Question

I have two controllers A & B
In B there are one label and one string
In A i have write the below code

B *ObjB =[[B alloc]initWithNibName:@"B" bundle:nil];
ObjB.Mylabel.text=[NSString stringWithString:@"Add New name"];
ObjB.MyString=[NSString stringWithString:@"new string name"];
[self.navigationController pushViewController:ObjB animated:YES];
[ObjB release]; 

I am only getting the ObjB.MyString value in B , not getting the label text.Can any one help.Thanks in advance.

Answer 1

Well assuming that MyLabel is a UILabel (sidenote: avoid capitalized names for ivars – in Objc capitalized names are used [by convention] for Classes), the reason that the value is not set is because the view hierarchy of your B controller has not yet been loaded (ie your label is nil at this point). So you got three options:

1. Force the view hierarchy to load & then set your label:

   [ObjB loadView]; // Note: Apple says that you never should call this directly (just to illustrate my point)!!

2. Let the system load the hierarchy for you by requesting the view first:

   id view = ObjB.view; // This is a bit of a 'hack' actually

3. Just add another property in your B controller, set that and on viewDidLoad set your label’s text (This is the best option in my opinion)