I'm trying to create an application for the iPhone with a table of categories. If I select a category it will display a UIImage. However, I've been looking into it and I'm not sure exactly what to do. Can anyone lend a hand?
It sounds like the easiest solution would be to use a UITableView in a Navigation Based Application.
(Apple has samples on how to use this)
Load the table with your categories.
When the user selects a category, push a new View from a Nib file onto the navigation stack.
This will allow you to use the same Nib for all categories and you just pass the image to load to the class, which handles loading it into a UIImageView.
For example:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:NO];
imageCatView *catView = [[imageCatView alloc] initWithNibName: #"imageCatView" bundle: nil];
catView.categoryID = [[[categories objectAtIndex: _selectedRow] objectForKey:#"CatID"] intValue];
[[self navigationController] pushViewController:catView animated:YES];
[catView release];
}
Related
I have an app on the store that uses a RootViewController linking to a UIViewController (DetailController) and I am working on a new app which basically requires the need for this same feature. But instead, my new app has a UITableView inside a UIViewController linked to a UIViewController. So I thought, i'd copy and paste my RootViewController code into this new UIViewController. So i've linked up the TableView, set delegate and datasource to self and the TableView shows the titles of the items (Hurrah) but when touched, doesn't go to the DetailController? I've used NSLog to determine what part isn't working and of course its the didSelectRowAtIndexPath method… and here is my code
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSDictionary *theItem = [items objectAtIndex:indexPath.row];
DetailController *nextController = [[DetailController alloc] initWithItem:theItem];
[self.navigationController pushViewController:nextController animated:YES];
[nextController release];
}
The TableViewCell just highlights blue and doesn't link to DetailController.
Thanks in advance!
By "not working" do mean it's not being called, or that it's not pushing the view controller? If the first, then make sure the table view delegate is set correctly. If the second, make sure both nextController and self.navigationController are not nil.
I am building an app with several levels.
First level are the Tabs on the bottom of the screen. (MainWindow)
Second Level is the content displayed with each tab in a TableView (Locations)
Third Level is the detailed overview of the selected item in the Second level content. (LocationDetails)
First and Second levels work fine. Now I want to create the content of the detailled overview. I have created a new NIB called LocationDetails.xib. It only contains some static text (an inserted Text View). So I can view the loaded window.
In the Locations.m file I have the following function:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSString * locationCity = [[locations objectAtIndex:indexPath.row] objectForKey:#"city"];
NSLog(#"Your choice is: %#", locationCity);
Within this function I want to go to an other view (LocationDetails). What is the best way to go. If I haven't given you enough information, tell me! I can provide all the information you need!
Hope to hear from you soon!
With kind regards,
Douwe
I would use a navigation controller.
In your main xib file you would end up with something like this :
UITabBarViewController // Main Window
tab 1:
UINavigationController
UITableView // (Locations)
tab 2:
UINavigationController
UITableView // (Locations)
Then, the code to slide on your LocatonDetails is simple :
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
LocationDetailsViewController = [[LocationDetailsViewController alloc] initWithNibName:#"LocationDetails" bundle:nil];
controller setLocation:[locations objectAtIndex:indexPath.row]];
[[self navigationController] pushViewController:controller animated:YES];
[controller release];
}
I am doing a book kinda application using a viewBased application. The mainView acts as the backgroundView for loading pages. Each page is a different view and have its own nib. When i swipe on a page(actually on the mainView which have loaded the current view/page), that page will be removed and the next/previous page will be added.
[currentPage.view removeFromSuperview];
[self.view insertSubview:nextPage.view atIndex:0];
I have added a popoverController with a barbutton in this mainView. Its intialized with a tableviewController class named popClass. PopClass is another UITableViewController class which will act as the parent for the popViewController.
self.myPopController = [[PopController alloc] initWithStyle:UITableViewStylePlain];
self.myPopOverController = [[UIPopoverController alloc] initWithContentViewController:myPopController];
When I select certain row in the popover, I want the backgroundview(mainView) to load the page corresponding to the number of the row.
For that I have written a function in bookView(mainView) Controller class. And is calling it from the popOver's parent class when i select certain row.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSInteger toPageNumber = indexPath.row + 1;
[viewController changeToPage:toPageNumber];
}
Function and the lines of code are executing but nothing is happening. Even the log lines are printed but no action takes place. The code is the same for removing a page and adding another page which is working successfully when i swipe the view/page.
What is the problem? OR is there anyother way to make the view change in mainView by using the popover?
You need to have refernce of the background view controller in the popover controller.
In the PopController controller you should have a delagate like:
#interface PopController: UITablViewController{
//// other varibales;
id delegate;
}
#property (nonatomic, retain) id delgate;
Now from the class in which you are showing the popovercontroller
you should add this line:
[myPopController setDelegate:self];
Then you can easily acces any method of the main view controller class. By using
[delegate callTheRequiredMethod];
Hope this helps.
Thanks,
Madhup
It's hard to tell what's going wrong without looking at the code. That said, here's what I'd do:
(1) When a row is selected in mainView, present the popoverController modally:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
PopoverViewController *vc = [[PopoverViewController alloc] init];
[self.navigationController presentModalViewController:vc animated:YES];
[vc release];
}
(2) When something changes in the popoverController, for example a row is selected, set a value in the parentViewController (which should be the MainView):
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
self.parentViewController.value = someValue;
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
(3) Dismiss the popoverController where-ever you choose by calling:
[self dismissModalViewControllerAnimated:YES]`
I am working in a app where i have data in UITableView. It is like a drill down application. User will click on a row and will go to next page showing more records in a UITableView. But problem in my case is that i dont know upto how many level user can drill. The number of levels are not fixed. So now i am thinking to create and add the viewcontrollers programmatically. Is it possible?? if yes how?
thanks in advance.
UIViewController *controller = [[UIViewController alloc] init];
controller.view = whateverViewYouHave;
Do you have your own view controller that you coded? In that case you probably don't need to set the view property as it has been set in IB if that is what you used. When you have your controller you can push it onto the navigationController or view it modally etc.
UIViewControllers are always created programmatically. It sounds like you just need to have the same class for each level of view controller, e.g.:
//CoolViewController:UITableViewController
//CoolViewController.m
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
if (!self.isAtTopLevel) {
CoolViewController *cvc = [[CoolViewController alloc] initWithRecord:[self.records objectAtIndex:indexPath.row]];
[self.navigationController pushViewController:cvc animated:YES];
[cvc release];
} else {
//do something else
}
}
In this case, thingies would be some sort of recursive NSArray (i.e. an array of arrays).
I just filled my UITableView with Planets. I would like each cell clicked to open into a new Xib (if this sounds like the wrong approach please direct). I can get a secondviewcontroller working, its getting the thirdviewcontroller and fourthviewcontroller working? Thanks.
Place your main view controller (the one with the table) inside a UINavigationController. Then, when the user selects a row, push a new view controller onto it.
The following function will help. As Ben Gottlieb said your main view controller will need to be in a UINavigationController. You need to implement the delegate method for didSelectRowAtIndexPath and this is where you create the new controller for your new view and load it.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
YourViewController *controller = [[YourViewController alloc] initWithNibName:#"YourViewController"bundle:nil];
[[self navigationController] pushViewController:yourViewController animated:YES];
[yourViewController release]; // don't leak memory
}
Based on the row number you can decide which nib to load.