int数组转化成string数组(swift)

• 方法1:

let nums = [1,2,3,4,5,6,7]
var strs = [String]()
for var i = 0; i < nums.count; ++i {
    strs.append(String(nums[i]))
}

• 方法2:

let nums = [1,7]
let strs = nums.map(String.init)

• result:

["1","2","3","4","5","6","7"]