Ios 对象映射器/核心数据,对象映射器零值字段
我需要使用一些映射器(例如,对象映射器)将检索到的JSON对象保存到核心数据中。 我正在使用rest api检索此json:Ios 对象映射器/核心数据,对象映射器零值字段,ios,json,swift,core-data,objectmapper,Ios,Json,Swift,Core Data,Objectmapper,我需要使用一些映射器(例如,对象映射器)将检索到的JSON对象保存到核心数据中。 我正在使用rest api检索此json: [ { "event_id": "1", "event_name": "Lungo il tevere", "event_image_url": "https:\/\/www.dayroma.it\/wp-content\/uploads\/2016\/06\/event_fb-9400.jpg", "event_content": "&l
[
{
"event_id": "1",
"event_name": "Lungo il tevere",
"event_image_url": "https:\/\/www.dayroma.it\/wp-content\/uploads\/2016\/06\/event_fb-9400.jpg",
"event_content": "<b>Lungo il Tevere Roma 2016, bancarelle sulle banchine del Tevere<\/b>\r\n\r\n \r\n\r\n ",
"event_start_date": "2016-07-29",
"event_end_date": "2016-07-30",
"event_start_time": "22:00:00",
"event_end_time": "03:00:00",
"location_name": "Lungotevere",
"location_address": "Piazza Navona 2, Roma",
"location_latitude": "41.897785",
"location_longitude": "12.472971"
},
{
"event_id": "8",
"event_name": "test 7 - VIlla BOrghese",
"event_image_url": "https:\/\/www.dayroma.it\/wp-content\/uploads\/2016\/06\/event_fb-9398.jpg",
"event_content": "TEst villa borghese",
"event_start_date": "2016-07-29",
"event_end_date": "2016-07-30",
"event_start_time": "22:00:00",
"event_end_time": "02:00:00",
"location_name": "Villa Borghese",
"location_address": "Villa Borghese 4, Roma",
"location_latitude": "41.912888",
"location_longitude": "12.485208"
}
}
这里是我的对象核心属性:
extension Event {
@NSManaged var eventId: Int
@NSManaged var eventName: String?
@NSManaged var eventImageUrl: String?
@NSManaged var eventContent: String?
@NSManaged var eventStartTime: NSDate?
@NSManaged var eventEndTime: NSDate?
@NSManaged var eventStartDate: NSDate?
@NSManaged var eventEndDate: NSDate?
@NSManaged var locationName: String?
@NSManaged var locationAddress: String?
@NSManaged var locationLatitude: NSNumber?
@NSManaged var locationLongitude: NSNumber?
}
这里是实现可映射的核心数据对象模型:
class Event: NSManagedObject, Mappable {
override init(entity: NSEntityDescription, insertIntoManagedObjectContext context: NSManagedObjectContext?) {
super.init(entity: entity, insertIntoManagedObjectContext: DataController().managedObjectContext)
}
required init?(_ map: Map) {
let ctx = DataController().managedObjectContext
let entity = NSEntityDescription.entityForName("Event", inManagedObjectContext: ctx)
super.init(entity: entity!, insertIntoManagedObjectContext: ctx)
mapping(map)
}
func mapping(map: Map) {
eventId <- map["event_id"]
eventName <- map["event_name"]
eventImageUrl <- map["event_image_url"]
eventContent <- map["event_content"]
eventStartTime <- map["event_start_time"]
eventEndTime <- map["event_end_time"]
eventStartDate <- map["event_start_date"]
eventEndDate <- map["event_end_date"]
locationName <- map["location_name"]
locationAddress <- map["location_address"]
locationLatitude <- map["location_latitude"]
locationLongitude <- map["location_longitude"]
}
}
大部分田地都是零,
你能帮我弄明白是什么问题吗
谢谢您,即使在等待NSNumber或NSDate时,您也只会收到字符串 要使此映射正常工作,应使用ObjectMapper中的自定义转换,并按原样设置映射:
birthday <- (map["birthday"], DateTransform())
生日号码?在里面
//从字符串转换值?到Int?
formatter.numberStyle=.DecimalStyle
返回格式化程序.numberFromString(值!)
},toJSON:
{(值:NSNumber?->字符串?)在
//将值从Int?转换为字符串?
如果let value=value
{
返回字符串(值)
}
归零
})
并使用它:
people <- (map["people"], transform)
people即使在等待NSNumber或NSDate时,您也只会收到字符串
要使此映射正常工作,应使用ObjectMapper中的自定义转换,并按原样设置映射:
birthday <- (map["birthday"], DateTransform())
生日号码?在里面
//从字符串转换值?到Int?
formatter.numberStyle=.DecimalStyle
返回格式化程序.numberFromString(值!)
},toJSON:
{(值:NSNumber?->字符串?)在
//将值从Int?转换为字符串?
如果let value=value
{
返回字符串(值)
}
归零
})
并使用它:
people <- (map["people"], transform)
people从字符串转换为日期的代码在哪里?模型上有NSDate
属性,但JSON包含字符串。您在哪里转换为NSDate
?我不知道在哪里转换每种类型的json格式。。。。这就是问题所在,对象id是int32或int64,那么我的纬度和经度都是双精度的,所有的日期……在哪里可以转换它们?当你给这些属性赋值时。我想也许你的映射框架应该这样做?所以,也许你应该看看框架代码,看看。不过,自己编写代码并不难。从字符串转换为日期的代码在哪里?模型上有NSDate
属性,但JSON包含字符串。您在哪里转换为NSDate
?我不知道在哪里转换每种类型的json格式。。。。这就是问题所在,对象id是int32或int64,那么我的纬度和经度都是双精度的,所有的日期……在哪里可以转换它们?当你给这些属性赋值时。我想也许你的映射框架应该这样做?所以,也许你应该看看框架代码,看看。不过,自己编写代码并不难。
private static let formatter: NSNumberFormatter = NSNumberFormatter()
private let transform = TransformOf<NSNumber, String>(fromJSON:
{ (value: String?) -> NSNumber? in
// transform value from String? to Int?
formatter.numberStyle = .DecimalStyle
return formatter.numberFromString(value!)
}, toJSON:
{ (value: NSNumber?) -> String? in
// transform value from Int? to String?
if let value = value
{
return String(value)
}
return nil
})
people <- (map["people"], transform)