Spotify SPLoginViewController以记住凭据

在CocoaLibSpotify中，如何让SPLoginViewController存储凭据，以便用户以后可以通过[[SPSSession sharedSession]attemptLoginWithStoredCredentials:]自动登录？

您不需要

相反，实现

SPSessionDelegate

方法

-session:didGenerateLoingCredentials:forUserName:

并将凭据存储在

NSUserDefaults

或其他任何文件中（给定的凭据已经加密，可以安全地存储在明文中）

下次启动应用程序时，如果您有可用的凭据，请完全跳过

SPLoginViewController

，并使用

SPSession

的

attemptLoginWithUserName:ExistingCredentials:rememberCredentials:

方法登录。如果这会生成登录错误，则令牌已无效，您需要要求用户再次登录-如果用户在生成令牌后更改了密码，则可能会发生无效

---

请注意，

rememberCredentials:

参数和旧的

attemptLoginWithStoredRedentials:

操作方式现在被认为是不推荐的，很快就会消失。

前面的答案也不再与用户名为：existingCredential:rememberCredentials:method的attemptLoginWithUserName:existingCredential相关（尽管SPSSession.h的评论中仍提到了这一点）

要获取设置，请执行以下操作：

从github获取最新的cocoalibspotify并在Xcode中构建：

构建并放入您的项目：

要自动登录或在以前未登录时提示用户身份验证，请执行以下操作：

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]];
}

-(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];
}

用于在登录时存储凭据的回调方法：

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]];
}

-(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];
}