如何在Swift中找到数组中的多个峰和谷元素？

func findPeaksAndValleys(in array: [Int]) -> (peaks: [Int], valleys: [Int]) {
    var peaks = [Int]()
    var valleys = [Int]()
    
    for i in 1..<array.count-1 {
        if array[i] > array[i-1] && array[i] > array[i+1] {
            peaks.append(array[i])
        } else if array[i] < array[i-1] && array[i] < array[i+1] {
            valleys.append(array[i])
        }
    }
    
    return (peaks, valleys)
}

// 示例用法
let array = [1, 3, 2, 4, 5, 1, 6, 2]
let result = findPeaksAndValleys(in: array)
print("峰元素：\(result.peaks)")
print("谷元素：\(result.valleys)")

峰元素：[3, 5, 6]
谷元素：[2, 1]