发送数据

在触发某些事件后，将数据从 iPhone 或从 iPhone 发送到 Watch App 并非常简单，尽管代码看起来有点复杂。

let message = ["key":"value-to-send"]

WCSession.default().sendMessage(message, replyHandler: { (replyMessage) in
    print("Got a reply from the phone: \(replyMessage)")

    if let returnedValues = replyMessage["returned-value"] as? NSArray {
        for val in returnedValues {
            // do something here with the data
            // Dispatch to Main Thread if affecting UI
        }
    }
}, errorHandler: { (error) in
    print("Got an error sending to the phone: \(error)")
})