Swift PrepareForSegue EXC_BREAKPOINT

Question

我遇到运行时错误：线程1：EXC_BreakPoint（cod = EXC_I1386_BPT，子码= 0x0）

我没有在Xcode中设置任何断点。从调试器，错误是由PrepareForSegue停止一个线程“swift_dynamicCastClassUnconditional”

BarTableViewController1类

    @IBAction func solve_PressedBar(sender: AnyObject) {

        self.performSegueWithIdentifier("SolveBar", sender: sender)

    }

    override func prepareForSegue ( segue: UIStoryboardSegue, sender: AnyObject!) {
        if (segue.identifier == "SolveBar") {
            var svcBar = segue.destinationViewController as BarTableViewController2

            for items in textField1 {
                length.append((items as NSString).floatValue)
            }

            for items in textField2 {
                youngMod.append((items as NSString).floatValue)
            }

            for items in textField3 {
                diameter.append((items as NSString).floatValue)
            }

            for items in textField4 {
                forceBarWall.append((items as NSString).floatValue)
            }

            self.funcForceBarWall()

            println("variables are from TableViewController2")
            println(self.length)
            println(self.youngMod)
            println(self.forceBarWall)
            println(self.diameter)

            svcBar.length2 = self.length
            svcBar.youngMod2 = self.youngMod
            svcBar.diamter2 = self.diameter
            svcBar.forceBarWall2 = self.forceBarWall

            println("testing from bar viewcontroller1")
        }
    }
}

Answer 1

我先看看这里：

var svcBar = segue.destinationViewController as BarTableViewController2

检查故事板并确保segue确实连接到BarTableViewController2项目。有时在拖动时，我会偶然将segue连接到其他东西。