Ambiguous reference to member 'count' #2 - swift

Question

I have these two functions:
func search_DocumentMultimedia(documentId: Int) -> Array<Int>{
var array:[Int]
let downloadUrl = FileManager.default.urls(for:.downloadsDirectory, in: .userDomainMask)[0]
let path = downloadUrl.appendingPathComponent("mwb_" + language + "_" + issue + ".db")
do{
let db = try Connection(path.absoluteString)
let documentMultimediaTable = Table("DocumentMultimedia")
let documentMultimediaIdField = Expression<Int>("DocumentMultimediaId")
let documentIdField = Expression<Int>("DocumentId")
for media in try db.prepare(documentMultimediaTable.select(documentMultimediaIdField, documentIdField).where(documentIdField == documentId)) {
array.append(media[documentMultimediaIdField])
}
} catch{
print(error)
}
return array
}
func search_Multimedia(multimediaID: [Int]) -> Array<mediaData>{
var array:[mediaData]
let downloadUrl = FileManager.default.urls(for:.downloadsDirectory, in: .userDomainMask)[0]
let path = downloadUrl.appendingPathComponent("mwb_" + language + "_" + issue + ".db")
ForEach(0..<multimediaID.count, id: \.self) { index in
do{
let db = try Connection(path.absoluteString)
let documentMultimediaTable = Table("Multimedia")
let MultimediaIdField = Expression<Int>("MultimediaId")
let keySymbol = Expression<String>("KeySymbol")
let track = Expression<Int>("Track")
let issueTagNumber = Expression<Int>("IssueTagNumber")
let mimeType = Expression<String>("MimeType")
let filePath = Expression<String>("FilePath")
for media in try db.prepare(documentMultimediaTable.select(MultimediaIdField, keySymbol, track, issueTagNumber, mimeType, filePath).where(MultimediaIdField == multimediaID[index])) {
let data = mediaData(mediaID: media[MultimediaIdField], mediaType: media[keySymbol], track: media[track], issueTagNumber: media[issueTagNumber], mimeType: media[mimeType], filePath: media[filePath])
array.append(data)
}
} catch{
print(error)
}
}
return array
}
I call them like this:
func getMedia(documentId: Int, nextDocumentId: Int) /*-> Array<videoData>*/ {
let multimediaId:[Int] = JW.search_DocumentMultimedia(documentId: documentId)
let mediaData:[mediaData] = JW.search_Multimedia(multimediaID: multimediaId)
print(mediaData)
}
In search_Multimedia I keep getting an error that says 'Ambiguous reference to member 'count''. I get this error on ForEach statement that uses multimediaID.count. I have tried everything but can't find how to resolve this. Please could you lend a hand? I saw a similar question on here but it seems to be outdated - hence my post.

Answer 1

You are using ForEach where ForEach is not appropriate. The purpose of ForEach is to turn a collection of values into a collection of SwiftUI Views inside the body of some collection view like a List or a VStack.
You don't need to create a collection of Views here. Use a regular Swift for/in statement. Replace this:
ForEach(0..<multimediaID.count, id: \.self) { index in
with this:
for index in 0 ..< multimediaID.count {
I think you have other errors, but this one is particularly important. ForEach (like most SwiftUI types) relies heavily on type inference. Mistakes in a ForEach call can seriously confuse the Swift compiler's type inference implementation. Then the compiler often prints useless or misleading error messages. So if you replace your ForEach with for/in loop, the compiler will probably give you better messages about any other errors you have made in this code.