Facebook SDK 4.7登录错误处理 [英] Facebook SDK 4.7 Login error handling
本文介绍了Facebook SDK 4.7登录错误处理的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
致命错误:意外发现零,同时解开一个可选的值
我如何处理这个错误?
当前登录代码:
如果让fbLoginManager:FBSDKLoginManager = FBSDKLoginManager(){
fbLoginManager.logInWithReadPermissions([email],fromViewController:self,
处理程序:{(result:FBSDKLoginManagerLoginResult!,error:NSError!) - > Void in
if (error == nil){
let fbloginresult:FBSDKLoginManagerLoginResult = result
if(fbloginresult.grantedPermissions.contains(email))
{
print(Logged in successfully )
self.getFBUserData()
//fbLoginManager.logOut()
}
}
else {
print(HELPPPPPPPP)
}
})
}
解决方案
p>不需要分配类型o f变量(结果,错误)
:
这是Facebook的工作代码4.7 SDK | Swift 2 | Xcode 7。
@IBAction func btnFBLoginPressed(sender:AnyObject){
let fbLoginManager:FBSDKLoginManager = FBSDKLoginManager()
fbLoginManager.loginBehavior = FBSDKLoginBehavior.Web
fbLoginManager.logInWithReadPermissions([email],fromViewController:self,handler:{(result,error) - > Void in
if(error == nil){
let fbloginresult:FBSDKLoginManagerLoginResult = result
如果fbloginresult.grantedPermissions!= nil {//这里我们必须检查该集合是否包含
if(fbloginresult.grantedPermissions.contains (email))
{
self.getFBUserData()
fbLoginManager.logOut()
}
}
}
})
}
func getFBUserData(){
if((FBSDKAccessToken.currentAccessToken())!= nil){
FBSDKGraphRequest(graphPath:me :[fields:id,name,first_name,last_name,picture.type(large),email])。startWithCompletionHandler({(connection,result,error))>空虚
if(error == nil){
print(result)
}
})
}
}
我们必须检查 approvedPermissions
的设置
是 nil
。
if fbloginresult.grantedPermissions!= nil {//这里我们必须检查该集合是否包含
I added FBSDK 4.7 to my swift app and when it opens the safari view controller to login, and I try to tap "Done" without inputting anything into the email/password fields, the app breaks. It spits out "fatal error: unexpectedly found nil while unwrapping an Optional value"
How do I handle this error?
Current login code:
if let fbLoginManager : FBSDKLoginManager = FBSDKLoginManager(){
fbLoginManager.logInWithReadPermissions(["email"],fromViewController:self,
handler:{(result:FBSDKLoginManagerLoginResult!,error:NSError!) -> Void in
if (error == nil){
let fbloginresult : FBSDKLoginManagerLoginResult = result
if(fbloginresult.grantedPermissions.contains("email"))
{
print("Logged in successfully")
self.getFBUserData()
//fbLoginManager.logOut()
}
}
else{
print("HELPPPPPPPPPP")
}
})
}
解决方案
No need to assign the types of variable (result, error)
:
Here is working code with Facebook 4.7 SDK | Swift 2 | Xcode 7.
@IBAction func btnFBLoginPressed(sender: AnyObject) {
let fbLoginManager : FBSDKLoginManager = FBSDKLoginManager()
fbLoginManager.loginBehavior = FBSDKLoginBehavior.Web
fbLoginManager.logInWithReadPermissions(["email"], fromViewController: self, handler: { (result, error) -> Void in
if (error == nil){
let fbloginresult : FBSDKLoginManagerLoginResult = result
if fbloginresult.grantedPermissions != nil { //Here we have to check that the set contains value or not
if(fbloginresult.grantedPermissions.contains("email"))
{
self.getFBUserData()
fbLoginManager.logOut()
}
}
}
})
}
func getFBUserData(){
if((FBSDKAccessToken.currentAccessToken()) != nil){
FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "id, name, first_name, last_name, picture.type(large), email"]).startWithCompletionHandler({ (connection, result, error) -> Void in
if (error == nil){
print(result)
}
})
}
}
We have to check the grantedPermissions
's Set
is nil
or not.
if fbloginresult.grantedPermissions != nil { //Here we have to check that the set contains value or not
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