ios - 无法使用 tableview cell.accessoryView 进行 Click 事件

Question

这个伟大的社区大家好。我只需要在 tableView 中实现一个简单的删除功能。我知道这可以使用滑动删除( TableView 委托(delegate))来实现。但客户需要这样的东西:

我使用 cell.accessoryView = trash_icon; 完成了这个设计。现在的要求是，

• 当我点击 tableView 单元格时。它必须显示的详细信息车辆。

• 如果我点击垃圾箱/垃圾桶图标，它必须删除该行。

  我已经使用 cellForRowAtIndexPath 为 Cells 成功导航到车辆详细信息。但坚持执行删除选项。问题是每当我点击垃圾桶图标时，它都会转到车辆详细信息页面。我看过以下内容link1 , link2 , link3等等，但我无法理解实现这一点的想法。我还通过将单元格指定为 cell.accessoryType = UITableViewCellAccessoryCheckmark、
  cell.accessoryType = UITableViewCellAccessoryDe​​tailDisclosureButton 尝试了 accessoryButtonTappedForRowWithIndexPath它可以工作，但问题是我无法更改 accessoryType 的默认图像。请多多指教，感谢您的耐心阅读!

编辑:到目前为止我尝试过的是:

 - (UITableViewCell *)tableView:(UITableView *)tableView 

cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
//    cell.backgroundColor = UIColorFromRGB(0x717579);
cell.backgroundColor = [UIColor clearColor];
cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.backgroundView.backgroundColor = [UIColor clearColor];
cell.textLabel.backgroundColor = [UIColor clearColor];
cell.textLabel.font = [UIFont fontWithName:NSLocalizedString(@"font_name",nil) size:13];
cell.textLabel.textAlignment = NSTextAlignmentLeft;
cell.textLabel.textColor = [UIColor whiteColor];
UIImageView *trash_icon = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"ic_vehicle_delete.png"]];
if(indexPath.section != [vehicleDetails count]) {
    //cell.accessoryView = trash_icon;  --> If I keep this only Image appears but the action doesn't gets triggered
} else {
     cell.accessoryType = UITableViewCellStyleDefault
}

if(indexPath.section == [vehicleDetails count])
{
    addnewLabel.font = [UIFont fontWithName:NSLocalizedString(@"font_name",nil) size:13];
    addnewLabel.backgroundColor = [UIColor clearColor];
    addnewLabel.textColor = [UIColor whiteColor];
    addnewLabel.text = NSLocalizedString(@"vehicle_new",nil);
    [cell addSubview:addnewLabel];
    cell.textLabel.text = @"";
    UIImageView *background = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"input-plus.png"]]autorelease];
    background.frame = CGRectMake(0, 0, 300, 35);
    if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0"))
        background.frame = CGRectMake(10, 0, 300, 35);
    
    cell.backgroundView = [[[UIView alloc]initWithFrame:CGRectMake(cell.frame.origin.x, cell.frame.origin.y, 300, 35)]autorelease];
    [cell.backgroundView addSubview:background];
}else
{
    cell.textLabel.text =[NSString stringWithFormat:@"Vehicle #%li: %@",indexPath.section+1,[[vehicleDetails objectAtIndex:indexPath.section] valueForKey:@"make"]];
    UIImageView *background = [[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"text field 2x.png"]]autorelease];
    background.frame = CGRectMake(0, 0, 300, 35);
    if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0"))
        background.frame = CGRectMake(10, 0, 300, 35);
    
    
    cell.backgroundView = [[[UIView alloc]initWithFrame:CGRectMake(cell.frame.origin.x, cell.frame.origin.y, 300, 35)]autorelease];
    [cell.backgroundView addSubview:background];
}

return cell;
}

以上方法成功调用

 - (void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath;{
//here I do the delete stuff

但是输出看起来像:

Answer 1

你可以用委托(delegate)设计模式来做

STEP-I : Make the protocol to delegate with cell

这个协议(protocol)你会在UIViewController类中确认并且包含两个方法

• cellDidTaaped:当单元格点击时调用的方法

• accessoryViewDidTapped : accessoryView 确实点击时调用的方法

  protocol ItemCellDelegate :class{
      func cellDidTaaped(withCell cell:ItemCell)
      func accessoryViewDidTapped(withCell cell:ItemCell, state :Bool)
  }
  

STEP-II : Make the UITableViewCell class to customize the accessory view

• 使用 UiimageView 初始化 accessoryView
• 我们将制作两个 UITapGestureRecognizer，当每个人都识别时，代表它的方法将被解雇

注意:我们定义了一个bool Flag，通过协议(protocol)发送给它，判断accessoryView的状态是否需要改变它的图片

class ItemCell: UITableViewCell {

weak var  delegte:ItemCellDelegate?

private var accessoryViewTappedFlag = false


override func awakeFromNib() {
    super.awakeFromNib()

    self.selectionStyle = UITableViewCellSelectionStyle.none
    let cellGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(ItemCell.cellViewDidTapped))
    self.addGestureRecognizer(cellGestureRecognizer)
    let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 40, height: 40))
    imageView.isUserInteractionEnabled = true
    self.accessoryView = imageView
    (self.accessoryView as! UIImageView).image = #imageLiteral(resourceName: "Birthdays")

    let gestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(ItemCell.accessoryViewDidTapped))
    accessoryView!.addGestureRecognizer(gestureRecognizer)
}

func accessoryViewDidTapped() {
    self.accessoryViewTappedFlag = !accessoryViewTappedFlag
    delegte?.accessoryViewDidTapped(withCell: self, state: accessoryViewTappedFlag)
}
func cellViewDidTapped() {
    delegte?.cellDidTaaped(withCell: self)
}

}

STEP-III : Make UIViewControler the delegate of call

tableView调用cellForRowAt时必须确认cell的delegate
功能

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "ItemCell", for: indexPath) as! ItemCell
    cell.delegte =  self
    ....
    return cell
}

STEP-IV : Confirm the delegate of cell at UIViewControler class

确认listItemsVC(UIViewControler)上的ItemCellDelegate并实现方法

extension listItemsVC:ItemCellDelegate{

    func cellDidTaaped(withCell cell: ItemCell) {
        let indexPath = tableView.indexPath(for: cell)
    //.....
    }
    func accessoryViewDidTaaped(withCell cell: ItemCell, state: Bool) {
        let indexPath = tableView.indexPath(for: cell)
        if let accessoryView  = cell.accessoryView as? UIImageView {
            if state{
                accessoryView.image = #imageLiteral(resourceName: "Trips")
            }else{
                accessoryView.image = #imageLiteral(resourceName: "Folder")
            }
        }
    }
}

注意:现在不需要 didSelectRowAt 方法