Passing data from ViewControllerA to ViewControllerB(QuickDialog)

Question

I'm new in iOS developer and QuickDialog.

I want to pass data from ViewControllerA to ViewControllerB.

It's work but in ViewControllerB i have a problem.

Example

In ViewControllerA.m

-(void) goToViewControllerB
{
    ViewControllerB *viewControllerB = [[ViewControllerB alloc]init];
    // send data 
    viewControllerB.ownerName = @"TestData";
    [self.navigationController pushViewController:viewControllerB animated:YES];
}

In ViewControllerB.h

@property (nonatomic, strong) NSString *ownerName;

In ViewControllerB.m

-(id) init
{
    NSLog(@"init");
    NSLog(@"ownerName : %@", _ownerName);

    self = [super initWithRoot:[self createViewElement]];

    return self;
}

-(void) viewDidLoad
{
    [super viewDidLoad];

    NSLog(@"viewDidLoad");
    NSLog(@"ownerName : %@", _ownerName);
}

- (void) viewWillAppear:(BOOL)animated
{
     [super viewWillAppear:animated];

     NSLog(@"viewDidLoad");
     NSLog(@"ownerName : %@", _ownerName);
}

In Method init I create Style of thisPage using QuickDialog.

In Method createViewElement I want to show data of _ownerName but it's NULL.

This is Output of this example code.

>> init
>> ownerName : (null)
>> viewDidLoad
>> ownerName : TestData
>> viewAppear
>> ownerName : TestData

I Want to use this Data in Method createViewElement.

How to resolve it.

P.S. I tried to call method createViewElement in viewDidLoad or viewWillAppear but it's not work.

If you're new to iOS, is there a reason why you're not using Storyboards? — nhgrif, Jan 23 '14 at 01:42
You obviously can't reference the data before it's there. One option is to pass ownerName as a parameter to init. — Hot Licks, Jan 23 '14 at 03:30

score 1 · Accepted Answer · edited Jan 23 '14 at 02:08

1

Your init method of ViewControllerB is called before you ever set the value of ownerName. See your first code snippet. You could alter your init to accept the string like this :

- (id)initWithOwner:(NSString*)theOwnerName

and then modify your ViewControllerA code to pass the owner name like this :

viewControllerB = [[ViewControllerB alloc] initWithOwner:@"TestData"];

edited Jan 23 '14 at 02:08

novalagung

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answered Jan 23 '14 at 01:35

Paul Dardeau

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Passing data from ViewControllerA to ViewControllerB(QuickDialog)

1 Answers1