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swiftuiviewpositionlocation

Swift : Randomize UIButton Position within View

I have a UIView that i want to appear in a random location within the width and height of the device. I also want the Y location to not be below 20pts. Here is what I've done, but the UIView sometimes appears off the screen or partially off the screen: 

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!)

Please help! Thank you!

Solution

  • Got this to work by doing this and can be applied to anything with the same concept:

    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