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我必须将Entity和两者都连接起来。如何在NSSet核心数据中保存值(Swift)
我想插入在公司实体价值的价值,但我不知道如何将在company.employees(NSSet中)值。
员工和公司类给出如下:
extension Employees {
@NSManaged var name: String?
@NSManaged var age: NSNumber?
@NSManaged var address: String?
@NSManaged var company: Company?
}
extension Company {
@NSManaged var name: String?
@NSManaged var employees: NSSet?
}
// here i want to insert value
func addEmployees() {
let companyEntity = NSEntityDescription.entityForName("Company", inManagedObjectContext: managedContext)
let company = Company(entity: companyEntity!, insertIntoManagedObjectContext: managedContext)
company.name = txtCompany.text
let employeesEntity = NSEntityDescription.entityForName("Employees", inManagedObjectContext: managedContext)
let employees = Employees(entity: employeesEntity!, insertIntoManagedObjectContext: managedContext)
employees.name = txtName.text
employees.age = Int(txtAge.text!)
employees.address = txtAddress.text
// getting no idea here how to save values to NSSet??
// company.employees =
do {
try managedContext.save()
} catch {
fatalError("Error in saving Data...")
}
}
感谢您的回复,但我想从company.employees这是键入关闭NSSet –
做到这一点使用我的答案将具有完全相同的结果,除非你不需要混淆套。 – jrturton
@ S.Bharti你会把alreadyl的'Company'和'Employee'建立关系。只需用另一种方式来定义关系。它以任何方式完成相同的事情,并且这种方式更容易编码。 – Fogmeister