ios - 参数标签 "(attributes:)"与 DispatchQueue 中的任何可用重载都不匹配

Question

我正在尝试使用 DispatchQueue 让游戏中的敌人移动。我尝试修复此错误，但它一直告诉我属性不匹配任何可用的重载。

 func makeAIMove() {
    let strategistTime = CFAbsoluteTimeGetCurrent()

    DispatchQueue.global(attributes: .qosUserInitiated).async { [unowned self] in

        guard let move = self.strategist.bestMoveForActivePlayer() as? Move else { return }

        let delta = CFAbsoluteTimeGetCurrent() - strategistTime

        DispatchQueue.main.async{ [unowned self] in

            self.rows[move.row][move.col].setPlayer(.choose)

            let aiTimeCeiling = 2.0

            let delay = min(aiTimeCeiling - delta, aiTimeCeiling)

            DispatchQueue.main.after(when: .now() + delay) { [unowned self] in

                self.makeMove(row: move.row, col: move.col)

            }
        }
    }

}

Answer 1

我想你想要的是 DispatchQueue.global(qos: .userInitiated);实际上，没有采用 attributes 参数的重载。