我已经下载了这个用于Facebook自定义登录的示例项目：
作为一个测试，我想在facebook sdk上实现这个方法来检索用户页面，如：
/* make the API call */
[FBRequestConnection startWithGraphPath:@"/me/likes"
parameters:nil
HTTPMethod:@"GET"
completionHandler:^(
FBRequestConnection *connection,
id result,
NSError *error
) {
NSLog(@"%@",result);
}];
我在CustomLoginViewController.m中将其复制粘贴，如下所示：
- (IBAction)buttonTouched:(id)sender
{
// If the session state is any of the two "open" states when the button is clicked
if (FBSession.activeSession.state == FBSessionStateOpen
|| FBSession.activeSession.state == FBSessionStateOpenTokenExtended) {
// Close the session and remove the access token from the cache
// The session state handler (in the app delegate) will be called automatically
[FBSession.activeSession closeAndClearTokenInformation];
// If the session state is not any of the two "open" states when the button is clicked
} else {
// Open a session showing the user the login UI
// You must ALWAYS ask for public_profile permissions when opening a session
[FBSession openActiveSessionWithReadPermissions:@[@"public_profile"]
allowLoginUI:YES
completionHandler:
^(FBSession *session, FBSessionState state, NSError *error) {
// Retrieve the app delegate
AppDelegate* appDelegate = [UIApplication sharedApplication].delegate;
// Call the app delegate's sessionStateChanged:state:error method to handle session state changes
[appDelegate sessionStateChanged:session state:state error:error];
[FBRequestConnection startWithGraphPath:@"/me/likes?limit=10"
parameters:nil
HTTPMethod:@"GET"
completionHandler:^(
FBRequestConnection *connection,
id result,
NSError *error
) {
NSLog(@"%@",result);
}];
}];
}
}
当我登录时，我得到一个空数据。
在facebook工作提供的示例中创建方法后，我尝试在我的SignUpSetProfileDetailsViewController.m类中实现下一个代码：
- (void)facebookButtonFunction{
// Open a session showing the user the login UI
// You must ALWAYS ask for public_profile permissions when opening a session
NSArray *permissions = [[NSArray alloc] initWithObjects:
@"public_profile",
@"user_interests ",
nil];
[FBSession openActiveSessionWithReadPermissions:permissions
allowLoginUI:YES
completionHandler:
^(FBSession *session, FBSessionState state, NSError *error) {
[FBRequestConnection startWithGraphPath:@"/me/interests"
parameters:nil
HTTPMethod:@"GET"
completionHandler:^(
FBRequestConnection *connection,
id result,
NSError *error
) {
NSLog(@"%@",result);
}];
// Retrieve the app delegate
// Call the app delegate's sessionStateChanged:state:error method to handle session state changes
[self sessionStateChanged:session state:state error:error];
}];
}
- (void)sessionStateChanged:(FBSession *)session state:(FBSessionState) state error:(NSError *)error
{
// If the session was opened successfully
if (!error && state == FBSessionStateOpen){
NSLog(@"Session opened");
// Show the user the logged-in UI
[self userLoggedIn];
return;
}
if (state == FBSessionStateClosed || state == FBSessionStateClosedLoginFailed){
// If the session is closed
NSLog(@"Session closed");
// Show the user the logged-out UI
[self userLoggedOut];
}
// Handle errors
if (error){
NSLog(@"Error");
NSString *alertText;
NSString *alertTitle;
// If the error requires people using an app to make an action outside of the app in order to recover
if ([FBErrorUtility shouldNotifyUserForError:error] == YES){
alertTitle = @"Something went wrong";
alertText = [FBErrorUtility userMessageForError:error];
[self showMessage:alertText withTitle:alertTitle];
} else {
// If the user cancelled login, do nothing
if ([FBErrorUtility errorCategoryForError:error] == FBErrorCategoryUserCancelled) {
NSLog(@"User cancelled login");
