ペン先から作成したカスタムテーブルセルのクリックで画像を変更

Question

ペン先のファイルから作成されたカスタムセルがあるテーブルがあります。ユーザーがセルをクリックすると、セルは高さが拡大され、ドロップダウンがシミュレートされます。カスタムセルには、セルがクリックされていないときにdropDownイメージを持つimageViewがあります。しかし、セルをクリックすると、セルが開いていることを示すために、イメージを折りたたみイメージまたは矢印上のイメージに変更する必要があります。

セルが矢印から矢印に上向きに、またはその逆に展開されるときに画像を変更する際に問題が発生します。私はこれを達成するための支援をしたいと思います。ここで

は私のコードです：

ViewController.h

@interface ViewController : UIViewController <UITableViewDelegate, 

UITableViewDataSource> 
@property (weak, nonatomic) IBOutlet UITableView *tableView; 

@property(nonatomic, strong) NSArray *items; 
@property (nonatomic, assign) BOOL expandFlag; 
@property (nonatomic, assign) NSIndexPath* selectedIndex; 

ViewController.m

- (NSArray *) items 
{ 
    if (!_items) { 
     _items = [NSArray new]; 
    } 
    return _items; 
} 

- (void)viewDidLoad { 
    [super viewDidLoad]; 

    UINib *nib = [UINib nibWithNibName:@"CustomTableViewCell" bundle:nil]; 
    [self.tableView registerNib:nib forCellReuseIdentifier:@"cell"]; 

    _items = @[ 
         @{@"title":@"Simpson", @"short":@"Homer", @"long":@"Mr jhvjm,b;k t tyfy rctrc rtcf rvty rthvgh bb r5ertvyg hg r5 tyhg 6ruygj 8rutyj r6yiugg tygdtjhgfdt hg tvt gthgfgni7yjftgjhb ftgfh b yjh gtfjfyhh j jj j", @"image":@"There are many ways to create expandable cells in the table view. Few of them you can easily find on this blog or somewhere in Google. One of that is the official Apple “Date cell” demo code. However, most of that describing the little hard way by using operations directly on constraints."}, 
         @{@"title":@"Simpson", @"short":@"Marge", @"long":@"Mrs bjyvhm uikn o utv jb k", @"image":@"There are many ways to create expandable cells in the table view. Few of them you can easily find on this blog or somewhere in Google. One of that is the official Apple “Date cell” demo code. However, most of that describing the little hard way by using operations directly on constraints."}, 
         @{@"title":@"Simpson", @"short":@"Bart", @"long":@"Mr vubj cbjknuy iubyuvjh biubkj ", @"image":@"There are many ways to create expandable cells in the table view. Few of them you can easily find on this blog or somewhere in Google. One of that is the official Apple “Date cell” demo code. However, most of that describing the little hard way by using operations directly on constraints."}, 
         @{@"title":@"Simpson", @"short":@"Lisa", @"long":@"Miss jbjvjbbiuvu yuvhj uby ", @"image":@"There are many ways to create expandable cells in the table view. Few of them you can easily find on this blog or somewhere in Google. One of that is the official Apple “Date cell” demo code. However, most of that describing the little hard way by using operations directly on constraints."}, 
         @{@"title":@"Simpson", @"short":@"Maggie", @"long":@"Miss iubniyujh k iuuh ", @"image":@"There are many ways to create expandable cells in the table view. Few of them you can easily find on this blog or somewhere in Google. One of that is the official Apple “Date cell” demo code. However, most of that describing the little hard way by using operations directly on constraints."}, 
         @{@"title":@"Flanders", @"short":@"Ned", @"long":@"Mr hbuyvj iybkj nui uhc n", @"image":@"There are many ways to create expandable cells in the table view. Few of them you can easily find on this blog or somewhere in Google. One of that is the official Apple “Date cell” demo code. However, most of that describing the little hard way by using operations directly on constraints."} 
         ]; 
    // Do any additional setup after loading the view, typically from a nib. 
} 


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

-(void) didExpandCell{ 

    _expandFlag = !_expandFlag; 
    [self.tableView reloadRowsAtIndexPaths:@[_selectedIndex] withRowAnimation:UITableViewRowAnimationAutomatic]; 

} 

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{ 
    return self.items.count; 
} 

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{ 

    CustomTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath]; 
    NSDictionary *item = _items[indexPath.row]; 
    cell.titleImage.text = [item objectForKey:@"title"]; 
    cell.longLabel.text = [item objectForKey:@"long"]; 
    cell.shortLabel.text = [item objectForKey:@"image"]; 

    return cell; 
} 

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{ 

    _selectedIndex = indexPath; 
    [self didExpandCell]; 
} 

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{ 

    if (_expandFlag && _selectedIndex == indexPath) { 
     return 400; 
    } 
    return 200; 

} 

CustomeTableViewcell.h

@interface CustomTableViewCell : UITableViewCell 

@property (weak, nonatomic) IBOutlet UIImageView *thumbImage; 
@property (weak, nonatomic) IBOutlet UILabel *titleImage; 
@property (weak, nonatomic) IBOutlet UILabel *shortLabel; 
@property (weak, nonatomic) IBOutlet UILabel *longLabel; 
@property (weak, nonatomic) IBOutlet UIImageView *dropDownImage; 

CustomerTableViewCell.m

- (void)awakeFromNib { 
    [super awakeFromNib]; 
} 

- (void)setSelected:(BOOL)selected animated:(BOOL)animated { 
    [super setSelected:selected animated:animated]; 
} 

Answer 1

あなたがチェックし、cellForRowAtIndexPath方法でdropDownImageを変更する必要があります。何かがあなたのイメージ名を持つ

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{ 

    CustomTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath]; 
    NSDictionary *item = _items[indexPath.row]; 
    cell.titleImage.text = [item objectForKey:@"title"]; 
    cell.longLabel.text = [item objectForKey:@"long"]; 
    cell.shortLabel.text = [item objectForKey:@"image"]; 

    NSString *dropDownImageName = [indexPath isEqual:_selectedIndex] && _expandFlag ? @"ARROW_DOWN" : @"ARROW_UP"; 
    cell.dropDownImage.image = [UIImage imageNamed:dropDownImageName]; 

    return cell; 
} 

変更ARROW_UPとARROW_DOWN以下のコードが好きです。