数据持久性WatchOS 4.0

时间:2019-07-04 16:42:09

标签: swift watchkit apple-watch

我已经在现有的IOS应用中制作了一个watchApp 我已成功将数据从IOS传递到WatchOS,并通过委托方法在watch OS中接收数据,如下面的代码所示。

我的问题是WatchOS中的数据不是持久的。每当我需要使用watchApp时,我必须先打开IOS应用程序,然后再更新watchApp。

我尝试了AppGroups,但似乎在watchOS 2.0+上不再起作用了。

那么我如何才能将数据保存在watchOS上并仅通过updateApplicationContextWithApplicationContext进行更新?

    NSMutableDictionary * cardDataForWatch = [[NSMutableDictionary alloc] init];

    for (Card * card in self.cards)
    {

        NSMutableDictionary<NSString *, id> *storedData = [[NSMutableDictionary alloc] init];

        Store    * store   = [StoreHelper getStoreForCard:card];
        NSString * color   = [ColorHelper hexStringForColor:[[store getColorPalette] getHighlightColor]];
        NSString * barcode = [card barcode];

        if (color != nil)
        {
            [storedData setValue:color forKey:@"color"];
        }

        if (barcode != nil)
        {
            [storedData setValue:barcode forKey:@"barcode"];
        }

        UIImageView * imageView = [[UIImageView alloc] init];
        imageView.frame = CGRectMake(0, 0, 100, 90);

        [BarcodeRenderer renderBarcode:card to:imageView andLabel:nil];

        NSData * barcodeImage = UIImagePNGRepresentation([imageView image]);
        [storedData setValue:barcodeImage forKey:@"barcodeImage"];

        [cardDataForWatch setValue:storedData forKey:[card store]];
    }

    @try {
        [[WatchSessionManager sharedManager] updateApplicationContextWithApplicationContext:cardDataForWatch error:nil];

然后我通过委托方法在watchOS中接收数据:

func session(_ session: WCSession, didReceiveApplicationContext applicationContext: [String : Any])
    {
        print("? \(applicationContext)")
        self.delegate?.dataFromIOS(DataSource(data: applicationContext))
    }

1 个答案:

答案 0 :(得分:1)

UserDefaults自watchOS 2起可用(用于存储诸如设置之类的轻量数据)。核心数据也可用。

相关问题