尽管按钮显示我已登录，但我的 Facebook 访问令牌为空。有人知道为什么会这样吗？
来自 RootViewController.m
- (void)viewDidLoad {
[super viewDidLoad];
self->login_button = [[FBSDKLoginButton alloc] init];
self->login_button.center = self.view.center;
[self.view addSubview:self->login_button];
FBSDKAccessToken* access_token =[FBSDKAccessToken currentAccessToken];
NSLog(@"Access Token, %@",access_token);
}
来自ApplicationDelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
[self.window setRootViewController:[[RootViewController alloc] init]];
[self.window makeKeyAndVisible];
[self.window setBackgroundColor:[UIColor purpleColor]];
[FBSDKLoginButton class];
return [[FBSDKApplicationDelegate sharedInstance] application:application didFinishLaunchingWithOptions:launchOptions];
}
我的 -ObjC 链接器标志也已设置
需要首先调用 FBSDKApplicationDelegate 来解析缓存的令牌。由于您立即设置根视图控制器，因此会在 FBSDKApplicationDelegate 之前调用 viewDidLoad。相反，您可以将 FBSDKApplicationDelegate 向上移动：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
[FBSDKLoginButton class];
BOOL r = [[FBSDKApplicationDelegate sharedInstance] application:application didFinishLaunchingWithOptions:launchOptions];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
[self.window setRootViewController:[[RootViewController alloc] init]];
[self.window makeKeyAndVisible];
[self.window setBackgroundColor:[UIColor purpleColor]];
return r;
}
本文内容由网友自发贡献，版权归原作者所有，本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容，请联系:hwhale#tublm.com(使用前将#替换为@)
