Question

I am new to IOS programming. So far I have been programming in android. So in android when pressing a button code for passing an argument would be like that:

Intent i = new Intent(MainScreen.this,OtherScreen.class);
Bundle b = new Bundle();
b.putString("data_1",data);
i.putExtras(b);
startActivity(i);

and on the activity that opens, i would write something like this:

Bundle b = getIntent().getExtras();
ski_center=b.getString("data_1");

what methods should I need to change in MainScreen and in OtherScreen in IOS to achieve the above.

Basically I will have 3 buttons lets say in my MainScreen and each of it will open the Otherview but each time a different parameter will be passed.

Foe example for each button i have code like these in MainScreen.m

@synthesize fl;
-(IBAction) ifl:(id) sender {
}

So I need your help in where to place the “missing” code, too.

Answer 1

Declare an iVar for your UIViewController ( Android’s Activity) like a property in Java.

In MainViewController.m

OtherUIViewController * contr = [[OtherUIViewController alloc] initWithNibname...];
contr.data = yourData;

Edited: added full code…

Intent i = new Intent(MainScreen.this,OtherScreen.class);
Bundle b = new Bundle();
b.putString(“data_1”,data);

here the MainScreen is the calling code, now in iOS it will be the MainUIViewcontroller

• create a OtherUIViewController like this:

OtherUIViewController.h

@interface OtherUIViewController : UIViewController
{
       NSData* data;
}
@property (strong, nonatomic) NSData* data;

in the OtherUIViewController.m

@implementation OtherUIViewController.m
@synthetize data;

// override
- (void)viewDidLoad
{
    [super viewDidLoad];
// do something with data here
}

to have the 3 different behaviors, the data can be an int, or an NSString.
And in the - (void)viewDidLoad you will check the data value and do 3 diff things.

I hope it helps