I'm making a small iPad APP using the SplitViewController and I mainly working with MasterViewController on the DetailViewController. I am trying to Push some data from the DetailViewController to MasterViewController. once the information is pushed to the MasterViewController I want to make use of it so to do this im using a pop method.
The push method populates the array- but for some reason my array is recreated every time i call the pushModuleTitle method and it only hold one object at a time.
In the DetailViewController.m
- (IBAction)buttonAddPressed:(id)sender
{
cw3MasterViewController *master = [[cw3MasterViewController alloc]init];
[moduleTitles addObject:textFieldModuleTitle.text];
[master pushModuleTitle:self.textFieldModuleTitle.text];);
}
In the MasterViewController.m
- (NSMutableArray *)moduleTitleStack//init array
{
if (!_moduleTitleStack){
_moduleTitleStack = [[NSMutableArray alloc] init];
}
return _moduleTitleStack;
}
-(void)pushModuleTitle:(NSString*)moduleTitile
{
NSString * moduleTitileObject = moduleTitile;
[self.moduleTitleStack addObject:moduleTitileObject];
NSLog(#"%#",self.moduleTitleStack);
}
so to use the information pushed I'm using this pop method: - But this alway returns me a null value and when I put a break point it indicates that my moduleTitleStack has 0 objects. I'm not sure why.
-(NSString *)popModuleTitle
{
NSString * moduleTitileObject = [self.moduleTitleStack lastObject];
if (moduleTitileObject)[self.moduleTitleStack removeLastObject];
return moduleTitileObject;
}
calling the popModuleTitle method: Gives a null value
- (IBAction)testButtonPressed:(id)sender {
NSLog(#"%#", [self popModuleTitle]);
}
The reason is the same as the answer to the other question you just asked. You are creating a new instance of cw3MasterViewController every time you click the button. You should get a reference to the master controller like this:
cw3MasterViewController *master = self.splitViewController.viewControllers[0];
This assumes that master is the only controller at index 0 of the split view controller. If it's embedded in a navigation controller (which it often is), then you would need to go a little further to get to master:
cw3MasterViewController *master = (cw3MasterViewController *)[(UINavigationController *) self.splitViewController.viewControllers[0] topViewController];
ere :
w3MasterViewController *master = (cw3MasterViewController *)[(UINavigationController *) self.splitViewController.viewControllers[0] topViewController];
you have a Semantic Issue: Subscript requires size of interface 'NSArray', which is not constant in non-fragile ABI
Use Delegation instead !
Related
AAA.m:
- (void)keepCurrentArray:(id)object
{
_currentTest=[[NSMutableArray alloc]init];
[_currentTest addObject:#"one"];
[_currentTest addObject:#"two"];
[_currentTest addObject:object];
NSLog(#"My Array is:%#",_currentTest);
}
Class BBB.m is passing objects to class AAA.
Right now if i'm passing X to the above method so the array will be: one,two,X . Then i'll send it Y and the array will be one,two,Y instead of what i want to accomplish: one,two,x,one,two,y.
Is that because I'm alloc and init _currentTest every time? How can I solve it?
Update:
I had a few suggestions on how to solve this and none of them worked for me. I've created a new project with just the code in the answers and i'm still getting the same result when I try to add the second object i get: one, two, test instead of one,two,test,one,two,test
Yes, it's because that you're alloc and init-ing every time you run that method. Instead, put _currentTest = [[NSMutableArray alloc] init]; in AAA.m's init method.
AAA.m
-(id)init
{
if ((self = [super init]))
_currentTest = [[NSMutableArray alloc] init];
return self;
}
- (void)keepCurrentArray:(id)object
{
[_currentTest addObject:#"one"];
[_currentTest addObject:#"two"];
[_currentTest addObject:object];
NSLog(#"My Array is:%#",_currentTest);
}
_currentTest=[[NSMutableArray alloc]init]; in a method is never a good thing!!!
As per naming convention it seems to be a property to the AAA Class. So for property, the alloc+init should be either in init or awakeFromNib. So that if is initialized just once.
However in some situations init is called more than once then your previous values are lost and new set are added.
