ios – 尝试在Swift中初始化UIActionSheet时的EXC_BAD_ACCESS

概述我的程序编译成功,但是当我按下按钮时,它会崩溃.这是viewController. swift： import UIKitclass ViewController: UIViewController, UIActionSheetDelegate{@IBOutlet var button:UIButtonoverride func viewDidLoad() { super.vi 我的程序编译成功,但是当我按下按钮时,它会崩溃.这是vIEwController. swift：

import UIKitclass VIEwController: UIVIEwController,UIActionSheetDelegate{@IBOutlet var button:UIbuttonoverrIDe func vIEwDIDLoad() {    super.vIEwDIDLoad()    // Do any additional setup after loading the vIEw,typically from a nib.}overrIDe func dIDReceiveMemoryWarning() {    super.dIDReceiveMemoryWarning()    // dispose of any resources that can be recreated.}@IBAction func buttonpressed(AnyObject) {    let choice = UIActionSheet(Title: "Select source",delegate: self,cancelbuttonTitle: "Cancel",destructivebuttonTitle: nil,otherbuttonTitles:"camera","libary")    choice.showInVIEw(self.vIEw)}}

错误出现在这一行：

let choice = UIActionSheet(Title: "Select source","library")

这是错误文本：

EXC_BAD_ACCESS(代码= 2,地址= 0x0)

我试图将let切换到var,在不同的模拟器上运行它,但结果是一样的.

解决方法 试过,但无法弄清楚异常.最后我得到了这样的解决方案：

var myActionSheet:UIActionSheet = UIActionSheet()        var Title : String? = "Select Source"        myActionSheet.Title  = Title        myActionSheet.delegate = self        myActionSheet.addbuttonWithTitle("camera")        myActionSheet.addbuttonWithTitle("library")        myActionSheet.addbuttonWithTitle("Cancel")        myActionSheet.cancelbuttonIndex = 2         myActionSheet.showInVIEw(self.vIEw)

UIActionSheet代表

func actionSheet(myActionSheet: UIActionSheet!,clickedbuttonAtIndex buttonIndex: Int){        println("the index is %d",buttonIndex)    }

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