将JSON字典导入Swift中的核心数据
使用Swift将bools从JSON字典导入下面的将JSON字典导入Swift中的核心数据,json,core-data,import,xcode6,xcode6.1,Json,Core Data,Import,Xcode6,Xcode6.1,使用Swift将bools从JSON字典导入下面的练习对象时遇到了一些问题。拉伸&设备对象是一个快照。我知道这很简单,但我找不到一个可以建模的例子。以下是我的数据模型: 拉伸对象是我的主要实体。 设备对象将包含字符串。 练习对象属性是布尔值 let jsonURL = NSBundle.mainBundle().URLForResource("seed", withExtension: "json")! let jsonData = NSData(contentsOfURL:
练习
对象时遇到了一些问题。拉伸
&设备
对象是一个快照。我知道这很简单,但我找不到一个可以建模的例子。以下是我的数据模型:
拉伸
对象是我的主要实体。
设备
对象将包含字符串。
练习
对象属性是布尔值
let jsonURL = NSBundle.mainBundle().URLForResource("seed", withExtension: "json")!
let jsonData = NSData(contentsOfURL: jsonURL)
var error: NSError?
let jsonArray = NSJSONSerialization.JSONObjectWithData(jsonData!, options: nil, error: &error) as NSArray
// Inserts attributes for database
let entity = NSEntityDescription.entityForName("Stretch", inManagedObjectContext: coreDataStack.context)!
var counter = 0
for jsonDictionary in jsonArray {
counter++
// listing of columns in JSON seed file
let stretchDescription = jsonDictionary.valueForKey("stretchDescription") as String
let generalArea = jsonDictionary.valueForKey("generalArea") as String
let muscleGroup = jsonDictionary.valueForKey("muscleGroup") as String
let equipmentCode = jsonDictionary.valueForKey("equipmentCode") as String
let sideMultiplier = jsonDictionary.valueForKey("sideMultiplier") as NSNumber
let advanced = jsonDictionary.valueForKey("advanced") as Bool
let photo = jsonDictionary.valueForKey("photo") as NSData
let runningOrWalking = jsonDictionary.valueForKey("runningOrWalking") as Bool
let cycling = jsonDictionary.valueForKey("cycling") as Bool
let weightLifting = jsonDictionary.valueForKey("weightLifting") as Bool
let aerobics = jsonDictionary.valueForKey("aerobics") as Bool
let raquetSports = jsonDictionary.valueForKey("raquestSports") as Bool
let golf = jsonDictionary.valueForKey("golf") as Bool
let yoga = jsonDictionary.valueForKey("yoga") as Bool
let equipmentDescription = jsonDictionary.valueForKey("equipmentDescription") as String
let stretch = Stretch(entity: entity, insertIntoManagedObjectContext:coreDataStack.context)
stretch.stretchDescription = stretchDescription
stretch.generalArea = generalArea
stretch.muscleGroup = muscleGroup
stretch.equipmentCode = equipmentCode
stretch.sideMultiplier = sideMultiplier
stretch.advanced = advanced
stretch.photo = photo
// Insert Equipment object
let equipmentEntity = NSEntityDescription.entityForName("Equipment", inManagedObjectContext: coreDataStack.context)
let equipmentDescriptionObject = Equipment(entity: equipmentEntity!, insertIntoManagedObjectContext: coreDataStack.context)
stretch.equipmentUsed = equipmentDescriptionObject
// Figure out exercises object
let exercise = NSEntityDescription.entityForName("Exercises", inManagedObjectContext: coreDataStack.context)
let exerciseObject = Exercises(entity:exercise!, insertIntoManagedObjectContext: coreDataStack.context)
这就是我被困的地方。如何完成为练习对象添加属性
这就是我被困的地方。如何完成为练习对象添加属性
与向拉伸
对象添加属性的方式相同。您可以通过点符号轻松访问和设置练习
属性
let exercise = NSEntityDescription.entityForName("Exercises", inManagedObjectContext: coreDataStack.context)
let exerciseObject = Exercises(entity:exercise!, insertIntoManagedObjectContext: coreDataStack.context)
exerciseObject.aerobics = aerobics
我正在查看这个lib(Sync),它非常适合将JSON对象转换为核心数据对象:
谢谢!在教程中遵循这一点是一回事,但有时非常简单的事情比我参与其中时应该做的更困难;)