如何从UIViewController访问UICollectionViewCell的IBOutlet? [英] How to access IBOutlets of a UICollectionViewCell from a UIViewController?
问题描述
我在UIViewController内实现了UICollectionView.标题单元格是在单独的.xib文件中创建的,并通过IBOutlets和IBAction在单独的.h和.m文件中实现.其余单元在同一UIVIewController中实现(原因是因为我添加了此视差效果).
I implemented a UICollectionView inside a UIViewController. The header cell is created in a separate.xib file and it is implemented in a separate .h and .m files with the IBOutlets and IBActions. The rest of the cells are implemented in the same UIVIewController (The reason is because I added this Parallax effect).
我想从包含collectionview的viewcontroller(RankingViewController)修改标头单元(CSCellUser.h)中的IBoutlet(标签和按钮)的信息,我该怎么做?
I would like to modify the info of the IBoutlets (labels and buttons) that are in the header cell (CSCellUser.h) from the viewcontroller (RankingViewController) which containts the collectionview, how can I do this?
Cell:CSCellUser.h
Cell: CSCellUser.h
@interface CSCellUser : UICollectionViewCell
@property IBOutlet UILabel *myScoreValueLabel;
@property IBOutlet UILabel *myRankingValueLabel;
-(IBAction) sendButtonTouchHandler:(id) sender;
@end
UIViewController:RankingViewController.h
UIViewController: RankingViewController.h
@interface RankingViewController : CommonViewController <UICollectionViewDelegate, UICollectionViewDataSource> {
}
@property IBOutlet UICollectionView *collectionView1;
@end
UIViewController:RankingViewController.m
UIViewController:RankingViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
//Parallax Effect, UICollectionView
// Locate the layout
CSStickyHeaderFlowLayout *layout = (id)self.collectionView1.collectionViewLayout;
if ([layout isKindOfClass:[CSStickyHeaderFlowLayout class]]) {
layout.parallaxHeaderReferenceSize = CGSizeMake(320, 220);
layout.parallaxHeaderAlwaysOnTop = YES;
}
// Locate the nib and register it to your collection view
UINib *headerNib = [UINib nibWithNibName:@"CSHeaderRanking" bundle:nil];
[self.collectionView1 registerNib:headerNib
forSupplementaryViewOfKind:CSStickyHeaderParallaxHeader
withReuseIdentifier:@"TopViewCell"];
//get the position of the user and the ranking (this should update the IBOutlets in the CSCellUser.h)
[self getUserRanking];
//get the ranking of users (this updates each cell of the ranking in cellForItemAtIndexPath)
[self getRanking];
}
- (NSInteger) numberOfSectionsInCollectionView:
(UICollectionView *)collectionView
{
return 1;
}
- (NSInteger) collectionView:(UICollectionView *)collectionView
numberOfItemsInSection:(NSInteger)section
{
return [ranking count];
}
- (UICollectionViewCell *) collectionView:(UICollectionView *)collectionView
cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier: @"UsersCell" forIndexPath:indexPath];
if ([ranking count] > 0)
{
UserRanking *user = [ranking objectAtIndex:indexPath.row]; //Fill the cell
UILabel *usernameLabel = (UILabel *)[cell viewWithTag:101];
usernameLabel.text = user.username;
UILabel *scoreLabel = (UILabel *)[cell viewWithTag:102];
scoreLabel.text = [NSString stringWithFormat:@"%d", user.score];
UILabel *gamesLabel = (UILabel *)[cell viewWithTag:103];
gamesLabel.text =[NSString stringWithFormat:@"%d", user.tries];
}
return cell;
}
//Header
- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
{
UICollectionReusableView *reusableview = nil;
if ([kind isEqualToString:CSStickyHeaderParallaxHeader]) {
reusableview = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:@"TopViewCell" forIndexPath:indexPath];
}
return reusableview;
}
这是我尝试从cellForRowAtIndexPath更改标签之一,但它没有更改的方式.
This is how I am trying to change one of the labels from cellForRowAtIndexPath but it does not change.
CSHeaderRanking *topcell = [collectionView dequeueReusableCellWithReuseIdentifier: @"TopCell" forIndexPath:indexPath];
topcell.myScoreValueLabel.text = @"32";
推荐答案
如果TopCell映射在其xib中,那么您只需参考其属性即可.如果要自定义,则需要重写CCSticky ...,并在xib和此类中引用它.
If TopCell is mapped in its xib, all you have to do is refer to its properties. If you want to customize, you'll need to over-ride the CCSticky... and refer to it in your xib and this class.
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