objective-c - CCCallFunc 的随机值：值未更新？

Question

你知道如何改变 flashPosX 的值吗？changeFlashPosX 中的“日志”可以正常工作，但值不会改变：

-(void)changeFlashPosX{
    CCLOG(@"change");
    flashPosX = random() % 300;
    CCLOG(@"rando : %f", flashPosX);
}

-(void)animFlash{
    CCScaleTo *to1 = [CCScaleTo actionWithDuration:.2 scale:1];
    CCScaleTo *to0 = [CCScaleTo actionWithDuration:.6 scale:0];
    CCMoveTo *moveTo = [CCMoveTo actionWithDuration:0.1 position:ccp(flashPosX, flash.position.y)];
    CCCallFunc *callChange = [CCCallFunc actionWithTarget:self selector:@selector(changeFlashPosX)];
    CCSequence *seq = [CCSequence actions:to1, to0, callChange, moveTo, nil];
    //CCAction *repeatSeq = [CCRepeatForever actionWithAction:seq];
    CCRepeatForever *repeatSeq = [CCRepeatForever actionWithAction:seq];
    [flash runAction:repeatSeq];
}

输出 ：

rando : 164.000000
change
rando : 217.000000
change
rando : 241.000000
change
rando : 75.000000

Answer 1

试试这个：

CCMoveTo *moveTo = [CCMoveTo actionWithDuration:0.1 position:ccp(random() % 300, flash.position.y)];

如果它有效，那么问题要么与flashPosX变量的范围和/或保留有关，要么与CCSequence.

另外，试试这个：

CCRepeatForever *repeatSeq = [CCRepeatForever actionWithAction:seq];