当用户登录到应用程序时,您应该通过LinkedIn API请求访问令牌。之后,您使用NSUserDefaults来保存此访问令牌。因此,当用户打开应用程序时,您会检查accesstoken是否存在。如果accesstoken存在,用户已经登录到应用程序。
- (void)getAccessToken:(NSString *)authorizationCode success:(void (^)(NSDictionary *))success failure:(void (^)(NSError *))failure
{
NSString *accessTokenUrl = @"/uas/oauth2/accessToken?grant_type=authorization_code&code=%@&redirect_uri=%@&client_id=%@&client_secret=%@";
NSString *url = [NSString stringWithFormat:accessTokenUrl, authorizationCode, [self.application.redirectURL LIAEncode], self.application.clientId, self.application.clientSecret];
[self POST:url parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSString *accessToken = [responseObject objectForKey:@"access_token"];
NSTimeInterval expiration = [[responseObject objectForKey:@"expires_in"] doubleValue];
// store credentials
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults setObject:accessToken forKey:LINKEDIN_TOKEN_KEY];
[userDefaults setDouble:expiration forKey:LINKEDIN_EXPIRATION_KEY];
[userDefaults setDouble:[[NSDate date] timeIntervalSince1970] forKey:LINKEDIN_CREATION_KEY];
[userDefaults synchronize];
success(responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
failure(error);
}];
}
我没有使用该库,但oauth的重要组成部分是在auth期间获取访问令牌并使用它来签署后续请求。那个图书馆以某种方式这样做。在那里应该有一个显着的访问令牌getter和setter。一旦你发现,在第一次认证之后,在下一次应用程序启动时,在设备上坚持令牌,读取该值并重新设置。 – danh
我应该如何在设备上坚持令牌?以某种方式使用NSUserDefaults? – user2282749
这是一种方式,或文件系统或钥匙串服务(https://developer.apple.com/library/ios/#documentation/security/conceptual/keychainServConcepts/iPhoneTasks/iPhoneTasks.html%23//apple_ref/doc/ uid/TP30000897-CH208-SW1) – danh