UITableViewCell Verlinkung zu einer bestimmten Seite in PageViewController

Question

Ich bin ziemlich neu in der iOS-Programmierung und habe ein Problem, das ich selbst nicht lösen konnte.

Der Hauptteil meiner App ist eine Liste von Tieren (AnimalTableViewController), die durchsuchbar ist (diese Funktion funktioniert). Nachdem Sie auf eine bestimmte Zelle geklickt haben, sollten Sie ein Bild eines Tieres sehen können. Alle Tierbilder werden im PagerViewController (CustomPagerViewController) kompiliert.

image of my storyboards can be found here http://i50.tinypic.com/ve14r4.jpg

Was muss ich tun, ist eine dynamische Tabellenzelle auf eine bestimmte Ansicht/Storyboard zu verbinden. Ich konnte schon vorher eine Zelle mit einem Bild verbinden - das Array von Bildern wurde in einem einzigen View-Controller angezeigt. Ich habe es dieses Mal über PagerViewController gemacht, weil ich die Swipe-Funktion benötigte (Swipe-bezogene Methoden befinden sich im PagerViewController.m und alle funktionieren wie erwartet).

Bitte helfen Sie mir dabei, ich habe keine Anleitungen oder Ratschläge gefunden, wie Daten zwischen UITableView und PagerViewController übertragen werden können.

AnimalTableViewController.m

@implementation AnimalTableViewController 

@synthesize allTableData; 
@synthesize filteredTableData; 
@synthesize searchBar; 
@synthesize isFiltered; 
@synthesize tableView; 

- (id)initWithStyle:(UITableViewStyle)style 
{ 
    self = [super init]; 
    if (self) { 
     // Custom initialization 
    } 
    return self; 
} 

- (void)didReceiveMemoryWarning 
{ 
    // Releases the view if it doesn't have a superview. 
    [super didReceiveMemoryWarning]; 
} 

#pragma mark - View lifecycle 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 

    tableView.delegate = (id)self; 
    tableView.dataSource = (id)self; 

    searchBar.delegate = (id)self; 

    allTableData = [[NSMutableArray alloc] initWithObjects: 
        [[Animal alloc] initWithName:@"Aardvark" andDescription:@"Aardvark"], 
        [[Animal alloc] initWithName:@"Alligator" andDescription:@"Alligator"], 
        [[Animal alloc] initWithName:@"Alpaca" andDescription:@"Alpaca"], 
        [[Animal alloc] initWithName:@"Ant" andDescription:@"Ant"], 
        [[Animal alloc] initWithName:@"Anteater" andDescription:@"Anteater"], 
        [[Animal alloc] initWithName:@"Armadillo" andDescription:@"Armadillo"], 
        [[Animal alloc] initWithName:@"Baboon" andDescription:@"Baboon"], 
        [[Animal alloc] initWithName:@"Badger" andDescription:@"Badger"], 
        [[Animal alloc] initWithName:@"Bat" andDescription:@"Bat"], 
        [[Animal alloc] initWithName:@"Bear" andDescription:@"Bear"], 
        [[Animal alloc] initWithName:@"Beaver" andDescription:@"Beaver"], 
        [[Animal alloc] initWithName:@"Bee" andDescription:@"Bee"], 
        [[Animal alloc] initWithName:@"Bison" andDescription:@"Bison"], 
        nil ]; 
} 

- (void)viewDidUnload 
{ 
    [self setSearchBar:nil]; 
    [super viewDidUnload]; 
} 

- (void)viewWillAppear:(BOOL)animated 
{ 
    [super viewWillAppear:animated]; 
} 

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

- (void)viewWillDisappear:(BOOL)animated 
{ 
    [super viewWillDisappear:animated]; 
} 

- (void)viewDidDisappear:(BOOL)animated 
{ 
    [super viewDidDisappear:animated]; 
} 

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    // Return YES for supported orientations 
    return (interfaceOrientation == UIInterfaceOrientationPortrait); 
} 

#pragma mark - Table view data source 

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView 
{ 
    return 1; 
} 

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 
{ 
    int rowCount; 
    if(self.isFiltered) 
     rowCount = filteredTableData.count; 
    else 
     rowCount = allTableData.count; 

    return rowCount; 
} 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    static NSString *CellIdentifier = @"Cell"; 

