QLPreviewController - 显示问题

Question

代码段

   NSMutableArray *samplepdf = [[NSMutableArray alloc]initWithObjects:@"sam1.pdf",@"sam2.pdf",@"sam3.pdf",@"sam4.pdf", nil];


  1)  QLPreviewController *previewController = [[QLPreviewController alloc] init];
    previewController.dataSource = self;
    previewController.currentPreviewItemIndex = [indexPath row];
    [self presentModalViewController:previewController animated:YES];


2) 


- (NSInteger)numberOfPreviewItemsInPreviewController:(QLPreviewController *)previewController
{

    return [samplepdf count];

}


// returns the item that the preview controller should preview
- (id)previewController:(QLPreviewController *)previewController previewItemAtIndex:(NSInteger)index
{   

    NSString *documentsDirectoryPath = [[NSBundle mainBundle]resourcePath]; 

    NSString *dataPath =[documentsDirectoryPath stringByAppendingPathComponent:[samplepdf objectAtIndex:index]];


    NSURL *url = [NSURL fileURLWithPath:dataPath isDirectory:YES];  
    return url; 
}

此代码在iOS5中完美运行，但是当我在ios6中运行时，可以看到一些空间。

我该如何解决这个问题？

提前致谢：）

Answer 1

在iOS6中不推荐调用presentModalViewController：animated：。您可能希望在调用presentViewController：animated：之前指定模态转换样式和模式表示样式。你可以尝试这样的事情：

  [previewController setModalPresentationStyle:UIModalPresentationFullScreen];
  [previewController setModalTransitionStyle:UIModalTransitionStyleFlipHorizontal];

  [self presentViewController:previewController animated:YES completion:nil];