Swift - 无法将类型'__NSCFString'的值转换为'NSDictionary' [英] Swift - Could not cast value of type '__NSCFString' to 'NSDictionary'
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问题描述
我得到了这个错误,但是我试图从 Dictionary
获取 String
。这是我的代码:
$ p $
FIRDatabase.database()。reference()。child(users)。child(uid) .observeEventType(.ChildAdded,withBlock:{(snapshot)in
let dictionary = snapshot.value as!NSDictionary
如果让username = dictionary [name] as?如果让userlogin = dictionary [login] as?String {
cell.name.text = username
}
cell.login.text = userlogin
$ b})
Firebase数据库 name和login都是字符串。我不明白是什么问题。
任何帮助将不胜感激!
解决方案
试试这个:$ b $ $ $ $ $ p $ FIRDatabase.database()。reference()。child(users)。child uid).observeEventType(.ChildAdded,withBlock:{(snapshot)in
如果让dictionary = snapshot.value as?NSDictionary {
如果let username = dictionary [name ] as?String {
cell.name.text = username
}
如果让userlogin = dictionary [login] as?String {
cell。 login.text = userlogin
}
}
})
I got this error, but I'm trying to get a String
from a Dictionary
. This is my code:
FIRDatabase.database().reference().child("users").child(uid).observeEventType(.ChildAdded, withBlock: { (snapshot) in
let dictionary = snapshot.value as! NSDictionary
if let username = dictionary["name"] as? String {
cell.name.text = username
}
if let userlogin = dictionary["login"] as? String {
cell.login.text = userlogin
}
})
In my Firebase Database "name" and "login" are both Strings. I cannot understand what's the problem.
Any help would be greatly appreciated!
解决方案
Issue regards snapshot cast to NSDictionary. Since snapshot value is a String. Try this:
FIRDatabase.database().reference().child("users").child(uid).observeEventType(.ChildAdded, withBlock: { (snapshot) in
if let dictionary = snapshot.value as? NSDictionary {
if let username = dictionary["name"] as? String {
cell.name.text = username
}
if let userlogin = dictionary["login"] as? String {
cell.login.text = userlogin
}
}
})
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