在CocoaLibSpotify中,如何让SPLoginViewController存储凭据,以便用户以后可以通过[[SPSession sharedSession] attemptLoginWithStoredCredentials:]自动登录?
答案 0 :(得分:10)
你没有。
相反,实现SPSessionDelegate
方法-session:didGenerateLoginCredentials:forUserName:
并将凭据存储在NSUserDefaults
或其他任何内容中(给定的凭据已经加密并且可以安全地以明文形式存储)。
下次启动您的应用时,如果您有可用的凭据,请完全跳过SPLoginViewController
并使用SPSession
的{{1}}方法登录。如果这会产生登录错误,则令牌已失效,您需要让用户再次登录 - 如果用户在生成令牌后更改了密码,则可能会失效。
请注意,attemptLoginWithUserName:existingCredential:rememberCredentials:
参数和旧rememberCredentials:
方式现在被视为已弃用,并且很快就会消失。
答案 1 :(得分:4)
之前的答案也不再相关,因为attemptLoginWithUserName:existingCredential:rememberCredentials:方法不再存在(尽管它仍然在SPSession.h的注释中引用)
进行设置:
如果以前没有登录,则自动登录或提示用户身份验证:
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSMutableDictionary *storedCredentials = [defaults valueForKey:@"SpotifyUsers"];
if (storedCredentials == nil)
[self performSelector:@selector(showLogin) withObject:nil afterDelay:0.0];
else
{
NSString *u = [storedCredentials objectForKey:@"LastUser"] ;
[[SPSession sharedSession] attemptLoginWithUserName:u existingCredential:[storedCredentials objectForKey:u]];
}
登录时存储凭据的回调方法:
-(void)session:(SPSession *)aSession didGenerateLoginCredentials:(NSString *)credential forUserName:(NSString *)userName
{
NSLog(@"stored credentials");
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSMutableDictionary *storedCredentials = [[defaults valueForKey:@"SpotifyUsers"] mutableCopy];
if (storedCredentials == nil)
storedCredentials = [NSMutableDictionary dictionary];
[storedCredentials setValue:credential forKey:userName];
[storedCredentials setValue:userName forKey:@"LastUser"];
[defaults setValue:storedCredentials forKey:@"SpotifyUsers"];
[defaults synchronize];
}