So what you can do is make another class and put this _currentTest Array there and make it static and use it here. I hope this will work fine. And make sure in the init method of that class it is initialized just once, as :
//**this is not compiled and checked may contains typo and errors**
#implementation Storage
static NSMutableArray *yourStaticArray;
-(id)init{
self = [super init];
if (self) {
if (!yourStaticArray) {
yourStaticArray=[NSMutableArray new];
}
}
return self;
}
-(void)addYourStaticArray:(NSString *)val{
[yourStaticArray addObject:val];
}
-(NSArray *)yourStaticArray {
return yourStaticArray ;
}
#end
Well you need to have a property for that _currentTest if you want to be able to keep it around between method call.
Put this in your .h file
#property (nonatomic, copy) NSMutableArray * currentTest;
And this in hour .m file
- (NSMutableArray *)currentTest
{
if (!_currentTest)
_currentTest = [[NSMutableArray alloc] initWithCapacity:11];
return _currentTest;
}
- (void)keepCurrentArray:(id)object
{
[self.currentTest addObject:#"one"];
[self.currentTest addObject:#"two"];
[self.currentTest addObject:object];
NSLog(#"My Array is:%#", self.currentTest);
}
I Just try the code you've put on drop box and it's working exactly as it is suppose to, the array keeps it's value and everything,
BUT
Exactly as it is suppose to is not what you are trying to achieve
Your problem is not in AAA.m, your problem is in BBB.m
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
ViewController *kios = [ViewController new];
[kios keepCurrentArray:#"Test"];
[kios keepCurrentArray:#"Test2"];
}
I took the liberty of adding the #"test2" to the code you've send. If you run it you will see that your array still exist when the second call is made.
The REAL problem here is that you are creating a NEW ViewController each time. A brand new one, it is normal that it is empty (clean), it's a new one.
If I buy a note pad monday and fill it up, I don't expect when I'm buying an other one on friday to be already fill with the stuff I've wrote on monday in the previous one.
But this is exactly that behaviour that you are expecting from your ViewController.
You need to store your NSMutableArray in an other object that doesn't
get destroy and created over and over again.
This is happening because you are creating a new array every time that your method is called. Basically, you need to see if it has already been created, and only create it if needed. You can change your method to:
- (void)keepCurrentArray:(id)object
{
if (!_currentTest)
{
_currentTest=[[NSMutableArray alloc]init];
}
[_currentTest addObject:#"one"];
[_currentTest addObject:#"two"];
[_currentTest addObject:object];
NSLog(#"My Array is:%#",_currentTest);
}
EDIT:
In addition to the above problem, you also have this code which needs to be corrected (comments removed):
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
ViewController *kios = [ViewController new];
[kios keepCurrentArray:#"Test"];
}
This code creates a new instance of ViewController every time that you click on a row in the table. Because you are creating a new instance instead of reusing the old one, you start with an empty array each time. In order to keep adding to the same array, you need to keep using the same view controller.
In order to do this, you need to add a declared property to your .h file, similar to your currentTest declared property:
#property (strong,nonatomic) ViewController *kios;
Then, change your action so that you only create a new view controller if needed (the first time) and then reuses it after that:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (!_kios)
{
_kios = [ViewController new];
}
[_kios keepCurrentArray:#"Test"];
}
I have a problem with a #sum binding of a column in my program:
I'm doing a Coredata, NSPersistentDocument based program. I'm doing mostly everything from IB, the creation of the data model, NSArrayController and NSTableView...
I have just 1 entity with 62 attributes (61 NSString and 1 NSNumber). I import a CSV file with 12722 records. Import works well, can save to xml, binary, sqlite... I've double checked that the overall process works perfect. Can save/load. Everything is there.
The problem that I have: I've created a label that I BIND to #sum of the column with the NSNumber property. This is how I did
> label->Bindings Inspector->Value
> Bind to: My_Entity_NSArrayController
> Controller Key: selection
> Model Key Path: #sum.myNumericAttribute
When I run the program, click on Import, Select ALL the rows, the #sum works well. It's fast, however and here is the first problem: once I save the file (tried all... binary/xml/sqlite) and later load it and try to Select ALL again, the program crash without error.
Tried through "Profile"->Allocations. I noticed:
I don't have memory leaks
When loading from disk and then select all: Goes extremelly slow. After 5 minutes didn't yet finished (I stopped it) and I saw +45MB of CFNumber (Live Bytes) and >1.500.00#Overall. So, something is wrong here, as I'm talking about 12722 rows/registers of type Interger32.
The second problem is the same but reproduced from a different angle. Instead of using "selection" I've tried to use "arrangedObjects".
