Swift PrepareForSegue EXC_BREAKPOINT

Question

我有一个运行时错误：线程 1：EXC_BreakPoint(cod=EXC_I1386_BPT,subcode=0x0)

我没有在里面设置任何断点Xcode。在调试器中，错误是由于 PrepareForSegue 停止线程 "swift_dynamicCastClassUnconditional"

BarTableViewController1 Class

    @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

我先看这里：

var svcBar = segue.destinationViewController as BarTableViewController2

检查您的情节提要并确保 segue 确实连接到 BarTableViewController2 项目。有时在拖动时，我会不小心将 segue 连接到其他东西。

Swift PrepareForSegue EXC_BREAKPOINT

Swift PrepareForSegue EXC_BREAKPOINT

xcode

ios7

swift