ios - 单击单元格内的按钮时从 UICollectionView 中删除单元格

问题描述

所以，我有一个表单来使用 UITextField 收集用户数据。用户最多可以添加 10 个表单。所以我想将表单创建为 UICollectionView 单元格。

我的问题是在此表单中，如果不再需要该表单，则有一个删除按钮可将其删除。但这仅适用于第一次之后我会收到错误

Fatal error: Index out of range

我很清楚错误的含义，但我不知道如何跟踪我要专门删除的行。

cell.deleteBtn.rx.controlEvent(.touchDown).subscribe(onNext: {_ in
           
            self.data = (self.viewModel?.form.value)!
            self.data.remove(at: row)
            self.viewModel?.form(self.data)
            self.contentViewHeightConstraints.constant -= CGFloat(779)
            

        }).disposed(by: self.disposeBag)

这就是我删除表单的方式。（我也在使用 RxSwift，这是我能想到的使用数组删除的最简单方法）。

我对 Swift 开发还很陌生，所以请原谅我的任何糟糕的编码。请指导我完成这个。

更新：

所以我把函数改成这样：

cell.deleteBtn.rx.controlEvent(.touchDown).subscribe(onNext: {_ in
           
            self.data = (self.viewModel?.form.value)!
            self.data.remove(at: row)
            self.viewModel?.form(self.data)
            self.contentViewHeightConstraints.constant -= CGFloat(779)
            // I can't use index.row so I used row
            let indexPath = IndexPath(row: row, section: 0)
            
            self.collectionView.performBatchUpdates({
                self.collectionView.deleteItems(at: [indexPath])
            }){(finished) in
                self.collectionView.reloadItems(at: self.collectionView.indexPathsForVisibleItems)
                
            }

        }).disposed(by: self.disposeBag)

现在 bam 得到这个错误：

attempt to delete item 1 from section 0 which only contains 1 items before the update

数据源实现：

self.viewModel!.form.asObservable().bind(to: self.formCV!.rx.items){
        tv,row,item in
            let cell = tv.dequeueReusableCell(withReuseIdentifier: "AddFormCell", for: IndexPath.init(row: row, section: 0)) as! AddFormCell
        
        cell.prepareForReuse()
        cell.initCellView()
        cell.iniStatesList()
        
        cell.formCountLbl.text! += " " + String(row + 1)
    
        if self.viewModel?.form.value.count ?? 0 > 1 {
            cell.deleteBtn.isHidden = false
        }else{
            cell.deleteBtn.isHidden = true
        }

添加新表单是这样的：

@IBAction func addShop(){
    var arr = viewModel?.shops.value

    if(arr?.count ?? 0 < 4) {
        arr?.append(formViewModel(shopName: "", shopAddress: "", shopState: "", shopCity: "", shopPostCode: ""))
        
        viewModel?.form.accept(arr ?? [formViewModel(shopName: "", shopAddress: "", shopState: "", shopCity: "", shopPostCode: "")])
        
        self.contentViewHeightConstraints.constant += CGFloat(779)
    }else{
        self.openError()
        
    }

self.data 数组是一个全局数组，定义为简单地从 ViewModel 中删除表单单元格

单元配置：

func configCollectionView(){
    self.collectionView.register(UINib(nibName: addFormCell.identifier, bundle: .main), forCellWithReuseIdentifier: addFormCell.identifier)

    self.shopsCV.delegate = self
    
}

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    let size = Int((collectionView.bounds.width) / CGFloat(numberOfItemsPerRow))
    
    return CGSize(width: size, height: 779)
    
}

numberOfItemsPerRow = 1

标签： iosswiftindexinguicollectionviewdelete-row

cell.deleteBtn.rx.controlEvent(.touchDown).subscribe(onNext: {_ in let point = cell.deleteBtn.convert(CGPoint.zero, to: self.shopsCV) guard let indexPath = self.shopsCV.indexPathForItem(at: point) else{return} self.data = (self.viewModel?.shops.value)! self.data.remove(at: indexPath.row) self.viewModel?.shops.accept(self.data) self.shopsCV.performBatchUpdates({ }){(finished) in self.shopsCV.reloadItems(at: self.shopsCV.indexPathsForVisibleItems) } }).disposed(by: cell.disposeBag) return cell

ios - 单击单元格内的按钮时从 UICollectionView 中删除单元格

问题描述

解决方案

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