"];
NSRange cellRange = [cellTitle rangeOfString:#","];
NSString * cellMainTitle = [cellTitle substringToIndex:cellRange.location];
cell.textLabel.text = cellMainTitle;
NSString* cellSubtitle = [cellTitle substringFromIndex:cellRange.location +2];
cell.detailTextLabel.text = cellSubtitle;
//location is an int property that allows a new selection when using objectAtIndex
self.location++;
return cell;
}
prepareForSegue: is a UIViewController method, so it needs to be in your view controller. The sender parameter should be your cell that caused the segue. You can use a table view method indexPathForCell: to get the related index path and that should be enough to find the same data you put into the cell when you implemented cellForRowAtIndexPath:.
(I'm not sure what you mean by "a new file" or what class it implements, so I can't say if that affects anything.)
I'm starting now with Xcode on 4.2 for iOS5 and there are a few changes and I'm now crossing a problem that I can't figure out a way to solve it.
I'm doing an example with a UITablwView that is populated programmatically with 2 Sections, 1st section with only 1 Row, and 2nd Section with 3 Rows.
My aim is to select a row from the table, and based on that row, the user will be redirected to different Views.
For example:
selecting section 0 row 0, app pushes to view 1 - name setting //
selecting section 1 row 0, app pushes to view 3 - address setting
The old fashion way, this is quite simple, just needed to init a UIViewController with initWithNibName and then push the view.
Now with the storyBoard everything changes, or at least I think it changes because I can't see how to get the same result since I can't set multiple segue's from the tableView to different UIViewControllers...and to do the old fashion way I can't see where I can get the NIB names from the views on the storyBoard to init an UIViewController to push.
Does any one knows how to get to this result??
Define two "generic" segues (identified as "segue1" and "segue2", for example) in the storyboard from your source view controller, one to each destination view controller. These segues won't be associated with any action.
Then, conditionally perform the segues in your UITableViewDelegate:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Conditionally perform segues, here is an example:
if (indexPath.row == 0)
{
[self performSegueWithIdentifier:#"segue1" sender:self];
}
else
{
[self performSegueWithIdentifier:#"segue2" sender:self];
}
}
I have the same problem as you do. The problem is that you can't link your tableViewCell to multiple view controllers. However you can link your source view itself to multiple view controllers.
Control-drag the master view controller (instead of table view cell) from the scene viewer to whatever view controller you want to link. You can do this as much as you want. Notice that the segue shown in source view controller scene should be something like "Push Segue from Root View Controller ..." instead of "Push Segue from NavCell to ...".
Identify each segue link a unique name like "toDetailView1"
Finally, custom the selection in your source view controllers:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row % 2 == 1) {
[self performSegueWithIdentifier:#"toDetailView1" sender:self];
} else {
[self performSegueWithIdentifier:#"toDetailView2" sender:self];
}
}
Like #陳仁乾 and #Marco explained was completely correct. To make everything a little bit easier I would recommend you to use a single NSArray which will be initialized when viewDidLoad. Just name the segues the same as your UIViewControllers, this way you can Display a correct description of what UIViewControllers you can choose from and you can also perform the segues from this NSArray:
(Actually I'm not sure if it can cause any problems calling the segue the same as the UIViewController you want to call. Please let me know if this is BadPractise)
viewDidLoad
- (void)viewDidLoad
{
[super viewDidLoad];
_arraySessions = [[NSArray alloc] initWithObjects:
#"MyViewControllerName", nil];
}
cellForRowAtIndexPath
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell =
[tableView dequeueReusableCellWithIdentifier:#"overviewCell"
forIndexPath:indexPath];
[cell.textLabel setText:_arraySessions[indexPath.row]];
return cell;
}
didSelectRowAtIndexPath
- (void)tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
[self performSegueWithIdentifier:_arraySessions[indexPath.row]
sender:self];
}
I was wondering if there was a way to have the user create/delete cells in a Table View but when they click on it, every cell that they create loads the same view. I have the first part created but I cannot seem to get it to load a view.
Simple create a new view and push on didSelectRowAtIndexPath Delegate method of UITableView.
For ex.
- (void)tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath{
DetailViewController *vController = [[DetailViewController alloc] initWithNibName:#"DetailViewController" bundle:nil];
[self.navigationController pushViewController:vController animated:YES];
[vController release];
}