Watch OS 2-如何在Watch上为完全本机应用程序存储数据? [英] Watch OS 2 - How store data on Watch for fully native app?

问题描述

我需要在WatchKit扩展程序-仅监视端上存储大约5个变量.该应用程序将完全本机运行，而无需将任何信息传递给iPhone.如果手表重新启动，我需要数据来保留.该应用程序当前在重启后重置为默认变量状态.我不确定该用什么.我在网上找到了有关使用监视钥匙串存储键-值数据对(用户名/密码)的信息，但我认为这不是我应该使用的.感谢一些帮助.

I need to store about 5 variables on the WatchKit Extension - Watch side Only. The app is going to be completely native, without passing any info to the iPhone. I need the data to persist if the watch is re-booted. The app currently resets to the default variable states upon reboot. I'm not sure what to use. I found information online about using the watch keychain for storing key-value data pairs (username/password), but I don't think that's what I should use here. Appreciate some help.

推荐答案

watchOS 2可以访问CoreData，NSCoding和NSUserDefaults.取决于您要存储的数据，但这是最好的(第一方)选项.

watchOS 2 has access to CoreData, NSCoding and NSUserDefaults. Depends on the data you want to store but those are the best (first party) options.

如果要使用NSUserDefaults，请不要使用standardUserDefaults，而应使用initWithSuiteName:并输入应用程序组的名称.

If you are going to use NSUserDefaults, do not use standardUserDefaults you should use initWithSuiteName: and pass in the name of your app group.

您甚至可以在NSUserDefaults上进行类别/扩展名，以使其更容易.

You could even make a category/extension on NSUserDefaults to make this easier.

@interface NSUserDefaults (AppGroup)
+ (instancetype)appGroupDefaults;
@end

@implementation NSUserDefaults (AppGroup)

+ (instancetype)appGroupDefaults {
    static NSUserDefaults *appGroupDefaults = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        appGroupDefaults = [[NSUserDefaults alloc] initWithSuiteName:@"com.whatever.yourappgroupname"];
    });
    return appGroupDefaults;
}

@end

迅速

private var _appGroupDefaults = NSUserDefaults(suiteName: "com.whatever.yourappgroupname")!

extension NSUserDefaults {
    public func appGroupDefaults() -> NSUserDefaults {
        return _appGroupDefaults
    }
}

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