在我的项目中，我使用Watch Connectivity在 Watch 和 iPhone 之间发送消息。我可以在启动应用程序时向手机发送消息并接收一系列字符串，但是在使用操作时出现以下错误；
错误域 = WCErrorDomain 代码 = 7012 “消息回复时间过长。”
这是设置的方式；
首先，手表向手机发送一条消息，然后手机发送一个字符串数组以显示在WKInterfaceTable. 这有时在加载应用程序时有效。（我获取所有调用的 NSManagedObjectsItems并使用它们的title字符串属性存储在array调用的watchItems.
但是，我在手表上有一个操作来删除数组中的所有项目并用新数据刷新表。
手表上的动作使用一个sendMessage函数发送item到手机从数组中删除，然后手机将新更新的数组发送到手表，手表更新表。但是，我要么得到相同的数组，要么得到一个错误。
很简单，所以在 Swift 3 和 Watch OS3/iOS 10 之前一切正常；整个应用程序曾经工作。
这是我设置所有内容的方式；
电话应用程序代表
import WatchConnectivity
class AppDelegate: UIResponder, UIApplicationDelegate, WCSessionDelegate {
var session : WCSession!
var items = [Items]()
func loadData() {
let moc = (UIApplication.shared.delegate as! AppDelegate).managedObjectContext
let request = NSFetchRequest<Items>(entityName: "Items")
request.sortDescriptors = [NSSortDescriptor(key: "date", ascending: true)]
request.predicate = NSPredicate(format: "remove == 0", "remove")
do {
try
self.items = moc!.fetch(request)
// success ...
} catch {
// failure
print("Fetch failed")
}
}
//WATCH EXTENSION FUNCTIONS
//IOS 9.3
/** Called when the session has completed activation. If session state is WCSessionActivationStateNotActivated there will be an error with more details. */
//HAVE TO INCLUDE
@available(iOS 9.3, *)
func session(_ session: WCSession, activationDidCompleteWith activationState: WCSessionActivationState, error: Error?){
print("iPhone WCSession activation did complete")
}
@available(iOS 9.3, *)
func sessionDidDeactivate(_ session: WCSession) {}
func sessionWatchStateDidChange(_ session: WCSession) {}
func sessionDidBecomeInactive(_ session: WCSession) {
}
//APP DELEGATE FUNCTIONS
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool {
//Check if session is supported and Activate
if (WCSession.isSupported()) {
session = WCSession.default()
session.delegate = self;
session.activate()
}
return true
}
}
//DID RECIEVE MESSAGE
func session(_ session: WCSession, didReceiveMessage message: [String : Any], replyHandler: @escaping ([String : Any]) -> Swift.Void) {
loadData()
func loadItems() {
watchItems.removeAll()
for a in self.items {
watchItems.append(a.title)
}
}
var watchItems = ["1","2","3","4","5"]
let value = message["Value"] as? String
//This is called when user loads app, and takes some time when using refresh action, sometimes times out
if value == "HELLOiPhone/+@=" {
print("Hello Message Recieved")
loadItems()
//send a reply
replyHandler( [ "Items" : Items ] )
}
//Not sure if receiving but does not delete array and send back to watch
if value == "removeALL@+=-/" {
for index in self.items {
index.remove = 1
//Saves MOC
}
loadData()
loadTasksData()
//send a reply
replyHandler( [ "Items" : Items ] )
}
else {
for index in self.items {
if index.title == value {
index.remove = 1
//Saves MOC
}
}
loadData()
loadTasksData()
//send a reply
replyHandler( [ "Items" : Items ] )
}
}
手表
import WatchConnectivity
class SimplelistInterfaceController: WKInterfaceController, WCSessionDelegate {
/** Called when the session has completed activation. If session state is WCSessionActivationStateNotActivated there will be an error with more details. */
@available(watchOS 2.2, *)
public func session(_ session: WCSession, activationDidCompleteWith activationState: WCSessionActivationState, error: Error?) {
//Fetch data is a function which sends a "HELLOiPhone/+@=" message to receive the array and displays in the table. This works
fetchData()
}
var session : WCSession!
var items = ["Refresh Items"]
override func didAppear() {
fetchData()
}
override func willActivate() {
// This method is called when watch view controller is about to be visible to user
super.willActivate()
//Check if session is supported and Activate
if (WCSession.isSupported()) {
session = WCSession.default()
session.delegate = self
session.activate()
}
fetchData()
}
override func awake(withContext context: Any?) {
super.awake(withContext: context)
fetchData()
}
@IBAction func refresh() {
print("Refresh")
//Works but sometimes message is delayed
fetchData()
}
@IBAction func removeAll() {
print("Remove All Items is called")
if WCSession.default().isReachable {
let messageToSend = ["Value":"removeALL@+=-/"]
print("\(messageToSend)")
session.sendMessage(messageToSend, replyHandler: { replyMessage in
if let value = replyMessage["Items"] {
self.items = value as! [String]
Not receiving message
print("Did Recieve Message, items = \(self.items)")
}
}, errorHandler: {error in
// catch any errors here
print(error)
})
}
fetchData()
}
}