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
    if (cell == nil) 
     cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier]; 

    Animal* animal; 
    if(isFiltered) 
     animal = [filteredTableData objectAtIndex:indexPath.row]; 
    else 
     animal = [allTableData objectAtIndex:indexPath.row]; 

    cell.textLabel.text = animal.name; 
// cell.detailTextLabel.text = animal.description; 

    return cell; 
} 

#pragma mark - Table view delegate 

-(void)searchBar:(UISearchBar*)searchBar textDidChange:(NSString*)text 
{ 
    if(text.length == 0) 
    { 
     isFiltered = FALSE; 
    } 
    else 
    { 
     isFiltered = true; 
     filteredTableData = [[NSMutableArray alloc] init]; 

     for (Animal* animal in allTableData) 
     { 
      NSRange nameRange = [animal.name rangeOfString:text options:NSCaseInsensitiveSearch]; 
      NSRange descriptionRange = [animal.description rangeOfString:text options:NSCaseInsensitiveSearch]; 
      if(nameRange.location != NSNotFound || descriptionRange.location != NSNotFound) 
      { 
       [filteredTableData addObject:animal]; 
      } 
     } 
    } 

    [self.tableView reloadData]; 
} 

@end 

CustomPagerViewController.m

@interface CustomPagerViewController() 

@end 

@implementation CustomPagerViewController 

- (void)viewDidLoad 
{ 
    // Do any additional setup after loading the view, typically from a nib. 
    [super viewDidLoad]; 

    [self addChildViewController:[self.storyboard instantiateViewControllerWithIdentifier:@"Aardvark"]]; 
    [self addChildViewController:[self.storyboard instantiateViewControllerWithIdentifier:@"Alligator"]]; 
    [self addChildViewController:[self.storyboard instantiateViewControllerWithIdentifier:@"Alpaca"]]; 
} 

@end 

PagerViewController.m

@interface PagerViewController() 
@property (assign) BOOL pageControlUsed; 
@property (assign) NSUInteger page; 
@property (assign) BOOL rotating; 
- (void)loadScrollViewWithPage:(int)page; 
@end 

@implementation PagerViewController 

@synthesize scrollView; 
@synthesize pageControl; 
@synthesize pageControlUsed = _pageControlUsed; 
@synthesize page = _page; 
@synthesize rotating = _rotating; 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
    [self.scrollView setPagingEnabled:YES]; 
    [self.scrollView setScrollEnabled:YES]; 
    [self.scrollView setShowsHorizontalScrollIndicator:NO]; 
    [self.scrollView setShowsVerticalScrollIndicator:NO]; 
    [self.scrollView setDelegate:self]; 
} 

- (BOOL)automaticallyForwardAppearanceAndRotationMethodsToChildViewControllers { 
    return NO; 
} 

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    return YES; 
} 

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration { 
    UIViewController *viewController = [self.childViewControllers objectAtIndex:self.pageControl.currentPage]; 
    [viewController willRotateToInterfaceOrientation:toInterfaceOrientation duration:duration]; 
    _rotating = YES; 
} 

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration { 

    UIViewController *viewController = [self.childViewControllers objectAtIndex:self.pageControl.currentPage]; 
    [viewController willAnimateRotationToInterfaceOrientation:toInterfaceOrientation duration:duration]; 

    self.scrollView.contentSize = CGSizeMake(scrollView.frame.size.width * [self.childViewControllers count], scrollView.frame.size.height); 
    NSUInteger page = 0; 
    for (viewController in self.childViewControllers) { 
     CGRect frame = self.scrollView.frame; 
     frame.origin.x = frame.size.width * page; 
     frame.origin.y = 0; 
     viewController.view.frame = frame; 
     page++; 
    } 

    CGRect frame = self.scrollView.frame; 
    frame.origin.x = frame.size.width * _page; 
    frame.origin.y = 0; 
    [self.scrollView scrollRectToVisible:frame animated:NO]; 

} 

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation { 
    _rotating = NO; 
    UIViewController *viewController = [self.childViewControllers objectAtIndex:self.pageControl.currentPage]; 
    [viewController didRotateFromInterfaceOrientation:fromInterfaceOrientation]; 
} 

