每当通过调用Web服务更新数组时,我都试图使用数组来显示一些游戏信息。数组填充良好,但是在运行时我得到:
通用结构'ForEachWithIndex'要求'Binding <[MatchData]>' 符合“ RandomAccessCollection”
我的ScrollView:
ScrollView{
ForEach(GameCenterHelper.helper.$MatchList, id: \.self) {row in
ext("\(row.id)")
}
}
我对数组的声明:
@State var MatchList: [MatchData] = [MatchData]()
和MatchData:
class MatchData : Identifiable {
var id: String
var LocalPlayer: Player
var RemotePlayer: Player
init(_ match: GKTurnBasedMatch) {
let local = match.participants[0].player!
let remote = match.participants[1].player ?? GKPlayer()
self.id = match.matchID
LocalPlayer = Player(Alias: local.alias
, DisplayName: local.displayName
, TeamPlayerId: local.teamPlayerID
, PlayerId: local.gamePlayerID
)
RemotePlayer = Player(Alias: remote.alias
, DisplayName: remote.displayName
, TeamPlayerId: remote.teamPlayerID
, PlayerId: remote.gamePlayerID
)
}
}
我必须承认,这是我第一次使用状态来尝试刷新ScrollView,但是我发现它比我想象的要难得多,而且我不确定代码中出了什么问题。< / p>
答案 0 :(得分:0)
您无需绑定即可迭代MatchList
中的ForEach
,直接访问
ScrollView{
ForEach(GameCenterHelper.helper.MatchList, id: \.self) {row in // << no $
ext("\(row.id)")
}
}