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 UIKit
class ViewController: UIViewController,UIActionSheetDelegate{
@IBOutlet var button:UIButton
override 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)
}
