set UITextField.text from another class

Question

I have two views, and i'm trying to show text that i getting from first view in UITextField of another . Second view shown by - (source) so methods ViewWillAppear and ViewDidLoad won't work. And viewDidLoad method of second view is runs when app is started.

I'm tried to make method of second class

secondClass.h:

@property (strong, nonatomic) IBOutlet UITextField *itemName;//all hooked up in storyboard
-(void)SetName:(NSString *)name;

secondClass.m:

-(void)SetName:(NSString *)name{
    NSLog(@"%@",name);
    itemName.text = name;//itemName - textField
}

and use it in first one:

secondViewConroller *secondView = [[secondViewConroller alloc]init];
[secondView SetName:@"Bill"];

NSlog shows "Bill" but textField.text won't change anything.

My guess that app shows UITextField without changes because it shows second view that it gets from viewDidLoad method and i need to update it somehow

My question: What is the best approach to change attributes of UI elements from different classes?

score 0 · Answer 1 · answered Feb 13 '13 at 00:53

0

Easiest way:

secondViewConroller.h :

@property NSString * conversationName;

secondViewConroller.m :

@synthesize conversationName;

-(void)SetName:(NSString *)name{
    NSLog(@"%@",name);
    itemName.text = conversationName
}

On alloc:

secondViewConroller *secondView = [[secondViewConroller alloc]init];
conversationName = @"Set this text";
[secondView SetName:@"Bill"];

I would suggest you to read about Protocols after that.

answered Feb 13 '13 at 00:53

Dark Matter

3,638
3
14
14

it's basically the same that i wrote but with nsstring property. I'm having the same result – Vlad Z. Feb 13 '13 at 08:39

score 0 · Answer 2 · answered Feb 13 '13 at 08:02

0

Easiest way: in secondViewConroller.h :

@property (nonatomic, retain) NSString *stringName;

secondViewConroller.m :

@synthesize stringName;

and in viewDidLoad method you write this line

itemName.text = stringName

On alloc:

secondViewConroller *secondView = [[secondViewConroller alloc]init];
secondView.stringName = @"Set this text";

answered Feb 13 '13 at 08:02

Waseem Shah

2,219
23
23

as i said in my question, method viewDidLoad launches when app is started – Vlad Z. Feb 13 '13 at 08:40
Sorry, I don't really understand the question. – Vlad Z. Feb 13 '13 at 10:42
What if he wants to edit property of existing viewController? I would suggest create protocol with delegate method. – pbibergal Feb 13 '13 at 15:36

score 0 · Answer 3 · answered Feb 13 '13 at 15:16

0

guess there is something wrong with your itemName variable if it appears to get to the nslog. did you create a referencing outlet in the interface builder for the textfield? otherwise you can get the right textfield by tag, in IB put for instance tag 1 on the textfield and do in code:

UITextField *tf=(UITextField*)[self.view viewWithTag:1];
tf.text=name;

(replace self.view for the view holding the textfield, if not directly in the main view)

answered Feb 13 '13 at 15:16

karel

63
5

text field is working if i'm changing it in second class (where it's created). The problem is with changing it from first class – Vlad Z. Feb 13 '13 at 15:23
btw, you now have a typo in your question: SetName and SetItemName, one or the other, but not both ;-) – karel Feb 13 '13 at 17:18

score 0 · Accepted Answer · answered Feb 17 '13 at 17:29

So i found a solution: There's was something wrong with calling method SetName: with parameters that i getting from first UIViewController.

Basically the solution is : create NSObject and put in there value from first UIViewConroller and then use it in second.

This TUTORIAL helped me to resolve the problem.

set UITextField.text from another class

4 Answers4

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