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如何清空所有Keychain及UserDefaults

 5 years ago
source link: http://www.cocoachina.com/ios/20181019/25199.html
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我们经常会使用Keychain和UserDefaults来存储iOS App数据。Keychain是iOS设备中的一个安全的存储容器，可以用来为应用保存敏感信息比如用户名，密码，网络密码，认证令牌。

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