I've got a CollectionView which was programmatically created, now I want to switch to another CollectionView by selecting one of its Cells. Heres my code so far, but nothing happens:
-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath*)indexPath{
NSLog(#"Cell selected");
DetailCell *detailCell = [[DetailCell alloc] init];
[self.navigationController pushViewController:detailCell animated:YES];
}
Console says "Cell selected", so the CollectionView recognizes my touch, but the app won't switch to the other view. I've created a ViewController with the custom Class "DetailCell".
I'd check and make sure your self.navigationController isn't nil.
I just solved this problem :
mainView .m
cView = [[CollectionView alloc]init];
cView.view.frame = CGRectMake(0, 0, 320, 436);
cView.nav = self.navigationController;
[_contentScrollView addSubview:cView.view];
CollectionView.h
#property (nonatomic,weak) UINavigationController *nav;
CollectionView.m
-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath*)indexPath{
DetailCell *detailCell = [[DetailCell alloc] initWithDetails:_pageCategorie and: indexPath];
[_nav pushViewController:detailCell animated:YES];
}
Related
I am doing a small app and I am using a UISplitVIewController and I am trying to push the UITable cell text to the detail view and display it in a UITextField. I have managed to push the string nicely when i test it with a NSLog but when i apply to the UITextField it does not display not sure why here my method: (I am doing this using a storyboard)
-(void)pushModuleName:(NSString*)moduleName
{
self.Lv4ModuleTitleTextField.text = moduleName;
NSLog(#"name pushed%#",moduleName);
}
Not sure why this doesn't work.
[UPDATE]
UITableViewController.m (where the method is called)
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *selectedModule = [NSString stringWithFormat:#"%#",[_numberOfRows objectAtIndex:indexPath.row]];
Lv4GradeViewController *lv4 = [[Lv4GradeViewController alloc] initWithNibName:nil bundle:nil];
[lv4 pushModuleName:selectedModule];
}
You are creating a new instance of Lv4GradeViewController with the following code but no XIB file which will contain the text field:
Lv4GradeViewController *lv4 = [[Lv4GradeViewController alloc] initWithNibName:nil bundle:nil];
I would suggest you instantiate Lv4GradeViewController with the storyboard instantiateViewControllerWithIdentifier method:
Lv4GradeViewController *lv4 = [self.storyboard instantiateViewControllerWithIdentifier:#"IdentifierName"];
And remember to set the storyboard ID of the Lv4GradeViewController the same as IdentifierName in the storyboard.
The problem is that you're not getting a reference to the Lv4GradeViewController that you have on screen, you're creating a new one with alloc init. A split view controller, has a viewControllers array, with the controller at index 0 being the master controller, and the one at index 1 being the detail controller. So, the didSelectRowAtIndexPath method should look like this:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *selectedModule = [NSString stringWithFormat:#"%#",[_numberOfRows objectAtIndex:indexPath.row]];
Lv4GradeViewController *lv4 = self.splitViewController.viewControllers[1];
[lv4 pushModuleName:selectedModule];
}
I have the following situation. I have a view controller (ContentController) with 3 buttons at the top. Below I added a second view (contentView), this view should display content that are behind those 3 buttons. So every time I press a button, the contentView changes. So what I did was created three addition controllers.
FirstController.m, FirstController.h, FirstController.xib
SecondController.m, SecondController.h, SecondController.xib,
ThirdController.m, ThirdController.h, ThirdController.xib,
in my ContentController.m I added 3 IBActions that handles the change.
#interface ViewController ()
#property (nonatomic,strong) UIViewController *nextController;
#end
#implementation ViewController
#synthesize nextController = _nextController;
-(IBAction)chooseFirstController:(id)sender {
_nextController = [[FirstController alloc] initWithNibName:#"FirstController" bundle:nil];
[self.contentView addSubview:_nextController.view];
}
-(IBAction)chooseSecondController:(id)sender{
_nextController = [[SecondController alloc] initWithNibName:#"SecondController" bundle:nil];
[self.contentView addSubview:_nextController.view];
}
-(IBAction)chooseThirdController:(id)sender{
_nextController = [[ThirdViewController alloc] initWithNibName:#"ThirdViewController" bundle:nil];
[self.contentView addSubview:_nextController.view];
}
My first and ThirdController just showing tableviews inside the contentView of contentController. But in my secondController I used a gridView for displaying items. Now when I press a cell, it should go to a detailViewController, whichs shows more information about that cell. So in my cellForRowAtIndex I did the following.
- (void)gridView:(NRGridView *)gridView didSelectCellAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(#"cell clicked");
PlayerDetailController *playerController = [[PlayerDetailController alloc]initWithNibName:#"PlayerDetailController" bundle:nil];
[playerController setLblTest:#"hooray this works"];
[self.view addSubview:playerController.view];
}
It correctly executes setLblTest and also showing the detailViewcontroller inside my ContentView. But it don't changes the label. to my #"hooray" this works. But although as you can see in my log it passes it correctly.