In this case the problem appears even while importing from CSV, it goes extremely slow and it finally crash. Trying to open an already created file also crash.
This is how I did label->Bindings Inspector->Value
> label->Bindings Inspector->Value
> Bind to: My_Entity_NSArrayController
> Controller Key: arrangedObjects
> Model Key Path: #sum.myNumericAttribute
Can you please help me with some light on what to look for or ideas that can help me find where the problem is?.
Thanks a lot.
Luis
---- NEW EDIT AFTER MORE RESEARCH ----
I've found a workaround which I DONT' UNDERSTAND, please comments/answers really appreciated.
My program uses Coredata (SQLite), NSPersistentDocument, NSTableView and an NSArrayController. I want to have a working NSTextField bound to a #sum Collection Operation
Problem: As soon as I open an existing document with SQLite DB populated and I try to bind to the arrangedObjects.#sum.t_24_Bookings from the NSWindowController, the program crash.
My initial guess it's related to the Cannot access contents of an object controller after a nib is loaded however I've followed the recommendation of performing a first Fetch like this without success:
- (void) awakeFromNib
{
:
BOOL ok = [[self out_CtEn_Transaction] fetchWithRequest:nil merge:NO error:&error];
:
Continuing with this idea I've found that if I create a "real" complete Fetch + I perform a #sum access from the Document subclass, then it works.
Here is the code with comments I've put in place in order to have the workaround working.
ABDocument interface (a NSPersistentDocument subclass)
#interface ABDocument : NSPersistentDocument {
BOOL ivNewDocument;
NSArray *ivFetchedTransactions;
NSNumber *ivTotalBookings;
}
#property (nonatomic, getter=isNewDocument) BOOL newDocument;
#property (nonatomic, retain) NSArray *fetchedTransactions;
#property (nonatomic, retain) NSNumber *totalBookings;
:
ABDocument implementation
#import "ABDocument.h"
#import "ABWindowController.h"
#implementation ABDocument
#synthesize newDocument = ivNewDocument;
#synthesize totalBookings = ivTotalBookings;
#synthesize fetchedTransactions = ivFetchedTransactions;
:
/** #brief Create one instance of my custom NSWindowController subclass (ABWindowController)
*
* In my NSPersistentDocument I do override makeWindowControllers, where I create
* one instance of my custom NSWindowController subclass and use addWindowController:
* to add it to the document.
*
*/
- (void) makeWindowControllers
{
// Existing Document?
if ( ![self isNewDocument]) {
// NSLog(#"%#:%# OPENING EXISTING DOCUMENT", [self class], NSStringFromSelector(_cmd));
// Opening existing document (also has an existing DDBB (SQLite)), so
// make sure I do perform a first complete "fetch + #sum" to void issues
// with my NIB bind's.
[self firstFetchPreventsProblems];
}
// Now I can create the Window Controller using my "MainWindow.xib".
ABWindowController *windowController = [[ABWindowController alloc] init];
[self addWindowController:windowController];
[windowController release];
}
/** #brief First complete "fetch + #sum" to void issues with my NIB bind's.
*
* Before I create the Window Controller with "MainWindow.xib" I have to perform a
* first Fetch AND also retrieve a #sum of an NSNumber column.
*
* My NIB has an NSTextField BOUND to #arrangedObjects.#sum.<property> through a NSArrayController
* If I don't call this method before the NIB is loaded, then the program will crash.
*
*/
- (void) firstFetchPreventsProblems {
// Prepare the Fetch
NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:#"Transaction"];
// 1) Perform the Fetch
NSError *error = nil;
[self setFetchedTransactions:[[self managedObjectContext ] executeFetchRequest:request error:&error]];
if ([self fetchedTransactions] == nil)
{
NSLog(#"Error while fetching\n%#",
([error localizedDescription] != nil) ? [error localizedDescription] : #"Unknown Error");
exit(1);
}
// 2) Execute Collection Operation #sum
[self setTotalBookings:[[self fetchedTransactions] valueForKeyPath:#"#sum.t_24_Bookings"]];
}
ABWindowController (The controller that loads my NIB)
- (void)windowDidLoad
{
:
// PROGRAM CRASH HERE
// IF [self firstFetchToPreventsProblems]; is NOT CALLED
// ABDocument's "makeWindowControllers:"
[[self totalSumField] bind: #"value" toObject: [self out_CtEn_Transaction]
withKeyPath:#"arrangedObjects.#sum.t_24_Bookings" options:nil];
}
Please If you can comment really appreciated, I've got a solution but I don't understand why.
