快速滚动背景

发布于 2024-11-17 15:40:45 字数 557 浏览 2 评论 0原文

我想要一个以与 UItableView 类似的方式滚动背景的游戏。我用一个计时器解决了这个问题，该计时器向上移动背景并将同一张图片的另一个副本向上移动，

if (bg1.center.y <= - self.view.bounds.size.height/2 ) {
    bg1.center = CGPointMake(bg1.center.x, 690); 
}
if (bg2.center.y <= - self.view.bounds.size.height/2 ) {
    bg2.center = CGPointMake(bg2.center.x, 690); 

bg1.center = CGPointMake(bg1.center.x, bg1.center.y - movement);
bg2.center = CGPointMake(bg2.center.x, bg2.center.y - movement);

但是我移动图片的速度越快，出现的问题就越多：背景之间出现间隙，并且移动速度越快，它们就会变得越大！移动是由在屏幕上滑动的速度定义的

有解决这个问题的想法吗？

原文

i want a game that scrolls the background in a similar way to a UItableView. I solved it with a timer that moves the background up and brings another copy of the same picture up

if (bg1.center.y <= - self.view.bounds.size.height/2 ) {
    bg1.center = CGPointMake(bg1.center.x, 690); 
}
if (bg2.center.y <= - self.view.bounds.size.height/2 ) {
    bg2.center = CGPointMake(bg2.center.x, 690); 

bg1.center = CGPointMake(bg1.center.x, bg1.center.y - movement);
bg2.center = CGPointMake(bg2.center.x, bg2.center.y - movement);

But the faster i move the pictures the more problems occur: There are appearing gaps between the backgrounds and they are getting biggiger the faster i move them! movement is defined by the speed of swiping over the screen

Any idea to solve that?

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