- (void)viewWillAppear:(BOOL)animated { 
    [super viewWillAppear:animated]; 

    for (NSUInteger i =0; i < [self.childViewControllers count]; i++) { 
     [self loadScrollViewWithPage:i]; 
    } 

    self.pageControl.currentPage = 0; 
    _page = 0; 
    [self.pageControl setNumberOfPages:[self.childViewControllers count]]; 

    UIViewController *viewController = [self.childViewControllers objectAtIndex:self.pageControl.currentPage]; 
    if (viewController.view.superview != nil) { 
     [viewController viewWillAppear:animated]; 
    } 

    self.scrollView.contentSize = CGSizeMake(scrollView.frame.size.width * [self.childViewControllers count], scrollView.frame.size.height); 
} 

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

    if ([self.childViewControllers count]) { 
     UIViewController *viewController = [self.childViewControllers objectAtIndex:self.pageControl.currentPage]; 
     if (viewController.view.superview != nil) { 
      [viewController viewDidAppear:animated]; 
     } 
    } 
} 

- (void)viewWillDisappear:(BOOL)animated { 
    if ([self.childViewControllers count]) { 
     UIViewController *viewController = [self.childViewControllers objectAtIndex:self.pageControl.currentPage]; 
     if (viewController.view.superview != nil) { 
      [viewController viewWillDisappear:animated]; 
     } 
    } 
    [super viewWillDisappear:animated]; 
} 

- (void)viewDidDisappear:(BOOL)animated { 
    UIViewController *viewController = [self.childViewControllers objectAtIndex:self.pageControl.currentPage]; 
    if (viewController.view.superview != nil) { 
     [viewController viewDidDisappear:animated]; 
    } 
    [super viewDidDisappear:animated]; 
} 

- (void)loadScrollViewWithPage:(int)page { 
    if (page < 0) 
     return; 
    if (page >= [self.childViewControllers count]) 
     return; 

    // replace the placeholder if necessary 
    UIViewController *controller = [self.childViewControllers objectAtIndex:page]; 
    if (controller == nil) { 
     return; 
    } 

    // add the controller's view to the scroll view 
    if (controller.view.superview == nil) { 
     CGRect frame = self.scrollView.frame; 
     frame.origin.x = frame.size.width * page; 
     frame.origin.y = 0; 
     controller.view.frame = frame; 
     [self.scrollView addSubview:controller.view]; 
    } 
} 

- (void)previousPage { 
    if (_page - 1 > 0) { 

     // update the scroll view to the appropriate page 
     CGRect frame = self.scrollView.frame; 
     frame.origin.x = frame.size.width * (_page - 1); 
     frame.origin.y = 0; 

     UIViewController *oldViewController = [self.childViewControllers objectAtIndex:_page]; 
     UIViewController *newViewController = [self.childViewControllers objectAtIndex:_page - 1]; 
     [oldViewController viewWillDisappear:YES]; 
     [newViewController viewWillAppear:YES]; 

     [self.scrollView scrollRectToVisible:frame animated:YES]; 

     self.pageControl.currentPage = _page - 1; 
     // Set the boolean used when scrolls originate from the UIPageControl. See scrollViewDidScroll: above. 
     _pageControlUsed = YES; 
    } 
} 

- (void)nextPage { 
    if (_page + 1 > self.pageControl.numberOfPages) { 

     // update the scroll view to the appropriate page 
     CGRect frame = self.scrollView.frame; 
     frame.origin.x = frame.size.width * (_page + 1); 
     frame.origin.y = 0; 

     UIViewController *oldViewController = [self.childViewControllers objectAtIndex:_page]; 
     UIViewController *newViewController = [self.childViewControllers objectAtIndex:_page + 1]; 
     [oldViewController viewWillDisappear:YES]; 
     [newViewController viewWillAppear:YES]; 

     [self.scrollView scrollRectToVisible:frame animated:YES]; 

     self.pageControl.currentPage = _page + 1; 
     // Set the boolean used when scrolls originate from the UIPageControl. See scrollViewDidScroll: above. 
     _pageControlUsed = YES; 
    } 
} 

- (IBAction)changePage:(id)sender { 
    int page = ((UIPageControl *)sender).currentPage; 