Tanks,
Luis
I found the problem myself after several days researching. It was easy (now that I know):
In parallel I was creating a secondary thread and happened that I was accessing the data model from two different threads. As it's been explained in several Q&As here in Stackoverflow, it's very dangerous.
I've applied the commented solutions in several posts of creating a secondary MOC in the secondary thread.
Now my code is thread safe as per coredata related actions, so program is not crashing.
Thanks again to the community.
Luis
I am writing an app which is a sort of dictionary - it presents the user with a list of terms, and when clicked on, pops up a dialog box containing the definition. The definition itself may also contain terms, which in turn the user can click on to launch another definition popup.
My main app is stored in 'myViewController.m'. It calls a custom UIView class, 'CustomUIView.m' to display the definition (this is the dialog box that pops up). This all works fine.
The text links from the CustomUIView then should be able to launch more definitions. When text is tapped in my CustomUIView, it launches another CustomUIView. The problem is, that this new CustomUIView doesn't have access to the hash map which contains all my dictionary's terms and definitions; this is only available to my main app, 'myViewController.m'.
Somehow, I need to make my hash map, dictionaryHashMap, visible to every instance of the CustomUIView class. dictionaryHashMap is created in myViewController.m when the app opens and doesn't change thereafter.
I don't wish to limit the number of CustomUIViews that can be opened at the same time (I have my reasons for doing this!), so it would be a little resource intensive to send a copy of the dictionaryHashMap to every instance of the CustomUIView. Presumably, the solution is to make dictionaryHashMap a global variable.
Some of my code:
From myViewController.m:
- (void)viewDidLoad
{
self.dictionaryHashMap = [[NSMutableDictionary alloc] init]; // initialise the dictionary hash map
//... {Code to populate dictionaryHashMap}
}
// Method to pop up a definition dialog
- (void)displayDefinition:(NSString *) term
{
NSArray* definition = [self.dictionaryHashMap objectForKey:term]; // get the definition that corresponds to the term
CustomUIView* definitionPopup = [[[CustomUIView alloc] init] autorelease]; // initialise a custom popup
[definitionPopup setTitle: term];
[definitionPopup setMessage: definition];
[definitionPopup show];
}
// Delegation for sending URL presses in CustomUIView to popupDefinition
#pragma mark - CustomUIViewDelegate
+ (void)termTextClickedOn:(CustomUIView *)customView didSelectTerm:(NSString *)term
{
myViewController *t = [[myViewController alloc] init]; // TODO: This instance has no idea what the NSDictionary is
[t displayDefinition:term];
}
From CustomUIView.m:
// Intercept clicks on links in UIWebView object
- (BOOL)webView: (UIWebView*)webView shouldStartLoadWithRequest: (NSURLRequest*)request navigationType: (UIWebViewNavigationType)navigationType {
if ( navigationType == UIWebViewNavigationTypeLinkClicked ) {
[myViewController termTextClickedOn:self didSelectTerm:request];
return NO;
}
return YES;
}
Any tips on how to make the dictionaryHashMap visible to CustomUIView would be much appreciated.
I have tried making the dictionaryHashMap global by doing the following:
Changing all instances of 'self.dictionaryHashMap' to 'dictionaryHashMap'
Adding the line 'extern NSMutableDictionary *dictionaryHashMap;' to CustomUIView.h
Adding the following outside of my implementation in myViewController.m: 'NSMutableDictionary *dictionaryHashMap = nil;'
However, the dictionaryHashMap remains invisible to CustomUIView. As far as I can tell, it actually remains a variable which is local to myViewController...
It's not resource-intensive to pass around the reference (pointer) to dictionaryHashMap. A pointer to an object is only 4 bytes. You could just pass it from your view controller to your view.
But I don't know why you even need to do that. Your view is sending a message (termTextClickedOn:didSelectTerm:) to the view controller when a term is clicked. And the view controller already has a reference to the dictionary, so it can handle the lookup. Why does the view also need a reference to the dictionary?
Anyway, if you want to make the dictionary a global, it would be more appropriate to initialize it in your app delegate, in application:didFinishLaunchingWithOptions:. You could even make the dictionary be a property of your app delegate and initialize it lazily.
