owenzhao

print(Thread.current) //可以调试当前的thread

owenzhao

class Foo:Object {
    dynamic var id:Int = 0
    dynamic var name:String = ""
    
    override class func primaryKey() -> String? {
        return "id"
    }
}

let bar = Foo()

owenzhao

struct Foo {
   var name:String
}
let bar = Foo(name:"John")

owenzhao

class Foo:Object {
    dynamic var name:String = ""
}
let bar = Foo()

let realm = try! Realm()
try! realm.write {
	realm.add(bar)
}

owenzhao

let bar = Foo()
bar.name = "Marry" // ok

let realm = try! Realm()
try! realm.write {
	realm.add(bar)
	bar.name = "Kelly" // ok
}

bar.name = "Jimmy" // *** Terminating app due to uncaught exception 'RLMException', reason: 'Attempting to modify object outside of a write transaction - call beginWriteTransaction on an RLMRealm instance first.'

owenzhao

let anotherBar = Foo()
anotherBar.name = bar.name
  
try! realm.write {
    realm.add(anotherBar)
}

owenzhao

let anotherBar = Foo()
anotherBar.name = bar.name
  
try! realm.write {
    realm.add(anotherBar)
    realm.delete(bar)
}

owenzhao

class Fruit:Hashable {
    let name:String
    
    var hashValue: Int {
        return name.hashValue
    }
    
    init(name:String) {
        self.name = name
    }

owenzhao

class Apple:Fruit {
    override var hashValue: Int {
        return super.hashValue - "apple".characters.count
    }
}

class Banana:Fruit {
    override var hashValue: Int {
        return super.hashValue - "banana".characters.count
    }

owenzhao

class Fruit:Hashable {
    let name:String
    
    var hashValue: Int {
        return name.hashValue
    }
    
    init(name:String) {
        self.name = name
    }