如何使用Swift3访问CoreData中的数据索引

Question

I saved datas in entity of CoreData. Also I can access data in CoreData through object.value(forKey:"attribute") . But, I don't know how to access data using index.

follow code is my access way

    let context = getContext()
    let fetchRequest : NSFetchRequest<Entity> = Entity.fetchRequest()
    let result = try? context.fetch(fetchRequest){
       for object in result
       object.value(forKey:"attribute")...
       ...
       }
    }

How to access data in CoreData using index of data?

Answer 1

Your result is type of Array so you can access the object from result like result[0] and so on.

if index < result.count {
    let obj = result[index]
}

If you want index from object, you can use index(of:) for that.

if let index = result.index(of: obj) {
    print(index)
}