UPDATE
I didn't notice until your comment that termTextClickedOn:didSelectTerm: is a class method. I assumed it was an instance method because myViewController starts with a lower-case letter, and the convention in iOS programming is that classes start with capital letters. (You make it easier to get good help when you follow the conventions!)
Here's what I'd recommend. First, rename myViewController to MyViewController (or better, DefinitionViewController).
Give it a property that references the dictionary. Whatever code creates a new instance of MyViewController is responsible for setting this property.
Give CustomUIView properties for a target and an action:
#property (nonatomic, weak) id target;
#property (nonatomic) SEL action;
Set those properties when you create the view:
- (void)displayDefinition:(NSString *)term {
NSArray* definition = [self.dictionaryHashMap objectForKey:term];
CustomUIView* definitionPopup = [[[CustomUIView alloc] init] autorelease]; // initialise a custom popup
definitionPopup.target = self;
definitionPopup.action = #selector(termWasClicked:);
...
In the view's webView:shouldStartLoadWithRequest: method, extract the term from the URL request and send it to the target/action:
- (BOOL)webView: (UIWebView*)webView shouldStartLoadWithRequest: (NSURLRequest*)request navigationType: (UIWebViewNavigationType)navigationType {
if ( navigationType == UIWebViewNavigationTypeLinkClicked ) {
NSString *term = termForURLRequest(request);
[self.target performSelector:self.action withObject:term];
return NO;
}
return YES;
}
In the view controller's termWasClicked: method, create the new view controller and set its dictionary property:
- (void)termWasClicked:(NSString *)term {
MyViewController *t = [[MyViewController alloc] init];
t.dictionary = self.dictionary;
[t displayDefinition:term];
}
Create a class that will be used as singleton. Example.
You Should always keep your data in separate class as the mvc pattern suggest and that could be achieved by using a singleton class for all your dictionary terms and accesing them from every custom view when needed.
I am trying to nest NSCollection view inside of one another. I have tried to create a new project using the Apple Quick Start Guide as a base.
I start by inserting a collection view into my nib, to the view that is automatically added I drag another collection view onto it. The sub-collection view added gets some labels. Here is a picture of my nib:
I then go back and build my models:
My second level model .h is
#interface BPG_PersonModel : NSObject
#property(retain, readwrite) NSString * name;
#property(retain, readwrite) NSString * occupation;
#end
My First level model .h is:
#interface BPG_MultiPersonModel : NSObject
#property(retain, readwrite) NSString * groupName;
#property(retain,readwrite) NSMutableArray *personModelArray;
-(NSMutableArray*)setupMultiPersonArray;
#end
I then write out the implementation to make some fake people within the first level controller(building up the second level model):
(edit) remove the awakefromnibcode
/*- (void)awakeFromNib {
BPG_PersonModel * pm1 = [[BPG_PersonModel alloc] init];
pm1.name = #"John Appleseed";
pm1.occupation = #"Doctor";
//similar code here for pm2,pm3
NSMutableArray * tempArray = [NSMutableArray arrayWithObjects:pm1, pm2, pm3, nil];
[self setPersonModelArray:tempArray];
} */
-(NSMutableArray*)setupMultiPersonArray{
BPG_PersonModel * pm1 = [[BPG_PersonModel alloc] init];
pm1.name = #"John Appleseed";
pm1.occupation = #"Doctor";
//similar code here for pm2,pm3
NSMutableArray * tempArray = [NSMutableArray arrayWithObjects:pm1, pm2, pm3, nil];
return tempArray;
}
Finally I do a similar implementation in my appdelegate to build the multiperson array
- (void)awakeFromNib {
self.multiPersonArray = [[NSMutableArray alloc] initWithCapacity:1];
BPG_MultiPersonModel * mpm1 = [[BPG_MultiPersonModel alloc] init];
mpm1.groupName = #"1st list";
mpm1.personModelArray = [mpm1 setupMultiPersonArray];
(I'm not including all the code here, let me know if it would be useful.)
I then bind everything as recommended by the quick start guide. I add two nsarraycontrollers with attributes added to bind each level of array controller to the controller object
I then bind collectionview to the array controller using content bound to arrangedobjects
Finally I bind the subviews:
with the grouptitle label to representedobject.grouptitle object in my model
then my name and occupation labels to their respective representedobjects
I made all the objects kvo compliant by including the necessary accessor methods
I then try to run this app and the first error I get is: NSCollectionView item prototype must not be nil.
