从数组循环时将标签分配给UIButton

Question

如何在数组中的循环中为 UIButton 分配唯一标签：

var buttonArray: NSMutableArray = ["one", "two", "Three"] // it is a mutable array but for illustration purposes only I put this....
for btnName in buttonArray {

    let button = UIButton(frame: CGRectMake(0,0,100,100))

    button.layer.masksToBounds = true
    button.layer.cornerRadius = 20
    button.setTitle("\(btnName)", forState: UIControlState.Normal)

    //button.tag = ??????

    print(button.tag)

}

Answer 1

或者，您可以使用enumerate()。这将创建一个惰性序列，其中包含一对元素及其索引。

例如：

for (index, btnName) in buttonArray.enumerate() {

    let button = UIButton(frame: CGRectMake(0,0,100,100))

    ...

    button.tag = index
}

Answer 2

显然你可以注入一些计数器。

var cnt = 0
for btnName in buttonArray {
    let button = UIButton(frame: CGRectMake(0,0,100,100))
    button.tag = cnt
    cnt += 1
}