#synthesize testLabel = _testLabel;
#synthesize lblTest = _lblTest;
-(void)setLblTest:(NSString *)lblTest{
if(![_lblTest isEqual:lblTest]){
_lblTest = lblTest;
}
NSLog(#"log komt %#",lblTest);
[_testLabel setText:lblTest];
}
LOG
RacingGenk[567:c07] log komt hooray this works
Hope this clarifies more my problem
Thank you
To get the label to update, you'll need to change your code to look like this.
self.testLabel.text = lblTest;
i am using a TableView in my application where i want a Pop over View when i clicked on a tabel cell, all the content which is in table Cell should display in a pop over view so plz suggest me how to do??
i have some sample code below which is not working..so suggest with code i want all the content in the cell to displayed in the pop over view.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UIView *aView = [[UIView alloc] init];
UIPopoverController *popoverController = [[UIPopoverController alloc]
initWithContentViewController:aView];
popoverController.popoverContentSize = CGSizeMake(320, 416);
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
[popoverController presentPopoverFromRect:cell.bounds inView:cell.contentView
permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
The UIPopoverController class reference clearly states
To display a popover, create an instance of this class and present it
using one of the appropriate methods. When initializing an instance of
this class, you must provide the view controller that provides the
content for the popover. Popovers normally derive their size from the
view controller they present
Your popoverController should have a view controller and not a view.
YourViewController *aViewController = [[YourViewController alloc] initWithNibName:nibName bundle:nil];
UIPopoverController *popoverController = [[UIPopoverController alloc]
initWithContentViewController:aViewController];
Then you can present this pop over
Your code is fine, but
You should have UIViewController instead UIView.
you have to pass the view controller instead of view
My RootViewController is a UITableViewController. A UINavigationController is added programmatically:
_navigationController = [[[UINavigationController alloc] initWithRootViewController:_rootViewController] autorelease];
[self.window addSubview:_navigationController.view];
[self.window makeKeyAndVisible];
Within the RootViewController.m the DetailViewController should be loaded when a row is selected:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(#"Switch to detail");
CCouchDBDocument *selectedObject = [self.contentsList objectAtIndex:indexPath.row];
DetailViewController *detailViewController = [[DetailViewController alloc] initWithNibName:#"DetailView" bundle:nil];
[self.view addSubview:detailViewController.view];
[detailViewController setDetailItem: selectedObject];
[self.navigationController pushViewController:detailViewController animated:YES];
[detailViewController release];
}
Without addSubView nothing happens on the screen. All the examples I've seen before only use pushViewController. And, loading the DetailView takes about 4 seconds. That's way too long (it's currently empty, just one label). When I try to set the navigationTitle (self.title = #"Hello";), the title remains the same from the RootViewController, so something must be wrong with the navigationController.
I tried to put everything in the AppDelegate and use a switchView method. The problem is the call for setDetailItem, which I can't call if I work with the switch method.
What would be the correct way to load the DetailView from the RootViewController into the navigation stack and possibly more from the DetailViewController later?
Update
I started from the beginning again with a Window-based application. Added a UITableViewController as "RootViewController" and initialised it with the UINavigationController in the AppDelegate (did absolutely nothing in the XIB). When I try to set self.navigationController.title = #"Test"; in ViewDidLoad, nothing happens.
What's wrong there?
You don't set the title of the DetailView when it's displayed using a UINavigationController by using self.title, you need to set the UINavigationItem title property in the DetailView initializer.
e.g. in the DetailView initializer :-
self.navigationItem.title = #"Hello";
You're right you shouldn't need to add the detailViewController view as a subview of the current view - you should just need the pushViewController call. I'm not sure why it's not appearing though.
Obvious questions are is everything connected OK in the nib, and what does the DetailView initializer do?
Can anyone tell me if this is possible?
I have a setup a UITableViewController which consists of a number of cells, if you select one of these cells you are taken to a new viewController using pushViewController (see below)
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSUInteger row = [indexPath row];
NSLog(#"CELL__: You tapped the row ... %#", [list objectAtIndex:row]);
TestController *testController = [[TestController alloc] init];
[[self navigationController] pushViewController:testController animated:YES];
[testController release];
}
If in the implementation for "TestController" I would like to refer back to [self navigationController] (or maybe to add yet another view) is there any way to do that. My problem is that I need to access [self navigationController] to push further views and I don't know how to do that from the bottom controller?
Does that make sense?
Gary
From within TestController you reference the same UINavigationController via [self navigationController] as well.
EDIT to elaborate after comment:
The navigationController property is a property of UIViewController. If the controller is contained within a UINavigationController then it's own navigationController property will be a reference to that container UINavigationController. The same applies for tabBarController and splitViewController.