NSUserDefaults的最佳实践同步 [英] Best Practice for NSUserDefaults synchronize

问题描述

每次我向plist写任何东西时，我都在使用 [[NSUserDefaults standardUserDefaults] synchronize] 。这有点矫枉过正吗？或者这样做会产生不利影响吗？

I'm using [[NSUserDefaults standardUserDefaults] synchronize] each time I write anything to the plist. Is that overkill? Or are there adverse effects in doing this?

推荐答案

是的它可能有点矫枉过正，但在一个简单的应用程序中你会发现性能受到影响？如果您只是在基本用户交互之后保存，例如用户选择其设置，则可能不会。更频繁地调用同步的好处是，如果您的应用程序可能崩溃并且您保存的信息很重要，否则iOS会定期为您保存。

Yes it may be overkill but in a simple application will you notice a performance hit? probably not if you are only saving after basic user interaction such as the user selecting their settings. The benefit to calling synchronize more often is if your application may crash and the information you are saving is important, otherwise iOS will save it for you periodically.

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