切换单元格大小按钮不更改单元格标识符 UIViewController

Question

我已经在我的按钮中创建了一些代码来在我的 cell identifier 之间切换，它做得很好但显然我需要设置和初始单元格标识符是小图标，所以我该怎么做单击该按钮后，删除该单元格标识符并用另一个替换它。我现在的代码如下：

GroupsViewController.m

#import "GroupsViewController.h"
#import "CustomCell.h"

@interface GroupsViewController ()
{
    NSArray *arrayOfImages;
    NSArray *arrayOfDescriptions;
}

@end

@implementation GroupsViewController
{
    NSString *reuseIdentifier;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    [[self GroupsCollectionView]setDataSource:self];
    [[self GroupsCollectionView]setDelegate:self];
    reuseIdentifier= @"SmallIcon";


    arrayOfImages = [[NSArray alloc]initWithObjects:@"?.png", nil];

    arrayOfDescriptions = [[NSArray alloc]initWithObjects:@"?", nil];

}

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

-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
    return [arrayOfDescriptions count];
}

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{


    CustomCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];

    [[cell IconImage]setImage:[UIImage imageNamed:[arrayOfImages objectAtIndex:indexPath.item]]];
    [[cell IconLabel]setText:[arrayOfDescriptions objectAtIndex:indexPath.item]];

    return cell;
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    //Dispose of any resources that can be recreated.
}

- (IBAction)cellToggleAction:(id)sender {

    if([reuseIdentifier isEqualToString:@"SmallIcon"])
            reuseIdentifier=@"ListView";
    else if
        ([reuseIdentifier isEqualToString:@"ListView"])
            reuseIdentifier=@"LargeIcon";
    else if
        ([reuseIdentifier isEqualToString:@"LargeIcon"])
            reuseIdentifier=@"SmallIcon";

    [self.GroupsCollectionView reloadData];
    }

@end

CustomCell.h

#import <UIKit/UIKit.h>

@interface CustomCell : UICollectionViewCell

@property (weak, nonatomic) IBOutlet UIImageView *IconImage;

@property (weak, nonatomic) IBOutlet UILabel *IconLabel;

@end

我认为这与我在 reuseIdentifier 中设置有关 - (void)viewDidLoad 所以我没有得到任何错误，所以我没有设置错误，所以我真正要求的是一种设置初始 reuseidzntifier 的方法，当我在按钮之间切换时将其替换为以下内容点击次数。

此外，如果有人能指出正确的方向，将图标图像添加到每次单击按钮，这将很有帮助。

问题发生在我单击下图所示的按钮时，单元格本身发生了变化，但初始单元格标识符保持不变。

Answer 1

据我了解，您的 UICollectionViewCell 工作正常。您只需要在切换单元格时调整它们的大小。

- (CGSize)collectionView:(UICollectionView *)collectionView
                          layout:(UICollectionViewLayout *)collectionViewLayout
          sizeForItemAtIndexPath:(NSIndexPath *)indexPath {

     CGSize cellSize;

     // Return required size based on your identifiers
    if([reuseIdentifier isEqualToString:@"SmallIcon"])
            cellSize = CGSizeMake(50, 50); // Sample size
    else if
        ([reuseIdentifier isEqualToString:@"ListView"])
            cellSize = CGSizeMake(80, 80); // Sample size
    else if
        ([reuseIdentifier isEqualToString:@"LargeIcon"])
            cellSize = CGSizeMake(120, 120); // Sample size

    return cellSize;
}

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