Reputation: 179
I'm beginning to learn swift with parse and i've run into this error:
"Value of optional type 'PFUser?' not unwrapped; did you mean to use '!' or '?'
I can't seem to get it to work...
PFFacebookUtils.logInWithPermissions(["public_profile",
"user_about_me", "user_birthday"], block: {
user, error in
if user == nil {
println("the user canceled fb login")
//add uialert
return
}
//new user
else if user.isNew {
println("user singed up through FB")
//get information from fb then save to parse
FBRequestConnection.startWithGraphPath("/me?fields=picture,first_name,birthday,gender", completionHandler: {
connection, result, error in
//print results
println(result)
//result dictionary about user
var r = result as NSDictionary
//prnt dictionary
println(NSDictionary)
//match parse column with what fb sends
user["firstName"] = r["first_name"]
user["gender"] = r["gender"]
//r = result, then key into using picture. Then key into url using the data
let pictureURL = ((r["picture"] as NSDictionary)["data"] as NSDictionary) ["url"] as String
Upvotes: 0
Views: 152
Reputation: 4605
Here is explanation: What is an "unwrapped value" in Swift?
PFFacebookUtils.logInWithPermissions(["public_profile",
"user_about_me", "user_birthday"], block: {
user, error in
if user == nil {
println("the user canceled fb login")
//add uialert
return
}
//new user
else if user!.isNew {
println("user singed up through FB")
//get information from fb then save to parse
FBRequestConnection.startWithGraphPath("/me?fields=picture,first_name,birthday,gender", completionHandler: {
connection, result, error in
//print results
println(result)
//result dictionary about user
var r = result as NSDictionary
//prnt dictionary
println(NSDictionary)
//match parse column with what fb sends
user["firstName"] = r["first_name"]
user["gender"] = r["gender"]
//r = result, then key into using picture. Then key into url using the data
let pictureURL = ((r["picture"] as NSDictionary)["data"] as NSDictionary) ["url"] as String
Upvotes: 1
Reputation: 7400
Instead of using if user == nil {...
you should really use
if let user = user {
// Login succeeded...
}
else {
// Login failed
}
The variable user
will then be unwrapped inside the if let
and you can continue using user
the same way you are.
Upvotes: 2