    // update the scroll view to the appropriate page 
    CGRect frame = self.scrollView.frame; 
    frame.origin.x = frame.size.width * page; 
    frame.origin.y = 0; 

    UIViewController *oldViewController = [self.childViewControllers objectAtIndex:_page]; 
    UIViewController *newViewController = [self.childViewControllers objectAtIndex:self.pageControl.currentPage]; 
    [oldViewController viewWillDisappear:YES]; 
    [newViewController viewWillAppear:YES]; 

    [self.scrollView scrollRectToVisible:frame animated:YES]; 

    // Set the boolean used when scrolls originate from the UIPageControl. See scrollViewDidScroll: above. 
    _pageControlUsed = YES; 
} 

- (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView { 
    UIViewController *oldViewController = [self.childViewControllers objectAtIndex:_page]; 
    UIViewController *newViewController = [self.childViewControllers objectAtIndex:self.pageControl.currentPage]; 
    [oldViewController viewDidDisappear:YES]; 
    [newViewController viewDidAppear:YES]; 

    _page = self.pageControl.currentPage; 
} 

#pragma mark - 
#pragma mark UIScrollViewDelegate methods 

- (void)scrollViewDidScroll:(UIScrollView *)sender { 
    // We don't want a "feedback loop" between the UIPageControl and the scroll delegate in 
    // which a scroll event generated from the user hitting the page control triggers updates from 
    // the delegate method. We use a boolean to disable the delegate logic when the page control is used. 
    if (_pageControlUsed || _rotating) { 
     // do nothing - the scroll was initiated from the page control, not the user dragging 
     return; 
    } 

    // Switch the indicator when more than 50% of the previous/next page is visible 
    CGFloat pageWidth = self.scrollView.frame.size.width; 
    int page = floor((self.scrollView.contentOffset.x - pageWidth/2)/pageWidth) + 1; 
    if (self.pageControl.currentPage != page) { 
     UIViewController *oldViewController = [self.childViewControllers objectAtIndex:self.pageControl.currentPage]; 
     UIViewController *newViewController = [self.childViewControllers objectAtIndex:page]; 
     [oldViewController viewWillDisappear:YES]; 
     [newViewController viewWillAppear:YES]; 
     self.pageControl.currentPage = page; 
     [oldViewController viewDidDisappear:YES]; 
     [newViewController viewDidAppear:YES]; 
     _page = page; 
    } 
} 

// At the begin of scroll dragging, reset the boolean used when scrolls originate from the UIPageControl 
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView { 
    _pageControlUsed = NO; 
} 

// At the end of scroll animation, reset the boolean used when scrolls originate from the UIPageControl 
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView { 
    _pageControlUsed = NO; 
} 

@end 

Answer 1

erstellen Kennung für einen Übergang (die Linie zwischen zwei Ansichten im Interface Builder)

dann den folgenden Code zu AnimalTableViewController hinzufügen

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    Animal* animal; 
    if(isFiltered) 
     animal = [filteredTableData objectAtIndex:indexPath.row]; 
    else 
     animal = [allTableData objectAtIndex:indexPath.row]; 

    [self performSegueWithIdentifier:@"DetailSegue" sender:animal]; 
} 

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
{ 
    if ([[segue identifier] isEqualToString:@"DetailSegue"]) { 

     PagerViewController *detailVC = [segue destinationViewController]; 
     detailVC.currentAnimal = sender; 
    } 
} 

Dann in Ihrem PagerViewController. h create

@property (strong, nonatomic) Animal *currentAnimal; 

Jetzt können Sie das Tier in PagerViewController von self.currentAnimal

Answer 2

Sie müssen einen Übergang von Ihrem angeklickten UITableViewCell zum neuen viewController einrichten. Verwenden Sie die prepareForSegue Methode und übergeben Sie die UIImage (oder Array von Bildern) an den neuen ViewController. Sobald das Array Teil des neuen ViewControllers ist, können Sie das Array beliebig manipulieren.

1. Einen neuen Übergang von UITableViewCell zum viewController einrichten.
2. Legen Sie die Segmentkennung fest.
3. Senden Sie die ViewController das Bild (oder Array von Bildern in Ihrem Fall) basierend auf der UITableViewCell 's indexPath.