Swift-初始化致命错误

我正在尝试使用calculate和calculateBoundary中的函数来初始化值ViewController2。我遇到了运行时错误，如下图所示。

ViewController1

力，弹簧刚度和弹簧数目然后被传递到的用户输入的值forceView2，stiffView2和springNumView2通过prepareforsegue。

2个公共职能

public func calculate (f:[Float], s:[Float], n:NSInteger) -> [Float]

public func calculateBoundary (inout f:[Float], s:[Float], n:NSInteger) -> (forceBound1:Float, forceBound2: Float, displacement:[Float])

ViewController2

import UIKit

class ViewController2: UIViewController , UITableViewDelegate, UITableViewDataSource {

    @IBOutlet var tableview2: UITableView!

    var forceView2 = [Float]()
    var stiffView2 = [Float]()
    var springNumView2 : NSInteger = NSInteger()

    var forceB1 : Float
    var forceB2 : Float
    var SpringD : [Float]

覆盖init（）{

        if(isCheckedGlobal) {                          
            (forceB1,forceB2,SpringD) = calculateBoundary(&forceView2, stiffView2, springNumView2) }

        else {                        
        SpringD = calculate(forceView2, stiffView2, springNumView2)
        self.forceB1  = forceView2[0]
        self.forceB2 = 0.0 }

        super.init() 
    }

required init(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}
}