How to make a UIImageView repeat forever across the screen [x-axis]

Question

I am developing a game on xCode, but I ran into a problem. I was able to make the UIImageView move <------- left across the iPhone screen, but it I want it to repeat as soon as it begins to move so it could look endless.

Lets say that one piece of the floor in that app is a UIImageView , how can I make that UIImageView repeat across the screen [x-axis] as shown in that app. [NOT MY APP]

-(void)whiteFloor{
    whiteFloor.center = CGPointMake(whiteFloor.center.x-1);   
    if(whiteFloor.center.x < 130){
        [self placeGround];
    }
}

-(void)placeGround {
    // Also would I need to make a int?
    //what would write here
}

Answer 1

我敢肯定，如果您使用SpriteKit，有更好的方法，但是如果您不想使用它，则可以一个接一个地使用2个UIImageView来创建无尽的效果。