ios - 使用 UIPicker 从 NSArray 获取 titleForRow - Swift

Question

我正在尝试使用下面的 UIPickerViewDelegate 从我的数组中返回对象:

var myArr = NSArray()

将对象添加到我的数组

self.myArray = NSArray(objects: "Mr", "Mrs", "Miss", "Ms", "Dr", "Master", "Rev",
            "Fr", "Atty", "Prof", "Hon")

这是我的代表

func pickerView(pickerView: UIPickerView!, titleForRow row: Int, forComponent component: Int) -> String! {
    var string = NSString(coder: self.myArray.objectAtIndex(row) as NSCoder)
    return string
}

但是这会引发异常。我该如何完成这个简单的任务？

Answer 1

完全基于您的问题，并假设没有您未提及的相关内容，摆脱编码器的东西:

func pickerView(pickerView: UIPickerView!, titleForRow row: Int, forComponent component: Int) -> String! {
    return self.myArray.objectAtIndex(row) as NSString
}

因为这是一个 swift 程序，你也不应该使用 NSArray，因为这会导致类型歧义:

var myArr = ["Mr", "Mrs", "Miss", "Ms", "Dr", "Master", "Rev",
        "Fr", "Atty", "Prof", "Hon"]

现在您的委托(delegate)方法变得更加清晰:

func pickerView(pickerView: UIPickerView!, titleForRow row: Int, forComponent component: Int) -> String! {
    return myArray[row]
}