ccc 函数中写函数

    attackOnTarget: function (atkDir, targetPos) {
        var self = this;
        let deg = cc.radiansToDegrees(cc.pAngleSigned(cc.p(0, 1), atkDir));
        let angleDivider = [0, 12, 35, 56, 79, 101, 124, 146, 168, 180];
        function getAtkSF(mag, sfAtkDirs) {
            let atkSF = null;
            for (let i = 1; i < angleDivider.length; ++i) {
                let min = angleDivider[i - 1];
                let max = angleDivider[i];
                if (mag <= max && mag > min) {
                    atkSF = sfAtkDirs[i - 1];
                    self.nextPoseSF = self.sfPostAtks[Math.floor(( i - 1 )/3)];
                    return atkSF;
                }
            }
            if (atkSF === null) {
                console.error('cannot find correct attack pose sprite frame! mag: ' + mag);
                return null;
            }
        }

        let mag = Math.abs(deg);
        if (deg <= 0) {
            this.spPlayer.node.scaleX = 1;
            this.spPlayer.spriteFrame = getAtkSF(mag, this.sfAtkDirs);
        } else {
            this.spPlayer.node.scaleX = -1;
            this.spPlayer.spriteFrame = getAtkSF(mag, this.sfAtkDirs);
        }

        let moveAction = cc.moveTo(this.atkDuration, targetPos).easing(cc.easeQuinticActionOut());
        let callback = cc.callFunc(this.onAtkFinished, this);
        this.node.runAction(cc.sequence(moveAction, callback));
        this.inputEnabled = false;
        this.isAttacking = true;
    },