Obj-C帮助解决块中的保留周期

Question

我有一个BaseUnit类，它有一个方法 - (void)attackUnit:(__weak BaseUnit *)unit 它在一个循环中攻击另一个单位的地方。

当只有一个单位攻击一切都很好并且死单位被解除分配时，但当两个用户互相攻击时，没有人会被永久解除分配。我很确定我在这里有一个保留周期。

我在这个方法中有一个块，它被调用直到敌人用户没有死（是的...因为他从未解除分配:)）

我尝试使用“弱强舞”，但仍然没有运气

这是我的代码：

- (void)attackUnit:(__weak BaseUnit *)unit
{
    [self removeAllActions];
    [_unitNode removeAllActions];

    if (_unitType == ERangedUnit)
    {
        __weak typeof(self) weakSelf = self;
        __weak typeof(unit) weakUnit = unit;
        __weak typeof (self.parent) wekaSelfParent = self.parent;

        SKAction * action = [SKAction runBlock:^
                             {
                                 __strong typeof(weakUnit) refUnit = weakUnit;
                                 __strong typeof(weakSelf) refSelf = weakSelf;

                                 if ([refUnit isDead])
                                 {
                                     NSLog(@"Attacking Dead Unit ");
                                 }
                                 if ([refUnit isDead] || !unit)
                                 {
                                     [refSelf removeAllActions];
                                     [refSelf->_unitNode removeAllActions];

                                     refSelf->_state = EUnitResting;
                                 }
                                 else
                                 {

                                     __strong typeof(wekaSelfParent) refSelfParent = wekaSelfParent;

                                     SKSpriteNode * projectile = [[ProjectileNode alloc]initWithTexture:_projectile.texture bitmask:_projectile.physicsBody.contactTestBitMask];
                                     [projectile setScale:0.5];
                                     [refSelfParent addChild:projectile];

                                     CGPoint target = [refUnit.parent convertPoint:refUnit.position toNode:refSelfParent];
                                     [projectile setPosition:refSelf.position];

                                     [projectile setZRotation:AngleBetween(projectile.position, target)];

                                     CGFloat time = EuclidianDistance(target, refSelf.position)/400;
                                     [projectile runAction:[SKAction moveTo:target duration:time] completion:^
                                    {
                                        [projectile removeFromParent];
                                    }];
                                 //_state = EUnitResting;
                                 }
                             }];
        [_unitNode runAction:[SKAction repeatActionForever:[SKAction sequence:@[_attackSpeedDelay, _attackBackAction, action]]]];
    }

    _state = EUnitAttacking;
}

当projectile命中一个单位时，此代码执行：

- (void)onHitBy:(__weak SKNode *)hitNode
{
    _currHp --;
    //Play some action.


    CGFloat hpFillHeight = CalculateHpFrame(_currHp, _hitPoints, _hpNodeSize.height);
    [_hpFillNode runAction:[SKAction resizeToHeight:hpFillHeight duration:0.2]];

    if (_currHp <= 0)
    {
        _isDead = YES;
        [_unitNode removeAllActions];
        [self removeAllActions];
        [self.delegate unitIsDead:self];

        [self runAction:[SKAction removeFromParent]];
    }
}

CGFloat CalculateHpFrame(CGFloat value, CGFloat hpMax, CGFloat heightMax)
{
    CGFloat retVal;
    value = (value)/hpMax;
    retVal = value * heightMax;
    if (retVal<0)
    {
        retVal = 0;
    }
    return retVal;
}

使用仪器进行分析显示以下结果：