ios - 为什么方法 updateApplicationContext 返回 "Payload contains unsupported type."

Question

我正在调用方法:

 open func updateApplicationContext(_ applicationContext: [String : Any]) throws

这需要 [String : Any]。

我有返回的方法:

 func watchData() -> [String: Any] {
        var dictionary = [String: Any]()
        let wallets = Database.sharedInstance.database.objects(Wallet.self)
        for wallet in wallets {
            if let qrCode = QRCode(wallet.address) {
                 let watchWallet = WatchWallet(fund: wallet.fund, avaliable: wallet.avaliable, address: wallet.address, imageData: qrCode.PNGData)
                  dictionary[wallet.fund] = watchWallet
            }
        }
        return dictionary
    }

并且从 watchData() 返回的数据无效。

WatchWallet 是 strcut。

struct WatchWallet {
    let fund: String
    let avaliable: String
    let address: String
    let imageData: Data
}

我想知道我错过了什么。

方法错误:

无法发送应用程序上下文:错误域=WCErrorDomain 代码=7010“负载包含不受支持的类型。” UserInfo={NSLocalizedDescription=Payload 包含不受支持的类型。, NSLocalizedRecoverySuggestion=只传递有效类型。}

Answer 1

发件人:https://developer.apple.com/library/content/documentation/General/Conceptual/WatchKitProgrammingGuide/SharingData.html

For most types of transfers, you provide an NSDictionary object with the data you want to send. The keys and values of your dictionary must all be property list types, because the data must be serialized and sent wirelessly. (If you need to include types that are not property list types, package them in an NSData object or write them to a file before sending them.)

因此，字典是 [String: Any] 的事实具有误导性，因为 Any 值仅限于有效的属性列表类型。完整的类型列表在下面的文章中，但如您所料)包括基本类型、数组、字典和 NSData:

https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/PropertyLists/AboutPropertyLists/AboutPropertyLists.html