实战需求

SwiftUI CoreData 教程之 04 如何创建三层级relationship

本文价值与收获

看完本文后，您将能够作出下面的界面

看完本文您将掌握的技能

• one to many relationship
• 给one to many添加新内容

 private func addItem() {
        // withAnimation {
        let truckItem = Truck(context: viewContext)
        truckItem.id = UUID()
        truckItem.name = "truck_\(Date())"
        
        let newItem = Trailer(context: viewContext)
        newItem.id = UUID()
        newItem.name = "trailer_\(Date())"
        
        let sItem = Sensor(context: viewContext)
        sItem.id = UUID()
        sItem.name = 

标签：教程,truckItem,relationship,viewContext,源码,let,newItem,id
来源： https://blog.csdn.net/iCloudEnd/article/details/115336472