Passing data from ViewController to UIView

Question

Possible Duplicate:
Passing Data between View Controllers

I have on FirstViewController an array with float value. I need to pass to my View this array when the user clicks on a button. This button will call the View and draw the points informed.

Answer 1

1. In your FirstViewController.h write

#include <UIKit/UIKit.h>
extern NSArray *yourArray;

And in your FirstViewController.m write

#import "FirstViewController.h"
@interface FirstViewController ()
@end
NSArray *yourArray;

Now you'll have to import the whole FirstViewController in your "MyView"-Class. Simply #import "FirstViewController.h" in MyView.m. After doing so, "yourArray" will be available in MyView.

Or, 2., you could write something like this into MyView.h:

- (void)drawRect(NSArray *)yourArray;

and in your FirstViewController.m, simply pass the data: (don't forget to #include MyView.h)

MyView *myView = [[MyView alloc]init];
[myView drawRect:yourArray]; //You'll have to pass "yourArray", to the function in MyView, which is going to be called

Or, 3., if you're using storyboard, you could

- (IBAction)pushedButton(UIButton *)sender {
[self performSegueWithIdentifier:@"pushButton" sender:self];
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:@"pushButton"] {
MyView *destinationViewController = segue.destinationViewController;
destinationViewController.yourArray = yourArray; // you'll have to define yourArray in the .h File
}
}