弃用Swift C样式循环后循环中的递减索引，应该如何使用

Posted 2023-02-04 ShineYangGod

方法一

for i in (0 ..< 5).reversed() 
    print(i) // 4,3,2,1,0


let array = ["a", "b", "c", "d", "e"]
for element in array.reversed() 
    print(element) // e,d,c,b,a


array.reversed().forEach  print($0)  // e,d,c,b,a

print(Array(array.reversed())) // e,d,c,b,a

方法二

for index in stride(from: 10, to: 0, by: -1) 
    print(index)


// You can also use stride condition like
// Some Value.stride(to: 0, by: -1)
// for index in 10.stride(to: 0, by: -1)