Question

I am writing the iPhone application and I would like to ask about the the passing parameters in Objective-C.

I create 2 view controller. In the first one, I have a button, when a user press the button, it will call the -(IBAction) pressButton (user-defined), and after 5-6 second (have to process and retrieve the data in the NSMutableArray *), it will display a table. However, I don’t know how to pass the NSMutableArray to the table class. Can I do this?

// situation
// ---------------------------------------------
// In MyViewController.m

// class variable
NSMutableArray * arr;
- (IBAction) pressButton: (id)sender {...}
// I retrieve the data and store in the arr

// In TableView.m
// I want to pass the arr to here and use

I know how to create the table, but I don’t know how to pass the parameters from a class (MyViewController.m) to another class (TableView.m).

Answer 1

In your TableView ViewController create NSMutableArray like this

IBOutlet NSMutableArray  *PassedArray;
@property(nonatomic,retain) NSMutableArray  *PassedArray;
@synthesize PassedArray;
[PassedArray release];

Now you can pass NSMutableArray value from your Myviewcontroller to tableviewcontroller using this

tableviewcontroller *objInstance = [[tableviewcontroller alloc]initWithNibName:@"tableviewcontroller" bundle:nil];
objInstance.PassedArray = NSMutableArray;//Here you declare your passed NSMutableArray
[self.navigationController pushViewController:objInstance animated:YES];
[objInstance release];

Another method is Declare NSMutableArray *yourArray is global in MyViewController.h and extern those variables in tableviewcontroller.m like this

extern NSMutableArray *yourArray;