Can anybody guide me how to do something like this:
I managed to do the 1st & the last screen, I need to put in another 1 in between them.
Is there any tutorial that i can learn from ?
thanks alot :)
Create a uinavigationcontroller with uitableview should help you achieve your goal here.
There are many tutorials for that. A quick google search landed me this. Basically you can use a single navigation controller and a single uitableviewcontroller class and create add the items to them. If you are unable to grasp the concepts from that tutorial add a comment here on where you are stuck. I will try to edit this post accordingly.
in screen1:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
Screen2 *screen2 = [[Screen2 alloc]initWithNibName:.......];
screen2.itsArray = [[NSMutableArray alloc] init];
if(indexPath.row == 1)
{
screen2.itsArray = yourArrayForScreen2_FirstRow;
}
else if(indexPath.row == 2){
screen2.itsArray = yourArrayForScreen2_SecondRow;
}else{ ...... }
[self.viewController pushViewCOntroller .....];
}
in screen2:
NSMutableArray *itsArray; #property and #snynthesize
now use itsArray as you need it. in screen2, do the same as in screen1 for the screen3
What you need is basically an NSMutableArray with NSMutableArray
for eg.
obj1,obj2,obj3...nil is the dict. in your example
NSMutableArray *middleScreenElement1 = [NSMutableArray arrayWithObjects:obj1,obj2,obj3...,nil];
NSMutableArray *middleScreenElement2 = [NSMutableArray arrayWithObjects:obj1,obj2,obj3...,nil];
NSMutableArray *middleScreenElement3 = [NSMutableArray arrayWithObjects:obj1,obj2,obj3...,nil];
NSMutableArray *firstScreen = [NSMutableArray arrayWithObjects:middleScreenElement1,middleScreenElement2,middleScreenElement3];
In your 1st TableView,add the following method..
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSMutableArray *middleScreenArray = (NSMutableArray*)[firstScreen objectAtIndex:indexPath.row];
NextTableViewController *nTVC = [NextTableViewController alloc]initWithArray:middleScreenArray];
}
now you can use the array to populate your table view just like the middle screen.
**note you have to create an initWithArray:(NSMutableArray*)array method in your middleScreenViewController
Hope it helps.. :)
Related
It's my first time using Storyboard to build an app. I'm trying to create a UITableView with a custom cell. I've created the cell in IB and created a custom tableViewCell class for it (added some labels, created appropriate outlets, connected them in IB and assigned the custom class to the custom cell in IB).
In the ViewController responsible for the TableView I create the data source (a dict with some arrays) and fill out all the obligatory methods (I've tried both with UITableViewControler and with a UIViewController that is set as a delegate and data source for the tableview)
And when I run the app - the tableview is empty. And after doing some NSLogging I've noticed that the data source methods are never executed. And I have NO IDEA why.
I'm going crazy about this for a few hours now. Please help me out :)
Let me know if you need to see the code or Storyboard, or whatever else.
UPDATE: Alright, after some digging, I've decided to test out the same code but using an NSMutableArray as data source instead of a NSMutableDictionary. And it works!
Now, could someone explain to me why it didn't work with a dict?
Here's what did. I had a dict with 5 arrays, and each array had 5 strings.
In the numberOfRowsForSection method, I returned [dict count]
And in the cellForRowAtIndexPath method, I've used this code
NSArray * routeArray = [dealsDict objectForKey:#"route"];
cell.routeName.text = [routeArray objectAtIndex:indexPath.row];
NSArray * companyArray = [dealsDict objectForKey:#"company"];
cell.companyName.text = [companyArray objectAtIndex:indexPath.row];
NSArray * priceArray = [dealsDict objectForKey:#"price"];
cell.priceLabel.text = [priceArray objectAtIndex:indexPath.row];
NSArray * dateArray = [dealsDict objectForKey:#"date"];
cell.dateLabel.text = [dateArray objectAtIndex:indexPath.row];
NSArray * monthArray = [dealsDict objectForKey:#"month"];
cell.monthLabel.text = [monthArray objectAtIndex:indexPath.row];
NSLog(#"I'm in here");
return cell;
why didn't it want to show anything?
