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iosswiftrealm

Errors when creating Realm object classes

I'm trying to write a simple app in Swift, backed with Realm. When I write vars within classes, I keep getting errors such as "Property cannot be implicitly @objc because its type cannot be represented in Objective-C". Sometimes these errors (which seem to involve Objective-C, which I'm not using) appear and sometimes they don't--See screenshots below.

I'm an admitted Newbie to Swift, but I thought I understood enough to get started. Specifically:

1) Should I add "@objc" before the class declaration?

2) Should I add "@objc" before the dynamic var declaration?

3) It seems that a Float var must be initialized, but not so for String?

4) Why does the compiler complain about a declaration on one line, but not about identical syntax in the next line?

Would sure appreciate some guidance, or pointers to specific instructions for creating Realm object classes!

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Solution

  • I reckon the error comes from calling @objc instead of @objcMembers. Try change 

    @objc class Transaction: Object

    to 

    @objcMembers class Transaction: Object

    And remove all @objc in front of your dynamic variables. So your final code should look like:

    import Foundation
import RealmSwift

@objcMembers class Transaction: Object {
    dynamic var picPath: String?
    dynamic var transAmount: Float = 0.0
}

@objcMembers class Transaction: Object {
    dynamic var currentBalance: Float = 0.0
    dynamic var highWaterBalance: Float = 0.0
    dynamic var acctName: String?
}

    Our fellow Paul Hudson has described this attribute on his site hackingwithswift.