问题描述
此代码在我的应用程序中始终使我无法使用.它确实可以在我复制它的任何其他项目中工作...所以必须将我的standardUserDefaults弄乱了，但是我绝对不知道这怎么可能发生以及如何解决！
This code gives me always NO in my application. It does indeed work in any other project I copy it... so something must be messed up with my standardUserDefaults, but I absolutely don't know how this can happen and how to solve it!
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setBool:YES forKey:@"myKey"];
BOOL test = [defaults boolForKey:@"myKey"];
// test is ALWAYS NO here!
任何人都可以提示我，从哪里开始或如何摆脱它?
Can anybody hint me, where to start or how to get rid of this?
这是一个包含Swift和目标C的混合项目，当我直接将它放入我的applicationDidFinishLaunching
It's a mixed project with swift and objective c and get the same behavior in me AppDelegate.swift, when I put this directly in my applicationDidFinishLaunching
let defaults = NSUserDefaults.standardUserDefaults()
defaults.setBool(true, forKey: "myKey")
let test = defaults.boolForKey("myKey")
// test ALWAYS false here
在有人问:-是的，即使之间调用了同步-是的，这是完整的代码，两行之间没有任何内容...设置并正确处理后不起作用
Before someone asks:- yes, even with synchronize called between it- yes this is the whole code, nothing between the lines... set and get it right after does not work
推荐答案
我找到了一个解决方案，如何解决它，但为什么不这样呢?到目前为止，还没有干净，好的方法.
I found a solution, how to fix it, but not why this happens and no clean, good way so far.
如果有人可以解释一下并给我更好的解决方案，那就这样做！
If anybody could explain this and give me a better solution, do so!
-
问题是:如果删除沙盒应用程序的容器，则还将删除NSUserDefaults的plist，并且不会再次创建它，因此NSUserDefaults根本无法正常工作.
the problem was:If you delete the container of a sandboxed app, you also delete the plist for the NSUserDefaults and it's not created again and so NSUserDefaults simply is not working.
解决方法:我在这里找到 https://ind.ie/labs/blog/app-sandbox-updating-nsuserdefaults-fails-after-deleting-apps-container-directory/，这是系统永久书签的问题.好了，只是清空垃圾桶对我来说不起作用，但是起作用了:我只是创建了丢失的文件！
the workaround:As I found here https://ind.ie/labs/blog/app-sandbox-updating-nsuserdefaults-fails-after-deleting-apps-container-directory/ it's a problem with the permanent bookmark of the system.Well just to empty the trash does not work for me, but what worked: I simply created the missing file!
touch ~/Library/Containers/com.example.myapp/Data/Library/Preferences/com.example.myapp.plist
这篇关于OSX NSUserDefaults不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！