IOS Facebook Login 首次返回取消状态

Question

我使用目标c代码集成了Facebook登录功能。它只在第一时间返回始终取消状态。我搜索了很多文章。但是，解决方案对我不起作用。谁能帮我做同样的事情？

Answer 1

first import below in your viewcontroller:
#import <FBSDKLoginKit/FBSDKLoginKit.h>
#import <FBSDKCoreKit/FBSDKCoreKit.h>
#import <FBSDKShareKit/FBSDKShareKit.h>
#import <FBSDKLoginManager.h>
In Viewcontroller LoginWithFacebookButton_Clicked,
- (IBAction)LoginWithFacebookButton_Clicked:(id)sender
{
NSHTTPCookieStorage* cookies = [NSHTTPCookieStorage sharedHTTPCookieStorage];
NSArray* facebookCookies = [cookies cookiesForURL:[NSURL URLWithString:@"http://login.facebook.com"]];
for (NSHTTPCookie* cookie in facebookCookies)
{
[cookies deleteCookie:cookie];
}
[FBSDKAccessToken setCurrentAccessToken:nil];
[FBSDKProfile setCurrentProfile:nil];
FBSDKLoginManager *manager=[[FBSDKLoginManager alloc]init];
[manager logOut];
if ([AFNetworkReachabilityManager sharedManager].networkReachabilityStatus==AFNetworkReachabilityStatusNotReachable)
{
[STMethod showInternetToast:self.view];
return;
}
FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];
login.loginBehavior = FBSDKLoginBehaviorWeb;
[login logInWithReadPermissions: @[@"public_profile",@"email"]fromViewController:self handler:^(FBSDKLoginManagerLoginResult result,NSError error)
{
if (error)
{
NSLog(@"Process error");
}
else if (result.isCancelled)
{
NSLog(@"Cancelled");
}
else
{
NSLog(@"Logged in");
FBSDKGraphRequest *request = [[FBSDKGraphRequest alloc]
initWithGraphPath:@"/me"
parameters:@{@"fields": @"id,name,email,first_name,last_name,gender,birthday,picture.type(large)",}
HTTPMethod:@"GET"];
[request startWithCompletionHandler:^(FBSDKGraphRequestConnection connection, id Userresult, NSError error)
{
//Insert your code here
}    

#pragma  mark - Checking for facebook user
AFHTTPSessionManager*manager=[[AFHTTPSessionManager alloc]init];
manager.responseSerializer.acceptableContentTypes = [manager.responseSerializer.acceptableContentTypes setByAddingObject:@"text/html"];
NSDictionary *parameters=@{@"fb_id":[Userresult valueForKey:@"id"],@"device_token":[NSString stringWithFormat:@"%@",[USERDEFAULT valueForKey:kToken]],@"device_type":@"ios"};
[manager POST:WS_FacebookLogin parameters:parameters success:^(NSURLSessionDataTask * Nonnull task, id  Nonnull responseObject)
{

}
failure:^(NSURLSessionDataTask  _Nonnull task, NSError  _Nonnull error)
{
}];
}];
}
}];
}