NSUserDefaults. setValue起作用，而不是setBool [英] NSUserDefaults. setValue works, Not setBool

问题描述

我试图在NSUserDefaults中存储一些设置，但是似乎该应用程序不会存储setBool值.

I trying to store some settings in NSUserDefaults, but It seems that the app won't store the setBool values.

这有效:

[[NSUserDefaults standardUserDefaults] setValue: @"hello" forKey: @"test"]; [[NSUserDefaults standardUserDefaults] synchronize];

[[NSUserDefaults standardUserDefaults] setValue: @"hello" forKey: @"test"]; [[NSUserDefaults standardUserDefaults] synchronize];

当我终止应用程序并重新启动它时，该值已保存.但是，当我这样做时:

When I terminate the app and restart it, the value have been saved. However, when I do this:

[[NSUserDefaults standardUserDefaults] setBool: YES forKey: @"test"]; [[NSUserDefaults standardUserDefaults] synchronize]; 关闭应用程序并重新启动后，它将无法保存.

[[NSUserDefaults standardUserDefaults] setBool: YES forKey: @"test"]; [[NSUserDefaults standardUserDefaults] synchronize]; It won't save after I close the app and restart it.

我应该提交错误报告，还是这里缺少什么?

Should I file a bug report, or is there something I'm missing here?

谢谢

我弄清楚我做错了什么.在AppDelegate中，我想检查是否设置了boolForKey，不是我这样做了:

I figure what I did wrong. In AppDelegate, I wanted to check if the boolForKey was set, and it it wasn't I did this:

if (![defaults boolForKey: @"test123"])
[defaults setBool: YES forKey: @"test123"];

...但是，当涉及到boolWithKey时，！"只需检查布尔值是否为是或否，而不是零即可.

... however, when it comes to boolWithKey, the "!" just check if the bool is YES or NO, not if its nil.

推荐答案

如何确定它不起作用?我尝试了您的代码，它对我有用.确定要在编写布尔值之后以正确的方式读取布尔值?

How can you be sure its not working? I tried your code and it works for me. Are you sure you are reading the Boolean in the correct way AFTER you write it?

此代码应正常工作:

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setBool:NO forKey:@"test"];

[defaults synchronize];

BOOL myBool = [defaults boolForKey:@"test"];

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