// Handle session closures that happen outside of the app
} else if ([FBErrorUtility errorCategoryForError:error] == FBErrorCategoryAuthenticationReopenSession){
alertTitle = @"Session Error";
alertText = @"Your current session is no longer valid. Please log in again.";
[self showMessage:alertText withTitle:alertTitle];
// For simplicity, here we just show a generic message for all other errors
// You can learn how to handle other errors using our guide: https://developers.facebook.com/docs/ios/errors
} else {
//Get more error information from the error
NSDictionary *errorInformation = [[[error.userInfo objectForKey:@"com.facebook.sdk:ParsedJSONResponseKey"] objectForKey:@"body"] objectForKey:@"error"];
// Show the user an error message
alertTitle = @"Something went wrong";
alertText = [NSString stringWithFormat:@"Please retry. \n\n If the problem persists contact us and mention this error code: %@", [errorInformation objectForKey:@"message"]];
[self showMessage:alertText withTitle:alertTitle];
}
}
// Clear this token
[FBSession.activeSession closeAndClearTokenInformation];
// Show the user the logged-out UI
[self userLoggedOut];
}
}
- (void)userLoggedOut
{
// Set the button title as "Log in with Facebook"
[facebookButtonLabel setText:@"Connect"];
[facebookButtonLabel setTextColor:[UIColor whiteColor]];
}
// Show the user the logged-in UI
- (void)userLoggedIn
{
// Set the button title as "Log out"
[facebookButtonLabel setText:@"Connected"];
[facebookButtonLabel setTextColor:[UIColor yellowColor]];
// Welcome message
[self showMessage:@"You're now logged in with Facebook!" withTitle:@"Welcome!"];
}
- (void)showMessage:(NSString *)text withTitle:(NSString *)title
{
[[[UIAlertView alloc] initWithTitle:title
message:text
delegate:self
cancelButtonTitle:@"OK!"
otherButtonTitles:nil] show];
}
以编程方式添加按钮的地方，我所做的就是丢失appdelegate实现
将user_likes添加到权限
NSArray *permissions = [[NSArray alloc] initWithObjects:
@"public_profile",
@"user_likes",
nil];
虽然单独管理权限列表会更好，但由于存在大量权限（读取和写入），因此需要管理以获取各种数据
更新了按钮功能，现在它可以工作：
- (IBAction)buttonTouched:(id)sender
{
// If the session state is any of the two "open" states when the button is clicked
if (FBSession.activeSession.state == FBSessionStateOpen
|| FBSession.activeSession.state == FBSessionStateOpenTokenExtended) {
// Close the session and remove the access token from the cache
// The session state handler (in the app delegate) will be called automatically
[FBSession.activeSession closeAndClearTokenInformation];
// If the session state is not any of the two "open" states when the button is clicked
} else {
// Open a session showing the user the login UI
// You must ALWAYS ask for public_profile permissions when opening a session
NSArray *permissions = [[NSArray alloc] initWithObjects:
@"public_profile",
@"user_likes",
nil];
[FBSession openActiveSessionWithReadPermissions:permissions
allowLoginUI:YES
completionHandler:
^(FBSession *session, FBSessionState state, NSError *error) {
/* make the API call */
[FBRequestConnection startWithGraphPath:@"/me/likes"
parameters:nil
HTTPMethod:@"GET"
completionHandler:^(
FBRequestConnection *connection,
id result,
NSError *error
) {
NSLog(@"%@",result);
}];
// Retrieve the app delegate
AppDelegate* appDelegate = [UIApplication sharedApplication].delegate;
// Call the app delegate's sessionStateChanged:state:error method to handle session state changes
[appDelegate sessionStateChanged:session state:state error:error];
}];
}
}
另外我学到的是，在开发者Facebook帐户中，你想要检索user_likes，user_interests和其他类似Facebook图形api请求的应用程序，你需要通过转到Facebook上的状态和评论并提交新评论来将其添加到用户权限关于许可，你需要什么以及如何被起诉。