核心数据中的多次插入

Posted 2023-03-12

【中文标题】核心数据中的多次插入

【英文标题】：Multiples inserts in core data

【发布时间】：2017-06-21 12:35:28

【问题描述】：

我有很多信息要重新填充我的数据库，我就是这样做的：

let notaryFeeGrid = NSEntityDescription.insertNewObject(forEntityName: "NotaryFeeGrid", into: context) as! NotaryFeeGrid

notaryFeeGrid.id = 0
notaryFeeGrid.notaryLoansAmount = 1000
notaryFeeGrid.notaryFeeAmount = 510

context.insert(notaryFeeGrid)


let notaryFeeGrid2 = NSEntityDescription.insertNewObject(forEntityName: "NotaryFeeGrid", into: context) as! NotaryFeeGrid

notaryFeeGrid2.id = 0
notaryFeeGrid2.notaryLoansAmount = 3000
notaryFeeGrid2.notaryFeeAmount = 530

context.insert(notaryFeeGrid2)

let notaryFeeGrid3 = NSEntityDescription.insertNewObject(forEntityName: "NotaryFeeGrid", into: context) as! NotaryFeeGrid

notaryFeeGrid3.id = 0
notaryFeeGrid3.notaryLoansAmount = 5000
notaryFeeGrid3.notaryFeeAmount = 570

context.insert(notaryFeeGrid3)

这是完整代码的一小部分，我怎样才能将其最小化？

【问题讨论】：

为所有重复代码创建一个函数。然后对于每个“插入”，调用你的函数。

@AgRizzo 使用数组之类的东西可以做得更好吗？

【参考方案1】：

试试这个......创建一个公证项数组......

更新：

func addNotary(_ context : NSManagedObjectContext,_ notaryArray: Array) -> Bool 

    for index in 0...notaryArray.count - 1
    
        let notary : Dictionary = notaryArray[index] as! Dictionary
        let notaryFeeGrid = NSEntityDescription.insertNewObject(forEntityName: "NotaryFeeGrid", into: context) as! NotaryFeeGrid

        notaryFeeGrid.id = notary["id"]
        notaryFeeGrid.notaryLoansAmount = notary["notaryLoansAmount"]
        notaryFeeGrid.notaryFeeAmount = notary["notaryFeeAmount"]
    

    var error: NSError?
    let success = context.save(&error)
    if !success 
        print("Save failed")