In the IB, select your table view, and make sure that the delegate and dataSource outlets are set for your controller
UITableView need some collection dataset as data source. Its delegate method "cellForRowAtIndexPath" get called equals to number of elements of collection (ARRAY). like numberOfRowsInSection delegate tells the table view that it need to call cellForRowAtIndexPath for every element in collection. and it also need some iterator to read each time the next element, in case of dictionary it always stick to same data element at each call of cellForRowAtIndexPath. I hope it wil give you the idea of its working, Please let me know if you need anything else to know.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.data count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
MessagesCell *cell = [tableView dequeueReusableCellWithIdentifier:#"messageCellIdentifier"];
Message *msg = [self.data objectAtIndex:indexPath.row];
cell.Name.text = msg.Name;
cell.Message.text = msg.MessageText;
cell.Time.text = msg.Time;
return cell;
}
I have few table view controllers and I want selections from them to be shown on "ResultTableViewController". I also have array that collects the selected data and when i finally push it to the "ResultViewController" it shows only the last selection. Please help
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
firstarr = [[NSMutableArray alloc]init]; //array with questions
[self.firstarr addObject:[self.data objectAtIndex:indexPath.row]]; //collects the data properly
BodyDetailViewController* vc =[[BodyDetailViewController alloc] initWithNibName:#"BodyDetailViewController" bundle:nil];
vc.someArray = firstarr; //some array - ViewController with Results.
[self.navigationController pushViewController:vc animated:YES];
}
You have to remove this line :
firstarr = [[NSMutableArray alloc]init];
Because you're initializing your NSMutableArray each time you're selecting a cell, so all the data previously stored is erased and vc.someArray is getting an array with only your last selection, that's why ;)
Init your NSMutableArray outside the method, in your viewDidLoad for example
This...
firstarr = [[NSMutableArray alloc]init]; //array with questions
...creates a new array. Whatever was in firstarr previously is gone when you do a new selection.
Either create the array once somewhere else (when the object is initialized?) or append its content to vc.someArray instead of replacing it.
I'm brand new to Xcode and Objective-C, and fairly new to programming in general so please correct me if I have a severe misunderstanding.
Here's what I'd like to accomplish:
Create a Table View (empty upon startup)
Have user add and name cells via a Bar Button (pushes to a different view with a name Text Field and "Create" button I'm assuming)
Each created cell pushes to a new Table View with similar add/naming functionality
Then each of those cells push to a Text View
It seems to me that the best way to accomplish the first part is by populating a string array, then assigning those elements to the corresponding cells. That's where I get stuck.
How do I populate a Table View with an array?
Should I create a new secondary Table View for every cell, or just populate the same one differently depending on which parent cell is selected?
And same question as previous for the Text Views at the end of the chain...multiple Text Views or just different text passed each time?
If you got this far, I sincerely thank you and please let me know if I need to clarify anything.
I hope you know how to create a table view.
Now you should create a NSMutableArray to save your strings.
#property (retain) NSMutableArray *stringsArray = _stringsArray;
so your viewDidLoad will look like this.
- (void)viewDidLoad
{
[super viewDidLoad];
UITableView *myTableView = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStyleGrouped];
myTableView.dataSource = self;
myTableView.delegate = self;
[self.view addSubview:myTableView];
[myTableView release];
self.stringsArray = [NSMutableArray array];
}
Now the table view delegates
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return [self.stringsArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tmpTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"MainCell";
UITableViewCell *cell = [tmpTableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (nil == cell) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
cell.textLabel.text = [self.stringsArray objectAtIndex:indexPath.row];
return cell;
}
Now when you click on your barbutton to add new user, you must add it to strings array and just call [tableview reloadData];
I didn't understand why you want a text view.
Hope this helps!
Read from here for complete reference of uitableview UITableView Tutorial : Introduction to iPhone TableView
I need to add a TableView and i should be able to click several Items in that tableview and save it to a NSMutable dictionary or something suitable.
