Question

我有_userLocations:[CLLocation]集合存储用户geoDatas，我想循环抛出_userLocations集合并提取时间戳，纬度和经度属性，并插入到名为savedLocations:[Location]=[]的模型集合中。当我尝试使用循环时for loop我有这个错误_userLocations

＆＃39;类型的价值＆＃39; [位置]＆＃39;没有会员＆＃39;时间戳＆＃39;

有人可以帮助我吗？

我的模特

   class Location {

        @NSManaged var latitude: NSNumber?
        @NSManaged var longitude: NSNumber?
        @NSManaged var timestamp: NSDate?

    }

        for location in _userLocations {
            savedLocations.timestamp = location.timestamp
            savedLocations.latitude = location.coordinate.latitude
            savedLocations.longitude = location.coordinate.longitude
        }

Answer 1

您收到错误Value of type '[Location]' has no member 'timestamp'的原因是因为您的savedLocations是[Location]。 Array没有timestamp属性。

您需要做的是创建一个新的Location对象并插入savedLocations

for location in _userLocations {
    let newLocation = Location()
    newLocation.timestamp = location.timestamp
    newLocation.latitude = location.coordinate.latitude
    newLocation.longitude = location.coordinate.longitude

    savedLocations.append(newLocation)
}

如何从集合属性中提取并插入到swift中的新集合模型中

1 个答案: