ios - Swift 每隔一个项目追加到数组

Question

我有一个快速数组“Monthdata”，我想在我的月份数组中每隔一个值 append 一次。

var monthData = []
let months = ["Jul 12","Aug 12","Sep 12","Oct 12"]

for month in months {
 self.monthData.append(month)
}

所以基本上我的 monthData 数组看起来像:

["Aug 12","Oct 12"]

Answer 1

尝试使用取模运算符(%)

var monthData = Array<String>()
let months = ["Jul 12","Aug 12","Sep 12","Oct 12"]

var i : Int = 1

for month in months{
    if(i%2 == 0){
        monthData.append(month)
    }
    i = i + 1
}

println(monthData)

输出:

[Aug 12, Oct 12]