在應用內設置中再次播放iOS應用內教程當用戶選擇「再次播放教程」

Question

我創建了一個簡單的iPhone應用程序，該應用程序在用戶下載應用程序時有一個教程（一系列5張圖像）第一次他們可以點擊下一步並循環顯示圖像。目前無法再次播放教程，但在我的更新中，我想介紹此功能，有些應用程序在其應用程序本身的設置中。

我有一個Tab Bar三個table view controllersTimeline，Event和Settings。當用戶進入到Settingstab並選擇「Play Tutorial Again" Table View Cell,我想，要再次啓動教程

在我Timeline視圖（根視圖），我有以下代碼：

- (void)viewDidAppear:(BOOL)animated 
{ 
    [super viewDidAppear:animated];   
    if ([TutorialViewController hasSeenTutorial] == NO) { 
    NSArray *tutorialImages = @[[UIImage imageNamed:@"Tutorial 1.png"], 
             [UIImage imageNamed:@"Tutorial 2.png"], 
             [UIImage imageNamed:@"Tutorial 3.png"], 
             [UIImage imageNamed:@"Tutorial 4.png"], 
             [UIImage imageNamed:@"Tutorial 5.png"]]; 
    TutorialViewController *tutorial = [[TutorialViewController alloc] initWithImages:tutorialImages]; 
    [self presentViewController:tutorial animated:YES completion:nil]; 
    [TutorialViewController setHasSeenTutorial:YES]; 
     } 
} 

- (void)displayTutorial 
{ 

    NSArray *tutorialImages = @[[UIImage imageNamed:@"Tutorial 1.png"], 
           [UIImage imageNamed:@"Tutorial 2.png"], 
           [UIImage imageNamed:@"Tutorial 3.png"], 
           [UIImage imageNamed:@"Tutorial 4.png"], 
           [UIImage imageNamed:@"Tutorial 5.png"]]; 

    TutorialViewController *tutorial = [[TutorialViewController alloc] initWithImages:tutorialImages]; 
    [self presentViewController:tutorial animated:YES completion:nil]; 
} 

的TutorialViewController的代碼是：

static NSString * const kHasSeenTutorial = @"hasSeenTutorial"; 

+ (BOOL)hasSeenTutorial 
{ 
    return [[NSUserDefaults standardUserDefaults] boolForKey:kHasSeenTutorial]; 
} 

+ (void)setHasSeenTutorial:(BOOL)hasSeenTutorial 
{ 
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; 
    [defaults setBool:hasSeenTutorial forKey:kHasSeenTutorial]; 
    [defaults synchronize]; 
} 

- (id)initWithImages:(NSArray *)imageArray 
{ 
    self = [super init]; 
    if (self) { 
     if (imageArray == nil) { 
      [[NSException exceptionWithName:NSInvalidArgumentException reason:@"imageArray cannot be nil." userInfo:nil] raise]; 
     } 
     self.images = imageArray; 
    } 
    return self; 
} 

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

- (void)viewDidLoad 
{ 

    [super viewDidLoad]; 

    UIImageView *imageView = [[UIImageView alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; 
    [self.view addSubview:imageView]; 
    self.imageView = imageView; 

    CGRect buttonFrame = [[UIScreen mainScreen] bounds]; 

     buttonFrame.origin.y = 519.0; 
     buttonFrame.origin.x = 250.0; 
     buttonFrame.size.height = 51.0; 
     buttonFrame.size.width = 70.0; 

     UIButton *nextButton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 

     [nextButton setTitle:@"Next" forState:UIControlStateNormal]; 
     [nextButton addTarget:self action:@selector(nextButtonWasTapped:) forControlEvents:UIControlEventTouchUpInside]; 

     nextButton.frame = buttonFrame; 
     nextButton.backgroundColor = [UIColor whiteColor]; 

     nextButton.showsTouchWhenHighlighted = YES; 
     nextButton.adjustsImageWhenHighlighted = NO; 
     nextButton.tintColor = [UIColor purpleColor]; 
     nextButton.titleLabel.font = [UIFont systemFontOfSize:18.0]; 
     nextButton.opaque = NO; 

     [self.view addSubview:nextButton]; 
     self.nextButton = nextButton; 

     // ---------------------------------------------------------------------- 

     currentIndex = 0; 

     if (self.images == nil) { 
      self.images = @[]; 
     } 


} 

- (void)viewDidAppear:(BOOL)animated 
{ 
    [super viewDidAppear:animated]; 
    [self resetToStart]; 
} 

- (void)setImages:(NSArray *)images 
{ 
    _images = images; 
    [self resetToStart]; 
} 

- (void)resetToStart 
{ 
    [self.nextButton setTitle:@"Next" forState:UIControlStateNormal]; 
    currentIndex = 0; 
    if (currentIndex < self.images.count) { 
     self.imageView.image = self.images[currentIndex]; 
    } 

    [self.view bringSubviewToFront:self.nextButton]; 
} 

- (void)nextButtonWasTapped:(id)sender 
{ 
    currentIndex++; 
    if (currentIndex < self.images.count) { 
     self.imageView.image = self.images[currentIndex]; 

     if (currentIndex == self.images.count - 1) { 
      [self.nextButton setTitle:@"Start" forState:UIControlStateNormal]; 
     } 
    } 

    if (currentIndex == self.images.count) { 
     [self dismissViewControllerAnimated:YES completion:nil]; 
     [EnvylopeTutorialViewController setHasSeenTutorial:YES]; 
    } 
} 

從外觀上來看，我猜，我只想做一些像電話ResetToStart，或類似的東西，但我真的不知道我會怎麼做。圖像是在時間軸上傳達的，但我正在從設置中播放教程，所以我猜測我將不得不在設置表格視圖中設置一些類似的方法等。我真的迷失在這一個上

所以從設置選項卡，我希望能夠通過點擊「播放教程」表格視圖單元重新播放相同的圖像，按鈕等教程。

在應用設置視圖控制器，我有：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath]; 
    if ([cell.textLabel.text isEqualToString:@"Play Tutorial Again"]) 
    { 
     NSLog(@"The Tutorial is going to play"); 
     [self displayTutorial]; 
    } 


} 

但displayTutorial方法不會被調用。

對此的任何指導將非常感激。

Answer 1

只需調用您Tutorial代碼中設置didSelectRow看來，你settingsViewController省略hasSeenTutorial代碼

將TutorialViewController *tutorial = [[TutorialViewController alloc] initWithImages:tutorialImages];在didSelectRow方法隨時