#import <UIKit/UIKit.h> #import "DXWViewController1.h" @interface DXWViewController : UIViewController<DXWFlipsideViewControllerDelegate> - (IBAction)change:(id)sender; @property (retain, nonatomic) IBOutlet UILabel *label; @property (retain, nonatomic) IBOutlet UISwitch *switchButton;  - (IBAction)showInfo:(id)sender;  @end

DXWViewController.m:

#import "DXWViewController.h"  @interface DXWViewController ()  @end  @implementation DXWViewController  -(void)viewWillAppear:(BOOL)animated {     [self changeData]; }  -(void)changeData {     NSUserDefaults *usr = [NSUserDefaults standardUserDefaults];     NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:@YES,@"switch", nil];          [usr registerDefaults:dic];     ((UILabel *)self.label).text = [usr boolForKey:@"switch"]?@"開":@"關";     self.switchButton.on = [usr boolForKey:@"switch"];     //都要寫入一下     [usr synchronize]; }  - (void)viewDidLoad {     [super viewDidLoad]; 	UIApplication *app = [UIApplication sharedApplication];     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(changeData) name:UIApplicationWillEnterForegroundNotification object:app]; }   - (void)dealloc {     [self.switchButton release];     [_label release];     [super dealloc]; } //實現協議的方法 - (void)flipsideViewControllerDidFinish:(DXWViewController1 *)controller {     [self dismissViewControllerAnimated:YES completion:nil]; } - (IBAction)change:(id)sender {     UISwitch *switchButton = sender;     NSUserDefaults *user = [NSUserDefaults standardUserDefaults];     [user setBool:switchButton.on forKey:@"switch"];     [user synchronize];     ((UILabel *)self.label).text = [user boolForKey:@"switch"]?@"開":@"關"; } - (IBAction)showInfo:(id)sender {     UIStoryboard *strBoard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];     DXWViewController1 *controller = [strBoard instantiateViewControllerWithIdentifier:@"DXWViewController1"];     controller.delegate = self;     controller.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;     [self presentViewController:controller animated:YES completion:nil]; } @end

上圖中showInfo方法是通過代碼的方法實現跳轉到下一個view,如果是通過storyboard實現連線的方法然后跳過下一個view是這樣實現：

//連線的方法 -(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {     if ([segue.identifier isEqualToString:@"Add"]) {         DXWViewController1 *controlller = segue.destinationViewController;         controlller.delegate = self;     } }

6.修改DXWViewController1(子視圖)

#import <UIKit/UIKit.h> @class DXWViewController1;  @protocol DXWFlipsideViewControllerDelegate - (void)flipsideViewControllerDidFinish:(DXWViewController1 *)controller; @end @interface DXWViewController1 : UIViewController @property (assign, nonatomic) id <DXWFlipsideViewControllerDelegate> delegate; - (IBAction)done:(id)sender; @end

DXWViewController.m:

#import "DXWViewController1.h"  @interface DXWViewController1 ()  @end  @implementation DXWViewController1  - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];     if (self) {         // Custom initialization     }     return self; }  - (void)viewDidLoad {     [super viewDidLoad]; 	// Do any additional setup after loading the view. }  - (void)didReceiveMemoryWarning {     [super didReceiveMemoryWarning];     // Dispose of any resources that can be recreated. }  - (IBAction)done:(id)sender {     [self.delegate flipsideViewControllerDidFinish:self]; } @end