尝试将页面添加到UIPageViewController

Question

这是我的SlidesViewController.m文件。我试图将一堆图像加载到UIPageViewController中，但我没有运气。除了底部的两个点之外，屏幕是黑色的。没有图像，并且据我所知，我无法在2个视图之间切换。

输出我从我NSLog线是

2012-11-13 20:25:10.535 [17680:c07] Slide show guid: ab7718c9-3495-4882-a1e3-71f39530963b 
2012-11-13 20:25:10.536 [17680:c07] Loading image: /Users/Me/Library/Application Support/iPhone Simulator/6.0/Applications/667EF28E-4E5F-4452-BF0E-336730C2D3FE/Documents/media/dh1.jpg 
2012-11-13 20:25:10.536 [17680:c07] Loading image: /Users/Me/Library/Application Support/iPhone Simulator/6.0/Applications/667EF28E-4E5F-4452-BF0E-336730C2D3FE/Documents/media/dh2.jpg 
2012-11-13 20:25:10.538 [17680:c07] presentationCountForPageViewController: 2 
2012-11-13 20:25:10.538 [17680:c07] presentationIndexForPageViewController: 0 

不是真的知道在哪里可以从这里走。

#import "SlidesViewController.h" 
#import "SQLiteManager.h" 

@interface SlidesViewController() 
@property (nonatomic, strong) NSMutableArray *imageViews; 
@end 

@implementation SlidesViewController 
@synthesize guid = _guid; 
@synthesize imageViews = _imageViews; 


- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    NSLog(@"Slide show guid: %@", self.guid); 

    self.dataSource = self; 

    // Get the system paths 
    NSArray *dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *docsDir = [dirPaths objectAtIndex:0]; 
    NSString *mediaDir = [docsDir stringByAppendingPathComponent:@"media"]; 

    // Grab the images from the database 
    SQLiteManager *db = [[SQLiteManager alloc] initWithDatabaseNamed:@"local.db"]; 
    [db openDatabase]; 
    NSString *sql = [NSString stringWithFormat:@"select * from pictures where point='%@' order by rank", self.guid]; 
    NSArray *pictures = [db getRowsForQuery:sql]; 

    // Create the views 
    self.imageViews = [[NSMutableArray alloc] initWithCapacity:[pictures count]]; 
    for (NSDictionary *picture in pictures) 
    { 
     NSString *filename = [mediaDir stringByAppendingPathComponent:[picture objectForKey:@"imagename"]]; 
     NSLog(@"Loading image: %@", filename); 
     UIImage *img = [[UIImage alloc] initWithContentsOfFile:filename]; 
     UIImageView *iv = [[UIImageView alloc] initWithImage:img]; 
     UIViewController *ivc = [[UIViewController alloc] init]; 
     ivc.view = iv; 
     [self.imageViews addObject:ivc]; 
    } 
} 



- (NSUInteger)indexOfViewController:(UIView *)view 
{ 
    return [self.imageViews indexOfObject:view]; 
} 

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController 
{ 
    NSLog(@"viewControllerBeforeViewController"); 
    int index = [self.imageViews indexOfObject:viewController] - 1; 
    if (index >= 0) 
     return [self.imageViews objectAtIndex:index]; 
    return nil;  
} 

- (UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerAfterViewController:(UIViewController *)viewController 
{ 
    NSLog(@"viewControllerAfterViewController"); 
    int index = [self.imageViews indexOfObject:viewController] + 1; 
    if (index < [self.imageViews count]) 
     return [self.imageViews objectAtIndex:index]; 
    return nil; 
} 

- (NSInteger)presentationIndexForPageViewController:(UIPageViewController *)pageViewController 
{ 
    NSLog(@"presentationIndexForPageViewController: %d", 0); 
    return 0; 
} 

- (NSInteger)presentationCountForPageViewController:(UIPageViewController *)pageViewController 
{ 
    NSLog(@"presentationCountForPageViewController: %d", [self.imageViews count]); 
    return [self.imageViews count]; 
} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

-(BOOL) gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer { 

    if (index==0) { 

     if ([(UIPanGestureRecognizer*)gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]] && 
      [(UIPanGestureRecognizer*)gestureRecognizer velocityInView:gestureRecognizer.view].x > 0.0f) { 
      NSLog(@"DENIED SWIPE PREVIOUS ON FIRST PAGE"); 
      return NO; 
     } 
     if ([(UITapGestureRecognizer*)gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]] && 
      [(UITapGestureRecognizer*)gestureRecognizer locationInView:gestureRecognizer.view].x < self.view.frame.size.width/2) { 
      NSLog(@"DENIED TAP PREVIOUS ON FIRST PAGE"); 
      return NO; 
     } 
    } 

    return YES; 
} 
@end 

Answer 1

在.H

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer 
{ 
    if (index==0) { 
     if ([(UIPanGestureRecognizer*)gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]] && 
      [(UIPanGestureRecognizer*)gestureRecognizer velocityInView:gestureRecognizer.view].x > 0.0f) { 
      NSLog(@"DENIED SWIPE PREVIOUS ON FIRST PAGE"); 
      return NO; 
     } 
     if ([(UITapGestureRecognizer*)gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]] && 
      [(UITapGestureRecognizer*)gestureRecognizer locationInView:gestureRecognizer.view].x < self.view.frame.size.width/2) { 
      NSLog(@"DENIED TAP PREVIOUS ON FIRST PAGE"); 
      return NO; 
     } 
    } 
    return YES; 
}