使用目标c保存用户名和密码

Question

我有登录视图，登录后会显示一些列表...所以我想保存用户名和密码，这样如果使用正确的ID登录，则登录视图不会出现一次，直接输入密码会显示该列表

Answer 1

As others have suggested, you can use NSUserDefaults .

If you are storing the password, then I would suggest you also add a level of security to this. You could use Secure NSUserDefaults (I've not used this personally, but seen a few people reporting it being useful). You can find that here

Or you can use the KeyChain API

Answer 2

If you do not care about encryption, you could save these very simply with

[[NSUserDefaults standardUserDefaults] setValue:@"username" forKey:@"username"]; 
[[NSUserDefaults standardUserDefaults] setValue:@"secret" forKey:@"password"]; 

and check those during program startup with

if (![[NSUserDefaults standardUserDefaults] valueForKey:@"username"]) {
   // show the login screen
}

Answer 3

您可以使用NSUserDefaults 有关NSUserDefaults的Apple文档

Answer 4

You can save this in the NSUserDefaults like this :

NSUserDefaults *userDefaults = [NSUserDefaults standardDefaults];
[userDefaults setBool@"YES" forlkey@"userDidLogin"];

And you test like this :

NSUserDefaults *userDefaults = [NSUserDefaults standardDefaults];

if([userDefaults boolForKey:@"userDidLogin"])
{
.... // Go to the list View
}

This is just an indication, if you would like to put it to work , you should show your code how you implement the implémentation of login interface

Answer 5

NSUserDefaults is just a handy way designed for customize app's preferences. In normal situation, an app will stay in it's own sandbox and therefore other apps won't be able to access it.

However it is not the best choice to do so. It's not good practice. What you really need is keychain and see here for apple's sample code for it, it's much safer in terms of security.

Answer 6

there are multiple ways to save user name and password.. You can save in UserDefalt as above answer. also you can save in plist.