UIScrollView中的應用程序崩潰，索引超出範圍

Question

在我的iPhone應用程序中，我使用github上的FGallery顯示照片庫。 我的問題是有時當我多次點擊圖片庫中的圖片（我認爲它主要針對第一張圖片）時，我的應用程序崩潰並顯示以下錯誤消息。

*終止應用程序由於未捕獲的異常 'NSRangeException'，原因： '* - [__ NSArrayM objectAtIndex：]：索引4294967295超出 範圍[0..1]'

我的代碼將數組傳遞給FGallery類就在這裏。

在.H

@interface ProdDetails : UIViewController<FGalleryViewControllerDelegate> { 
    NSMutableArray *networkImages; 
    FGalleryViewController *networkGallery; 
} 
@property(strong,nonatomic) NSMutableArray *networkImages; 
@property(strong,nonatomic) FGalleryViewController *networkGallery; 
-(void)setNetworkImages; 

在.M

-(void)setNetworkImages { 

    self.networkImages = [[NSMutableArray alloc]init]; 
    NSArray *data = [prodDet objectForKey:@"model_details"]; 
    for (id eachDic in data) { 

     NSString *eachUrl = [NSString stringWithFormat:@"%@%@",IMG_INIT_URL,[eachDic objectForKey:@"model_imgurl"]]; 
     eachUrl = [common replaceStringWhiteSpaceinUrl:eachUrl]; 
     [self.networkImages addObject:eachUrl]; 
    } 
} 
-(void)showProductImageGallery { 
    networkGallery = [[FGalleryViewController alloc]initWithPhotoSource:self]; 

    CATransition *transition = [CATransition animation]; 
    transition.duration = 1.0; 
    transition.type = kCATransitionFade; 
    transition.subtype = kCATransitionFromTop; 

    [self.navigationController.view.layer addAnimation:transition forKey:kCATransition]; 

    [self.navigationController pushViewController:networkGallery animated:NO]; 
} 

請人幫我解決這個問題。

編輯

感謝所有。最後我發現了這個問題。問題出在FGallery。

- (void)scrollingHasEnded { 

    _isScrolling = NO; 

    NSUInteger newIndex = fabs(floor(_scroller.contentOffset.x/_scroller.frame.size.width)); 
    //NSLog(@"%f,%f,%i",_scroller.contentOffset.x,_scroller.frame.size.width,newIndex); 
    // don't proceed if the user has been scrolling, but didn't really go anywhere. 
    if(newIndex == _currentIndex) 
     return; 

    // clear previous 
    [self unloadFullsizeImageWithIndex:_currentIndex]; 

    _currentIndex = newIndex; 
    [self updateTitle]; 
    [self updateButtons]; 
    [self loadFullsizeImageWithIndex:_currentIndex]; 
    [self preloadThumbnailImages]; 
} 

當我們將第一張圖片滾動到前一張時，_scroller.contentOffset.x變爲負值。 所以floor(_scroller.contentOffset.x/_scroller.frame.size.width)結果爲負指數。 我只是說晶圓廠作用導致正折射率

Answer 1

錯誤描述說，it because you (or FGallery) trying to access object from networkImages array from the index which is not exist (out of bound)!，與此代碼，我們不能幫你準確--- 其不夠！如果您找不到FGallery的任何解決方案，您應該照顧MWPhotoBrowser。它很容易使用，我發現。

Answer 2

使用此行代碼

NSMutableArray *data = [prodDet objectForKey:@"model_details"]; 

代替

NSArray *data = [prodDet objectForKey:@"model_details"];