I know that you have to use a NSMutable Dictionary for this. But i don't understand how to do this.
Can someone please point a good tutorial or provide some sample codes for me.
You will have to use a delegate method for that.
First make sure your table view is set up well (delegate and datasource) and then
implement delegate 's :
(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath.
You access the selected row index with : [indexPath row].
And then you can store this value.
THere was a post by Matt Gallagher at Cocoa With Love about this that you might find illuminating.
A bit dated, but the principles will be the same.
It really depends on your data model.
First of all you need a NSMutableArray not a NSMutableDictionary;
//declare an NSMutableArray in the interface
#interface Class : SuperClass {
NSMutableArray *_arrayWithMySelectedItems;
}
//in one of your init/preparation methods alloc and initialize your mutable array;
- (void)viewDidLoad {
[super viewDidLoad];
_arrayWithMySelectedItems = [NSMutableArray alloc] init];
}
//now before you forget it add release in your dealloc method
- (void)dealloc {
[_arrayWithMySelectedItems release];
[super dealloc];
}
//add this following code to your didSelect Method part of tableView's delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
//if you have only one category, you will probably have something like this
[_arrayWithMySelectItems addObject:[dataModelArray objectAtIndex:indexPath.row];
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
You can use NSMutableDictionary in this method as:
(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSMutableDictionary *dict = [NSMutableDictionary alloc] init];
[dict setObject:[NSString stringWithFormat:"%#", cell.Label.text] forKey:[NSString stringWithFormat:"Key%d", indexPath.row]];
}
declare a string inside didselect row of tableview then give that string = [your populated array objectAtIndex:indexpath.row]; then add that into dictionary or nsmutable array according to your wish.
I’m populating a UITableView based on the values of an NSMutableArray. This table view has search results. If the user clicks in one of the results, one will navigate to another screen. If the user clicks “back”, the search results are filled in again. At this point, while the table view is being repopulated, the old values still appear, just as I want. However, since I’m doing:
- (void)viewWillAppear:(BOOL)animated
{
NSMutableArray *m = [[NSMutableArray alloc] init];
self.searchResultsArray = m;
[m release];
}
The old cells information is no longer available. Thus, the app crashes if the user clicks in one of the old cells or scrolls the UITableView because I’m accessing the mutable array which was reinitialized above.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSArray *cellArray = [searchResultsArray objectAtIndex:indexPath.row];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
appDelegate.selectedCell = [searchResultsArray objectAtIndex:indexPath.row];
}
Do you have any suggestions concerning how should I do this properly?
Thanks.
this is because you are re-initalizing the array each time the view comes back in focus, the array will then have 0 objects in, causing the issue when you select a row and reference an index in the array that simply was wiped when the viewWillAppear is called.
why not init ' self.searchResultsArray ' in viewDidLoad (remembering to undo this with release when the device receives memory warning)
let me know how you get on.
You should reset the array only when the view loads:
- (void)viewDidLoad
{
[super viewDidLoad];
NSMutableArray *m = [[[NSMutableArray alloc] init] mutableCopy];
self.searchResultsArray = m;
[m release];
}
You should always call the reloadData: method when changing the data in the UITableViewDataSourceDelegate instance.
Let me know if this helps
Please try below code:
- (void)viewWillAppear:(BOOL)animated
{
// Your search result array with your old values
// Now add or appened new data to your old search results.
[self.searchResultsArray addObject:#"Your Value 1"];
[self.searchResultsArray addObject:#"Your Value 2"];
[self.searchResultsArray addObject:#"Your Value 3"];
[self.tableView reloadData];
// if you need to add new values from a array put this code in a loop.
}
It should helps you...
Thx
It seems to me that you are not initialising the NSArray in the right method (viewDidLoad:).
Using XLData you don't have to care about where you set up the storage, reload the UITableView or add items to the NSArray (searchResultsArray) since it keeps track of the data (NSArray) and updates the UITableView accordingly and on the fly.