为啥在 iOS 13 中的 textfieldBeginEditing 之后立即调用 textfieldDidEndEditing？在 iOS 较低版本中运行良好

Posted 2023-02-24

【中文标题】为啥在 iOS 13 中的 textfieldBeginEditing 之后立即调用 textfieldDidEndEditing？在 iOS 较低版本中运行良好

【英文标题】：Why does textfieldDidEndEditing getting called immediately after textfieldBeginEditing in iOS 13? Works Fine in iOS lower versions为什么在 iOS 13 中的 textfieldBeginEditing 之后立即调用 textfieldDidEndEditing？在 iOS 较低版本中运行良好

【发布时间】：2019-10-01 07:30:48

【问题描述】：

我想编辑文本字段的文本并在用户在集合视图单元格上向左滑动并单击重命名时保存它。所以每当单击重命名时我都会写 cell.textfield.becomefirstresponder() ..然后在处理的情况下textfield 委托方法，首先调用 textDidBeginEditing ，然后甚至不做任何事情，调用 textfieldDidEndEditing 退出响应者状态。它仅在 ios 13 中发生

public func textFieldDidBeginEditing(_ textField: UITextField) 
        self.emptyView.isHidden = true
    

    public func textFieldDidEndEditing(_ textField: UITextField, reason: UITextFieldDidEndEditingReason) 
        setChangedValues(selectedTextField: textField)
    

    public func textFieldShouldReturn(_ textField: UITextField) -> Bool 

        //setChangedValues(selectedTextField: textField)
        textField.resignFirstResponder()
        return true
    

    public func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool 


        if range.location == 0 && string == " " 
            return false
        

        //Fix:- when u remove the text completely and still textfield contains the last character
        if range.location == 0 && string == "" 
            textField.text = ""
        

        //Setting the limit
        var maxLimit = 50
        if textField.tag == 2 
            maxLimit = 15
        
        let newLength = (textField.text?.count)! + string.count - range.length

        if newLength <= maxLimit 
            //If new character is typed

         else 
            //If the entered character is more than the limit, return false
            return newLength<=maxLimit
        

        return true
    

    func setChangedValues(selectedTextField: UITextField) 

        if (selectedTextField.text?.isEmpty)! 
            assetsTableView.reloadData()
         else 

            var assetModels = Array<FHTeamAssetsModel>()
            if isEdit 
                //Both are different, please update
                if selectedTextField.text != assetsList[selectedAsset!][WPEConstants.ASSET__NAME]! 
                    //Getting the asset based on asset list selection
                    let asset = FHBase.getAssetModel(id: assetsList[selectedAsset!][WPEConstants.ASSET__ID]!)
                    asset.name = selectedTextField.text
                    FHBase.updateTeamAssets(model: asset)

                
                if selectedPath > 0 

                    //Getting the updated sub asset list
                    assetModels = FHBase.getTeamAssetsModels(assetId: assetsPathArray[selectedPath][WPEConstants.ASSET_ID])
                 else 
                    //Getting the updated asset list(without assetId)
                    assetModels = FHBase.getTeamAssetsModels(assetId: nil)
                

             else 
            if selectedPath > 0 
                //Creating a new sub-asset, with assetId
                FHBase.shared.createAssetsModel(name: selectedTextField.text, assetId: assetsPathArray[selectedPath][WPEConstants.ASSET_ID], assetName: assetsPathArray[selectedPath][WPEConstants.ASSET_NAME])

                //Getting the updated sub asset list
                assetModels = FHBase.getTeamAssetsModels(assetId: assetsPathArray[selectedPath][WPEConstants.ASSET_ID])


             else 
                //Creating a new asset(without assetId)
                FHBase.shared.createAssetsModel(name: selectedTextField.text, assetId: nil, assetName: nil)
                //Getting the updated asset list(without assetId)
                assetModels = FHBase.getTeamAssetsModels(assetId: nil)
            

            

            //Creating asset list
            self.createAssetsList(assetModels: assetModels)

            assetsTableView.reloadData()
            self.isEdit = false
        

        self.updateEmptyStateUI()
    

【问题讨论】：

我也在为类似的问题而苦苦挣扎，仅在 iOS 13 上也是如此......

【参考方案1】：

检查是否有人禁用了 textField！