iOS6 - Seque btw 2 View Controllers

iOS6 使用 Segue 傳輸兩個View Controller 之間的字串資料

Storyboard的設定：

在Scene1 的 TextField 輸入字串 "I love you." 按下按鈕，資料將傳到 Scene 2 的 TextField. 如下圖：

                                             

 然後在Scene2編輯後再回傳資料到Scene1,如下：

    

  

分別為這兩個ViewControllers建立兩個Classes,如下：

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SceneOneViewController.h: 

#import <UIKit/UIKit.h>

@interface SceneOneViewController : UIViewController

@property (strong, nonatomic) IBOutlet UITextField *SceneOneTextField;

@property (strong, nonatomic) NSString *textOne;

@end

___________________________________________
SceneOneViewController.m: 

#import "SceneOneViewController.h"

#import "SceneTwoViewController.h"

@interface SceneOneViewController ()

@end

@implementation SceneOneViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

}

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

//Pass data in scene one to text in scene 2

- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    

    SceneTwoViewController *destination = [segue destinationViewController];

    destination.text = _SceneOneTextField.text;

    

}

//Receive data from scene 2 and display in scene 1; the value of var "textOne" should be set in scene 2.m

- (IBAction)returned:(UIStoryboardSegue *)segue {

    _SceneOneTextField.text = _textOne;

}

@end

注意：在Storyboard的Scene2 Controller 裡，將按鈕連到下方綠色的小方格(Exit),選擇上述的 IBAction: returned。讓它離開Scene2回到Scene1時，要執行這個動作，如下：

________________________________________________
SceneTwoViewController.h: 

#import <UIKit/UIKit.h>

@interface SceneTwoViewController : UIViewController

@property (strong, nonatomic) IBOutlet UITextField *SceneTwoTextField;

@property (strong, nonatomic) NSString *text;

@end

________________________________________________
SceneTwoViewController.m: 

#import "SceneTwoViewController.h"

#import "SceneOneViewController.h"

@interface SceneTwoViewController ()

@end

@implementation SceneTwoViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil

{

    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];

    if (self) {

        // Custom initialization

    }

    return self;

}

- (void)viewDidLoad

{

    [super viewDidLoad];

_SceneTwoTextField.text = _text;

}

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

//Pass the data from scene 2 to textOne

- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    

    SceneOneViewController *destinationVC = [segue destinationViewController];

    destinationVC.textOne = _SceneTwoTextField.text;

    

}

@end