我有一堆方法可以在Realm数据库中异步保存与视频录制相关的摄像机名称。
我的模特：
/**
Realm object for saving the camera names used
to record clip videos
*/
public class RMCamera: Object {
dynamic var id = ""
dynamic var name = ""
override public class func primaryKey() -> String {
return "id"
}
}
将相机保存在Realm中的方法：
/**
Saves camera names for offline usage after deleting
all current entries first.
- parameter cameraNames: An array of string with the camera names to save
*/
public func saveCameraNames(cameraNames: [String]) {
logv(" Saving camera names...")
concurrentQueueBg.async {
let realm = try! Realm()
self.deleteCamerasFromRealm(realm)
cameraNames.forEach { camera in
let offlineCamera = RMCamera(value: ["id": NSUUID().UUIDString, "name": camera])
do {
try realm.write {
realm.add(offlineCamera)
}
} catch {
loge("Error adding offline camera")
}
}
}.notify(.Main) {
logv("✅ Camera names saved!")
}
}
首先清除Realm中所有摄像机条目的方法：
/**
Deletes all camera names saved in the passed Realm
- parameter realm: A Realm database instance to use
*/
func deleteCamerasFromRealm(realm: Realm) {
let cameras = realm.objects(RMCamera)
try! realm.write {
realm.delete(cameras)
}
}
问题是每隔一段时间我就会遇到这样的错误：
Can't set primary key property 'id' to existing value '572cb087b974c25b01fa40c1'.
任何想法可能实际出错？我真的不认为我会遇到来自UUID一代的冲突。