如何在KeychainItemWrapper中保存布尔值 [英] how to save bool value in KeychainItemWrapper
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问题描述
我想将bool值存储在KeychainItemWrapper中,如何存储?
I want to store bool value in KeychainItemWrapper, how to store ?
我已经尝试过此代码,但是它给了我错误.
I have tried this code, but it gives me error.
[keychain setObject:YES forKey:(__bridge BOOL)kSecAttrIsInvisible];
推荐答案
BOOL
是基本类型,setObject:forKey:
仅是从NSObject
派生的类除外.
The BOOL
is a primitive type and the setObject:forKey:
only excepts classes that derive from NSObject
.
So use NSNumber
it has a special method for it + numberWithBool:
:
[keychain setObject:[NSNumber numberWithBool:YES] forKey:@"someKey"];
如果您需要再次bool:
And if you need to bool again:
NSNumber *value = [keychain objectForKey:@"someKey"];
BOOL boolValue = [value boolValue];
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