(edit) after removing awakefromnib from the first level model I get this
Has anyone been successful at nesting nscollection views? What am I doing wrong here? Here is the complete project zipped up for others to test:
http://db.tt/WPMFuKsk
thanks for the help
EDITED:
I finally contacted apple technical support to see if they could help me out.
Response from them is:
Cocoa bindings will only go so far, until you need some extra code to make it all work.
When using arrays within arrays to populate your collection view the
bindings will not be transferred correctly to each replicated view
without subclassing NSCollectionView and overriding
newItemForRepresentedObject and instantiating the same xib yourself,
instead of using the view replication implementation provided by
NSCollectionView.
So in using the newItemForRepresentedObject approach, you need to
factor our your NSCollectionViewItems into separate xibs so that you
can pass down the subarray of people from the group collection view to
your inner collection view.
So for your grouped collection view your override looks like this:
- (NSCollectionViewItem *)newItemForRepresentedObject:(id)object
{
BPG_MultiPersonModel *model = object;
MyItemViewController *item = [[MyItemViewController alloc] initWithNibName:#"GroupPrototype" bundle:nil];
item.representedObject = object;
item.personModelArray = [[NSArrayController alloc] initWithContent:model.personModelArray];
return item;
}
And for your inner collection subclass your override looks like this:
- (NSCollectionViewItem *)newItemForRepresentedObject:(id)object
{
PersonViewController *item = [[PersonViewController alloc] initWithNibName:#"PersonPrototype" bundle:nil];
item.representedObject = object;
return item;
}
here is a sample project that they sent back to me -
http://db.tt/WPMFuKsk
I am still unable to get this to work with my own project. Can the project they sent back be simplified further?
Please take a closer look at this answer
Short answer:
Extracting each NSView into its own .xib should solves this issue.
Extended:
The IBOutlet’s specified in your NSCollectionViewItem subclass are not connected when the prototype is copied. So how do we connect the IBOutlet’s specified in our NSCollectionViewItem subclass to the controls in the view?
Interface Builder puts the custom NSView in the same nib as the NSCollectionView and NSCollectionViewItem. This is dumb. The solution is to move the NSView to its own nib and get the controller to load the view programmatically:
Move the NSView into its own nib (thus breaking the connection between the NSCollectionViewItem and NSView).
In I.B., change the Class Identity of File Owner to the NSCollectionViewItem subclass.
Connect the controls to the File Owner outlets.
Finally get the NSCollectionViewItem subclass to load the nib:
Usefull links:
how to create nscollectionview programatically from scratch
nscollectionview tips
attempt to nest an nscollectionview fails
nscollectionview redux
I have a viewController called "chooseDateViewController" where in the .m file it takes input from the user and puts into a string. I have another viewController called "showTable" where I have a custom made table that takes the dates in the string. the table is generated (in showTable.m) based on the dates (which are strings).
I want to be able to call "showTableViewController" view controller when the user enters the data and presses a button so then they are taken to the showTableViewController with there dates nicely displayed but my problem is I cannot pass the data from the "chooseDate" View controller to a method in "showTable". This is how I did it but it is not working... I tried to NSLog it but its not even entering the function. If anyone knows why, it would be much appreciated.
Thanks
// In chooseDateViewController.m
-(void) sendValue {
NSString *date= #"July 25 2012";
UIViewController *view5 = [[showTableViewController alloc] initWithNibName:#"showTableViewController" bundle:nil];
[self.navigationController pushViewController:view5 animated:YES];
[view5 receiveNumbers:date]; //trigger the method in showTable.m
[view5 release];
}
// showTableViewController.m
-(void) receiveNumbers: (id) sender {
NSLog (#"data received is %#", sender);
}
Perhaps you can initialize the viewController with the information, so for example, you can have a line that is like:
UIViewController *view5 = [[showTableViewController alloc] initWithSomeInfo: (the structure that houses the data)];
Then in the custom init method of the showTableViewController, you can process the data before you are pushing the view controller.
I hope this helps,
Tams
Here is some code that you were looking for:
In the showTableViewController, you have have a variable to hold the passed in information so:
- (id)initWithSomeInfo(NSArray*)info{
self = [super init];
if(self){
myOwnVariable = info;
[self processInfo:myOwnVariable];
}
return self;
}