2
，我發現了以下異常：NSInvalidArgumentException與FBSDKGraphRequest
終止應用程序由於未捕獲的異常 'NSInvalidArgumentException'，原因是： ' - [__ NSCFDictionary imagePathForPictureMode：大小：]：無法識別的選擇發送到實例0x7ff9f8d25d10'
與此代碼：
PFFacebookUtils.logInInBackgroundWithReadPermissions(permissions, block: {
(user: PFUser?, error: NSError?) -> Void in
if let user = user {
if user.isNew {
var request = FBSDKGraphRequest(graphPath: "me", parameters: nil)
request.startWithCompletionHandler({
(connection, result, error) -> Void in
if error == nil {
// exception thrown next line
let strProfilePicURL = result.imagePathForPictureMode(FBSDKProfilePictureMode.Square, size: self.profileImage.frame.size)
let url = NSURL(string: strProfilePicURL, relativeToURL: NSURL(string: "http://graph.facebook.com/"))
let imageData = NSData(contentsOfURL: url!)
let image = UIImage(data: imageData!)
self.profileImage.image = image!
}
})
println("User signed up and logged in through Facebook!")
} else {
println("User logged in through Facebook!")
}
} else {
println("Uh oh. The user cancelled the Facebook login.")
}
})
爲什麼在這裏拋出異常？我也試過：
let size = self.profileImage.frame.size as CGSize
let strProfilePicURL = result.imagePathForPictureMode(FBSDKProfilePictureMode.Square, size: size)
主要是因爲圖形請求（如/ me）的結果不是FBSDKProfile。 –
@MingLi我的不好！我認爲這是因爲代碼完成自動建議'imagePathForPictureMode' ...我嘗試過'FBSDKProfile.currenProfile（）'，但它總是似乎爲零。任何想法爲什麼？ – doovers
你有一個有效的訪問令牌嗎？在獲取訪問令牌之後，「currentProfile」是異步獲取的，因此根據何時請求當前配置文件，它可能爲零。您也可以在配置文件更新時觀察FBSDKProfileDidChangeNotification。請參閱https://developers.facebook.com/docs/reference/ios/current/class/FBSDKProfile/ –