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Settings

Settings 充当 NSUserDefaults 的封装器，NSUserDefaults 是仅在 iOS 上可用的持久键值存储。

¥Settings serves as a wrapper for NSUserDefaults, a persistent key-value store available only on iOS.

示例​

¥Example

参考

¥Reference

方法​

¥Methods

clearWatch()​

static clearWatch(watchId: number);

watchId 是最初配置订阅时 watchKeys() 返回的号码。

¥watchId is the number returned by watchKeys() when the subscription was originally configured.

get()​

static get(key: string): any;

获取 NSUserDefaults 中给定 key 的当前值。

¥Get the current value for a given key in NSUserDefaults.

set()​

static set(settings: Record<string, any>);

在 NSUserDefaults 中设置一个或多个值。

¥Set one or more values in NSUserDefaults.

watchKeys()​

static watchKeys(keys: string | array<string>, callback: () => void): number;

订阅以在 keys 参数指定的任何键的值在 NSUserDefaults 中更改时收到通知。返回可与 clearWatch() 一起使用以取消订阅的 watchId 号码。

¥Subscribe to be notified when the value for any of the keys specified by the keys parameter has been changed in NSUserDefaults. Returns a watchId number that may be used with clearWatch() to unsubscribe.

注意：watchKeys() 在设计上会忽略内部 set() 调用，并且仅在 React Native 代码外部执行的更改时触发回调。

¥Note: watchKeys() by design ignores internal set() calls and fires callback only on changes preformed outside of React Native code.