JSQMessageAvatarImageFactory错误

Question

由于某种原因，我收到崩溃，我不知道为什么。一切正在从FIRBase正确拉出。但是，试图加载用户URL时，我得到一个崩溃

印刷（快照）

["MediaType": TEXT, "text": Test Message, "senderId": KG7b3tDTaoMwcAQAi2JI8vjj0OB2, "senderName": user1] 
Optional({ 
email = "user1@gmail.com"; 
id = KG7b3tDTaoMwcAQAi2JI8vjj0OB2; 
profileImage = "gs://big-pen.appspot.com/profileImage/KG7b3tDTaoMwcAQAi2JI8vjj0OB2"; 
username = user1;}) 

我的错误

fatal error: unexpectedly found nil while unwrapping an Optional value 
(lldb) 

这里是我的代码。

func observeUsers(id: String){ 
     FIRDatabase.database().reference().child("people").child(id).observeEventType(.Value, withBlock: { snapshot in 
     print(snapshot.value) 
     if let dict = snapshot.value as? [String: AnyObject] { 
      let avatarUrl = dict["profileImage"] as! String 

      //call the setupAvatar function 
      self.avatar(avatarUrl, messageId: id) 

     } 
    }) 
} 


func avatar(url: String, messageId: String){ 

    if DataService.dataService.currentUser != nil{ 
     if url != "" { 
     let fileURL = NSURL(string: url) 
     let data = NSData(contentsOfURL: fileURL!) 
     let image = UIImage(data:data!) //<-----I am getting an error at this line error code: "Thread1:EXC_BAD_INSTRUCTION(code=Exc_I386_INVOP, subcode=0x0)" 
     let userImg = JSQMessagesAvatarImageFactory.avatarImageWithImage(image, diameter: 30) 
      avatarDict[messageId] = userImg 
     }else{  
     JSQMessagesAvatarImageFactory.avatarImageWithImage(UIImage(named: "cam_w.png"), diameter: 30) 
    } 
    collectionView.reloadData() 
    } 
} 

override func collectionView(collectionView: JSQMessagesCollectionView!, avatarImageDataForItemAtIndexPath indexPath: NSIndexPath!) -> JSQMessageAvatarImageDataSource! { 
    let message = messages[indexPath.item] 

    return avatarDict[message.senderId] 
    //return JSQMessagesAvatarImageFactory.avatarImageWithImage(UIImage(named: "cam_w.png"), diameter: 30) 
} 

谢谢。我已经坚持了两天了。

Answer 1

也许这不是一个有效的网址，以便检查它改变你的头像FUNC按键：

func avatar(url: String, messageId: String){ 

    if DataService.dataService.currentUser != nil{ 
     if let fileURL = NSURL(string: url), 
       data = NSData(contentsOfURL: fileURL) { 

     let image = UIImage(data:data!) //<-----I am getting an error at this line error code: "Thread1:EXC_BAD_INSTRUCTION(code=Exc_I386_INVOP, subcode=0x0)" 
     let userImg = JSQMessagesAvatarImageFactory.avatarImageWithImage(image, diameter: 30) 
      avatarDict[messageId] = userImg 
     }else{  
     JSQMessagesAvatarImageFactory.avatarImageWithImage(UIImage(named: "cam_w.png"), diameter: 30) 
    } 
    collectionView.reloadData() 
    } 
}