Question

这可能是一个非常简单的解决办法;我一直在阅读无数的论坛和教程，似乎无法找到答案。

在我的应用程序中，我有一个弹出窗口集合视图，用于选择特定选项并返回值...

但它不会突出显示或选择？我可以看到NS日志输出从不显示选择或数据空间。

这是我的代码......

collection.h文件

@interface collection : UICollectionViewController <UICollectionViewDataSource,     UICollectionViewDelegate>

@property (nonatomic, retain) NSArray  *counterImages;
@property (nonatomic, retain) NSArray  *descriptions;
@property (nonatomic, weak)   UILabel *graniteselect;
@property (nonatomic, retain) UIPopoverController* _collectionPopOver;
@property (nonatomic) BOOL clearsSelectionOnViewWillAppear; // defaults to YES, and if    YES, any selection is cleared in viewWillAppear:
@property (nonatomic) BOOL allowsSelection;

@end


implementation file:



#pragma mark UICollectionViewDataSource

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

-(NSInteger)collectionView:(UICollectionView *)collectionView
numberOfItemsInSection:(NSInteger)section
{
return _descriptions.count;

}

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView
             cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
MyCell *myCell = [collectionView
                                dequeueReusableCellWithReuseIdentifier:@"MyCell"
                                forIndexPath:indexPath];

UIImage *image;
int row = [indexPath row];

image = [UIImage imageNamed:_counterImages[row]];

myCell.imageView.image = image;

myCell.celltext.text= [_descriptions objectAtIndex:row];

return myCell;

}

- (void)collectionView:(UICollectionView *)collectionView performAction:(SEL)action        forItemAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender
{
_graniteselect.text = [_descriptions objectAtIndex:row];
 [self._collectionPopOver dismissPopoverAnimated:YES];

NSLog(@"Setting Value for Granite Select");

}

- (void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:    (NSIndexPath *)indexPath {
// TODO: Deselect item
}



-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
RoleDetailTVC *destination =
[segue destinationViewController];

destination.graniteselect = _graniteselect;

NSLog(@"Passing Data to RoleDetailTVC");

}
@end

Answer 1

这里有很多问题。首先，我认为你混淆了委托方法进行选择。 collectionView:performAction:forItemAtIndexPath:withSender:方法仅适用于特殊菜单弹出窗口，与选择单元格本身无关。您需要在代理中实现的是：

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
    NSLog(@"Selected cell at index path %@", indexPath);
}

现在您只是实施取消选择回调。

除此之外，还要确保UICollectionViewCell中的图片视图已启用触摸，否则您可能会阻止触摸事件到达单元格，并且它不会触发任何委托调用。我希望有所帮助！

集合视图单元格将不允许我选择

1 个答案: