Swift : 随机化视图中的 UIButton 位置

Question

我有一个 UIView，我希望它出现在设备宽度和高度范围内的随机位置。我还希望 Y 位置不低于 20pts。这是我所做的，但 UIView 有时会出现在屏幕外或部分出现在屏幕外：

superDab = SuperDabButton(frame:CGRectMake(CGFloat(arc4random_uniform(UInt32((self.view?.frame.size.width)! - (superDabImage!.size.width)))),
            (CGFloat(arc4random_uniform(UInt32((self.view?.frame.size.height)! - (superDabImage!.size.height))))),
            (superDabImage!.size.width),
            (superDabImage!.size.height)),
            time: 5.0)
        self.view?.addSubview(superDab!)

请帮忙！谢谢！

Answer 1

通过这样做得到它的工作并且可以应用于具有相同概念的任何东西：

var xPos = CGFloat()
var yPos = CGFloat()

//Finds random CGFloat within the width and height
xPos = (CGFloat(arc4random_uniform(UInt32((self.view?.frame.size.width)!))))
yPos = (CGFloat(arc4random_uniform(UInt32((self.view?.frame.size.height)!))))

//If statements saying that if the x pos is larger than the width - the size of the button, 
then do modulus on it using the equation below 
if (xPos > ((self.view?.bounds.width)! - (self.view?.bounds.width)! * 0.20)){
    xPos = xPos % ((self.view?.bounds.width)! - (self.view?.bounds.width)! * 0.20)}
if (yPos > ((self.view?.bounds.height)! - (self.view?.bounds.width)! * 0.20)){
    yPos = yPos % ((self.view?.bounds.height)! - (self.view?.bounds.width)! * 0.20)}

//Note: I use the "- (self.view?.bounds.width)! * 0.20" for the ypos only because 
my button is a circle, so most likely others would use the height instead of width

Swift : 随机化视图中的 UIButton 位置

Swift : Randomize UIButton Position within View

location

position

uiview

swift