我的精灵从 Y 轴出来

Question

我已经创建了一个敌人在屏幕上随机移动的动作，但有时它会从 Y 轴移动出来，我该如何让精灵在移动时不会从 Y 轴出来？ ？？？

这是随机移动精灵的代码：

[敌人 runAction:[CCSequence 动作:[CCMoveBy actionWithDuration:2.0 位置:ccp(-winSize.width*0.4, 0)], [CCMoveBy actionWithDuration:randomValueBetween(1.0, 0.3) 位置：ccp（randomValueBetween（winSize.width*0.2，-winSize.width*0.2）， randomValueBetween(winSize.height*0.2, -winSize.height*0.2))], [CCDelayTime actionWithDuration:0.5], [CCMoveBy actionWithDuration:randomValueBetween(1.0, 0.3) 位置：ccp（randomValueBetween（winSize.width*0.2，-winSize.width*0.2）， randomValueBetween(winSize.height*0.2, -winSize.height*0.2))], [CCDelayTime actionWithDuration:0.5], [CCMoveBy actionWithDuration:randomValueBetween(1.0, 0.3) 位置：ccp（randomValueBetween（winSize.width*0.2，-winSize.width*0.2）， randomValueBetween(winSize.height*0.2, -winSize.height*0.2))], [CCDelayTime actionWithDuration:0.5], [CCMoveBy actionWithDuration:randomValueBetween(1.0, 0.3) 位置：ccp（randomValueBetween（winSize.width*0.2，-winSize.width*0.2）， randomValueBetween(winSize.height*0.2, -winSize.height*0.2))], [CCDelayTime actionWithDuration:0.5], [CCMoveBy actionWithDuration:randomValueBetween(1.0, 0.3) 位置：ccp（randomValueBetween（winSize.width*0.2，-winSize.width*0.2）， randomValueBetween(winSize.height*0.2, -winSize.height*0.2))], [CCDelayTime actionWithDuration:0.5], [CCMoveBy actionWithDuration:randomValueBetween(1.0, 0.3) 位置：ccp(randomValueBetween(-winSize.width*0.3,winSize.width*0.3), randomValueBetween(winSize.height*0.3, -winSize.height*0.3))], [CCDelayTime actionWithDuration:0.5], [CCMoveBy actionWithDuration:randomValueBetween(1.0, 0.3) 位置：ccp(randomValueBetween(-winSize.width*0.2,winSize.width*0.2), randomValueBetween(winSize.height*0.2, -winSize.height*0.2))], [CCDelayTime actionWithDuration:0.5], [CCMoveBy actionWithDuration:randomValueBetween(1.0, 0.3) 位置：ccp(randomValueBetween(-winSize.width*0.3,winSize.width*0.3), randomValueBetween(winSize.height*0.3, -winSize.height*0.3))], [CCDelayTime actionWithDuration:0.5], [CCMoveBy actionWithDuration:randomValueBetween(1.0, 0.3) 位置：ccp(randomValueBetween(-winSize.width*0.2,winSize.width*0.2), randomValueBetween(winSize.height*0.2, -winSize.height*0.2))], [CCDelayTime actionWithDuration:0.5], [CCMoveBy actionWithDuration:randomValueBetween(1.0, 0.3) 位置：ccp(randomValueBetween(-winSize.width*0.3,winSize.width*0.3), randomValueBetween(winSize.height*0.3, -winSize.height*0.3))], [CCDelayTime actionWithDuration:0.5], [CCMoveBy actionWithDuration:randomValueBetween(1.0, 0.3) 位置：ccp(randomValueBetween(-winSize.width*0.2,winSize.width*0.2), randomValueBetween(winSize.height*0.2, -winSize.height*0.2))], [CCDelayTime actionWithDuration:0.5], [CCMoveBy actionWithDuration:2.0 位置:ccp(-winSize.width*1.5, 0)], [CCCallFuncN actionWithTarget:self 选择器:@selector(invisNode:)], nil]];

Answer 1

您无法通过 CCMoveBy 和随机距离阻止精灵离开屏幕。随机偏移总有可能以这样的方式加起来，使精灵沿着任何轴移动很长的距离。

堆叠多个随机 CCMoveBy 动作并不能让您控制精灵最终会在哪里结束，或者它沿途移动到哪里。

您应该将序列拆分为单独的“等待和移动”序列。这样，您可以生成随机偏移，并在创建 CCMoveBy 之前将它们添加到精灵位置以测试生成的位置是否会在屏幕外。在这种情况下，请将值限制在屏幕内的某个位置。

PS：

[CCCallFuncN actionWithTarget:self selector:@selector(invisNode:)]

如果这只将精灵设置为不可见，您可以简单地用 CCHide 动作替换它。