swift:如何从1到3个项目中随机删除?
我的代码只随机删除一枚硬币。我如何从1到3枚硬币中随机取出swift:如何从1到3个项目中随机删除?,swift,random,hidden,arc4random,Swift,Random,Hidden,Arc4random,我的代码只随机删除一枚硬币。我如何从1到3枚硬币中随机取出 @IBAction func endTurn(sender: UIButton!) { if coins.count > 0 { // @IBOutlet var coins: [UIButton]! (21 coins) let index: Int = Int(arc4random_uniform(UInt32(coins.count))) coins[index].hidden = t
@IBAction func endTurn(sender: UIButton!) {
if coins.count > 0 { // @IBOutlet var coins: [UIButton]! (21 coins)
let index: Int = Int(arc4random_uniform(UInt32(coins.count)))
coins[index].hidden = true
self.coins.removeAtIndex(index)
if coins.isEmpty {
println("GameOver")
}
}
}
试试这个
let numberToDelete = Int(arc4random_uniform(UInt32(3))) + 1
for i in 0..<numberToDelete{
let indexToDelete = Int(arc4random_uniform(UInt32(coins.count)))
coins.removeAtIndex(indexToDelete)
if coins.isEmpty{
break;
}
}
if coins.isEmpty{
println("GameOver")
}
let numberToDelete=Int(arc4random_uniform(UInt32(3)))+1
对于0中的i..对于随机数,我建议使用此扩展名:
extension Int {
static func random(range: Range<Int> ) -> Int {
var offset = 0
if range.startIndex < 0 {
offset = abs(range.startIndex)
}
let min = UInt32(range.startIndex + offset)
let max = UInt32(range.endIndex + offset)
return Int(min + arc4random_uniform(max - min)) - offset
}
}
在1和3之间随机选择一个for循环调用你的代码?这里已经回答了注意:使用arc4random而不是rand这很好,恭喜。但是我认为如果range.startIndex<0{
var i = Int.random(1...5)