iOS：如何更改UICollectionViewCell的方向？

Question

I have a UICollectionViewController that I load when a user turns their iPad so as to put it into landscape orientation. The problem I'm having is that my UICollectionViewCell s are still loading as if it were in portrait orientation. I set the UICollectionViewController to landscape inside Interface Builder, and I'm using a custom cell class that I've called CollectionViewCell . Each cell contains just an image and a label.

Is there something that I should be doing either in Interface Builder or in my code? I tried using CGAffineTransformationMakeRotation , but that was no help. If anyone else has encountered this before, I would be extremely grateful! Thanks very much!

Here's a bit of the code for reference:

-(void)viewDidLoad
{
 self.collectionView.dataSource = self;
    self.collectionView.delegate = self;
}

- (NSInteger)collectionView:(UICollectionView *)view numberOfItemsInSection:(NSInteger)section
{
    return listArray.count;
}

- (NSInteger)numberOfSectionsInCollectionView: (UICollectionView *)collectionView
{
    return 1;
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{      
    CollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"devices" forIndexPath:indexPath];
   cell.statusImage.image=[UIImage imageNamed:@"Default.png"];
    cell.name.text=@"HEY !!!!!";
    return cell;
}


- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
    return CGSizeMake(320, 420);
}

- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section
{
    return UIEdgeInsetsMake(50, 20, 50, 20);

}

Answer 1

In case anyone else has had this problem, here is how I solved it.

I was initially not allowing autorotation, and instead was just registering for orientationChanged notifications using NSNotificationCenter . This worked great except that it was preventing my second view from realizing that it needed to load in landscape mode.

So instead of that, I've created a class for the tabBar that my main view is embedded in, and I return NO for the shouldAutoRotate method in that class and in every other view except for the one which I want to load in landscape mode. I'm still using the orientationChanged notifications in my main view'S controller, since it is embedded in the tabBar . But I'm just using autorotation when returning to the main view.

If anyone has any questions, let me know. Hope it helps!