UNUserNotificationCenter.current().getPendingNotificationRequests {
DispatchQueue.main.async{//Contextual closure type '() -> Void' expects 0 arguments, but 1 was used in closure body
let str:String = ""
self.finalresulter.text = str
self.finalresulter.text = "\($0.map{$0.content.title})"
}
}
You are using $0 inside async { } closure. This closure expects no arguments, which means using $0 argument shortcut is invalid.
You are evidently attempting to refer to requests array from getPendingNotificationRequests callback. The reason you can't by using $0 is that it's screened by DispatchQueue.main.async{ ... } closure with no arguments:
Try this:
UNUserNotificationCenter.current().getPendingNotificationRequests { requests in
DispatchQueue.main.async{
let str:String = ""
self.finalresulter.text = str
self.finalresulter.text = "\(requests.map{$0.content.title})"
}
}
The rule for $0 claims that $0 always refers to current scope. Thus, to access closure argument from nested closure, that argument must be named (requests in the above code).
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