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我们正在构建一个费用管理器应用程序。我想保留一些卸载和安装应用程序的数据。有什么方法可以保留数据吗?我可以将数据用作密码并存储在钥匙串中吗?
Yes, saving in iOS keychain is the recommended way of saving data across reinstalls. But make sure you check the limits on amount of data you can save. A few key value pairs shouldn't be a problem.