Question

我是一个快速的新手，相信我，我已经搜索并寻找答案了。我想创建UISliders，从Swift中的一组数字中获取它们的值。它是一个相机应用程序，因此示例数组应该是显而易见的。

@IBAction func isoValueChanged(sender: UISlider) {
    let isoArray = ["24", "32", "50","64","80","100","125","160","200","250","320","400","500","640","720","800","1000","1250","1600","1800"] // available iPhone 6s ISO settings I believe
    let currentValue = // What do I need?
    isoText.text = "\(currentValue)"
}

更难以表示1/1000 - 32的快门速度！从我看到的那里，这不是一个简单的，因为没有数学表示从数组中计算。它甚至可能吗？

Answer 1

我不太确定我明白你想要的是什么，但我猜这是对的。

// Global Variable or something like this (accessible from multiple functions)
let isoArray = ["24", "32", "50","64","80","100","125","160","200","250","320","400","500","640","720","800","1000","1250","1600","1800"] // available iPhone 6s ISO settings I believe

func functionThatCreatesTheSliderYo(...) {
    slider.minimumValue = 0
    slider.maximumValue = isoArray.count
    slider.continuous = false
}

@IBAction func isoValueChanged(sender: UISlider) {
    // instead of Int(val) you may want to round(val) for a better UI
    let currentValue = isoArray[Int(sender.value)]
    isoText.text = "\(currentValue)"
}

Answer 2

这对我有用

    @IBAction func isoValueChanged(sender: UISlider) {
    let isoArray = ["24", "32", "50","64","80","100","125","160","200","250","320","400","500","640","720","800","1000","1250","1600","1800"]
    let currentValue = isoArray[Int(sender.value)]
    isoText.text = "\(currentValue)"

}

在Swift中应该如此简单。非常感谢Ty。一定要看看聊天。

Swift UISlider从一组数字中获取其值

2 个答案: