如何限制xcode iphone上的移动？(How to constraint movement on xcode iphone?)

如何限制xcode iphone上的移动？(How to constraint movement on xcode iphone?)

我有一个对象，我只想在屏幕的后半部分移动它。

我尝试了下面的代码，但它只适用于上半部分

let halfx = self.bounds.midX self.center.x = max(halfx, self.center.x) self.center.x = min(self.superview!.bounds.size.width-halfx,self.center.x) let halfy = self.bounds.midY self.center.y = max(halfy, self.center.y) self.center.y = min(self.superview!.bounds.size.width/2.0-halfy,self.center.y)

I have got an object and I only want to move it in the second half of the screen.

I tried the code below but it only works for top half

let halfx = self.bounds.midX self.center.x = max(halfx, self.center.x) self.center.x = min(self.superview!.bounds.size.width-halfx,self.center.x) let halfy = self.bounds.midY self.center.y = max(halfy, self.center.y) self.center.y = min(self.superview!.bounds.size.width/2.0-halfy,self.center.y)

最满意答案

你可以在底部创建一个容器视图，然后你可以把你的图像放在这个容器视图中。 这意味着你的图像永远不会离开它的容器。

You could create a container view thats on the bottom, then you can put your image in this container view. This means that your image can never get out of its container.