ios - 无法从 CloudKit 通知信息和用户信息结构中获取 CKRecord.ID
问题描述
我在公共数据库上为 CloudKit 应用程序设置了订阅。我想从返回的 notificationInfo 中检索 recordName。我无法找到任何文档来解释如何使用框架方法检索记录名称,因此我尝试手动解析信息它不起作用,但这似乎很暴力,我不确定我是否可以指望notificationInfo 结构总是相同的。任何指导将不胜感激。这是代码片段。
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
var changedCKRecord : String
let dict = userInfo as! [String : NSObject]
let notification = CKNotification(fromRemoteNotificationDictionary: dict)
let db = CloudKitDatabase.shared
if notification.subscriptionID == db.ckStyleSubscriptionID {
db.handleNotification()
completionHandler(.newData)
print(".newData for CKStyle returned")
for (key,value) in dict {
if key == "ck" {
let newDict : [String : NSObject] = value as! [String : NSObject]
for (key2,value2) in newDict {
if key2 == "qry" {
let thirdDict : [String : NSObject] = value2 as! [String : NSObject]
for (key3,value3) in thirdDict {
if key3 == "rid" {
if let end = value3 as? String {
changedCKRecord = end
print(changedCKRecord as Any)
}
}//if key3
}//for key3
}//if key2
}//for key 2 in
}//if key is ck
}//for in
} else {
completionHandler(.noData)
print(notification.subscriptionID as Any)
print(db.ckStyleSubscriptionID)
print(".noData for CKStyle returned")
}//if notification else
}//didReceiveRemoteNotification
如果我打印通知信息:
[AnyHashable("aps"): {"content-available" = 1;},
AnyHashable("ck"): {
ce = 2;
cid = "iCloud. the real bundle identifier ";
ckuserid = "_c4478d4d3a212da39cca27eb17dffe03";
nid = "58372f81-d10b-4e3b-98ae-40a0d1e048a2";
qry = {
dbs = 2;
fo = 2;
rid = "97DB306F-3277-07A1-04F5-40228A5EF036";
sid = "ckstyle-changes";
zid = "_defaultZone";
zoid = "_defaultOwner";
};
}]
解决方案
如果通知是订阅的结果,那么CKNotification(fromRemoteNotificationDictionary:)
实际上会返回一个CKQueryNotification
. 然后,您可以访问CKQueryNotification
'srecordID
属性以获取已更改记录的 id。
let dict = userInfo as! [String : NSObject]
let notification = CKNotification(fromRemoteNotificationDictionary: dict)
if let queryNotification = notification as? CKQueryNotification,
let recordName = queryNotification.recordID?.recordName {
print("Record name is \(recordName)")
}
}
推荐阅读
- python - Why is this code not able to extract unicode text from PDFs properly?
- c++ - winrt trouble with std::filesystem?
- javascript - 未捕获的错误:预期 `onClick` 侦听器是一个函数,而不是 `object` 类型的值
- primefaces - Can't redirect to other page when clicking a commandButton in dialog
- r - 在 R 中:如何将函数名(而不是字符)作为参数传递给另一个内部函数而不丢失初始函数名?
- flash - Nibble transposed when storing binary files
- ios - The flashing blue dot (user location) won't move
- python - Adding breakpoints programmatically using pdb in python
- wordpress - Insert ads in wp taxonomy is not working
- c++ - how to delete single data using delete operator in c++