Ronaldo Bahia <ronaldo@jobconvo.com> writes:

I'm learning objective c and need help to understand delegate.

I have a UITextField in the FirstViewController and I want to show the
text inputed in the SecondViewController.

But it's not working. What am I doing wrong?

Here is the thread:

http://stackoverflow.com/questions/32513570/objective-c-text-field-with-delegate-not-working

It would be easier if you copy-pasted the text here, along with the
sources.


--
__Pascal Bourguignon__ http://www.informatimago.com/
“The factory of the future will have only two employees, a man and a
dog. The man will be there to feed the dog. The dog will be there to
keep the man from touching the equipment.” -- Carl Bass CEO Autodesk

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I'm learning objective c and need help to understand delegate.

I have a UITextField in the FirstViewController and I want to show the text inputed in the SecondViewController.

But it's not working. What am I doing wrong?

Here is the thread:

http://stackoverflow.com/questions/32513570/objective-c-text-field-with-delegate-not-working


Thanks in advance
Ronaldo

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Ronaldo Bahia <ronaldo@jobconvo.com> writes:

Em quinta-feira, 10 de setembro de 2015 23:07:37 UTC-3, Pascal J. Bourguignon escreveu:

Ronaldo Bahia <ronaldo@jobconvo.com> writes:

I'm learning objective c and need help to understand delegate.

I have a UITextField in the FirstViewController and I want to show the
text inputed in the SecondViewController.

But it's not working. What am I doing wrong?

viewDidLoad is not called by alloc or init. It's called when you load
the view from a Nib file.
In your case, it's never called.

You should explicitely call a method of your SecondViewController to
give it the text to display. In this case, you don't need a delegate.

in SecondViewController:

-(void)setText:(id)newText {
self.candidateLabel.text=newText;
}

and in FirstViewController:

secondViewController = [[SecondViewController alloc] init];
[secondViewController setText:getCodeString];

--
__Pascal Bourguignon__ http://www.informatimago.com/
“The factory of the future will have only two employees, a man and a
dog. The man will be there to feed the dog. The dog will be there to
keep the man from touching the equipment.” -- Carl Bass CEO Autodesk

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Here is my code:

FirstViewController.h

#import <UIKit/UIKit.h>

@interface FirstViewController : UIViewController

@property (weak, nonatomic) IBOutlet UIButton *accessButton;
@property (weak, nonatomic) IBOutlet UITextField *codeField;
@property (nonatomic, retain) NSString *getCodeString;

@end
SecondViewController.h

#import <UIKit/UIKit.h>

@class CodeField;

@protocol CodeFieldHandlerDelegate <NSObject>

@property NSString *saveCodeString;

@end

@interface SecondViewController : UIViewController

@property (weak, nonatomic) IBOutlet UILabel *candidateLabel;

@property (weak, nonatomic) id <CodeFieldHandlerDelegate> myDelegate;

@end
FirstViewController.m

#import "FirstViewController.h"
#import "SecondViewController.h"

@interface FirstViewController ()

<CodeFieldHandlerDelegate>

@property (nonatomic, strong) SecondViewController *secondViewController;

@end

@implementation FirstViewController

@synthesize getCodeString;
@synthesize secondViewController;
@synthesize saveCodeString;

- (void)viewDidLoad {
[super viewDidLoad];
}

- (IBAction)accessButton:(UIButton *)sender {

//get the input data from text field and store into string
getCodeString = self.codeField.text;

//go keypad back when button clicked from textfield
[self.codeField resignFirstResponder];

secondViewController = [[SecondViewController alloc] init];
secondViewController.myDelegate = self;

[self.navigationController pushViewController:secondViewController animated:YES];

}

// name of this string is the same of the NSString in the delegate
- (NSString *) saveCodeString {
return getCodeString;
}

@end
And SecondViewController.m

#import "SecondViewController.h"

@interface SecondViewController ()

@end

@implementation SecondViewController

@synthesize candidateLabel;
@synthesize myDelegate;

- (void)viewDidLoad {
[super viewDidLoad];

self.candidateLabel.text = [myDelegate saveCodeString];
}

@end



Em quinta-feira, 10 de setembro de 2015 23:07:37 UTC-3, Pascal J. Bourguignon escreveu:

Ronaldo Bahia <ronaldo@jobconvo.com> writes:

I'm learning objective c and need help to understand delegate.

I have a UITextField in the FirstViewController and I want to show the
text inputed in the SecondViewController.

But it's not working. What am I doing wrong?

Here is the thread:

http://stackoverflow.com/questions/32513570/objective-c-text-field-with-delegate-not-working

It would be easier if you copy-pasted the text here, along with the
sources.

--
__Pascal Bourguignon__ http://www.informatimago.com/
"The factory of the future will have only two employees, a man and a
dog. The man will be there to feed the dog. The dog will be there to
keep the man from touching the equipment." -- Carl Bass CEO Autodesk

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* Origin: fsxNet Usenet Gateway (21:1/5)

Thanks a lot.

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