ios - 将 UITextField 添加到代码作为 socket 时发出 Sigabrt 信号

Question

一旦我通过“控制拖动”将 2 个文本字段连接到我的代码，我就无法进入 View ，因为它只是退出来给我

Thread 1: SIGNAL Sigabrt

应用程序运行，但一旦我打开这些文本框所在的页面，我的应用程序就会失败。我在另一个应用程序上使用完全相同的代码进行了完全相同的设置，但没有收到错误，我的代码如下:

import UIKit
import MessageUI

class ContactPage: UIViewController, MFMailComposeViewControllerDelegate {

    override func prefersStatusBarHidden() -> Bool {
        return true;
    }

    var alert = UIAlertView()

    @IBOutlet var Name: UITextField!
    @IBOutlet var Message: UITextField!

    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 MakeCall(sender: AnyObject) {
        self.alert.title = "Calling Now..."
        self.alert.message = "You call will comence soon."
        self.alert.addButtonWithTitle("Ok")
        self.alert.show()
        let url:NSURL = NSURL(string: "tel://0394172817")!
        UIApplication.sharedApplication().openURL(url)
    }

    @IBAction func email(sender: AnyObject) {

        if (MFMailComposeViewController.canSendMail()) {

            let SubjectText = ""
            let MessageBody = ""
            let toRecipients = ["test@test.com"]

            let mc: MFMailComposeViewController = MFMailComposeViewController()
            mc.mailComposeDelegate = self
            mc.setSubject(SubjectText)
            mc.setMessageBody(MessageBody, isHTML: false)
            mc.setToRecipients(toRecipients)

            self.presentViewController(mc, animated: true, completion: nil)

        } else {
            print("No email account found")
        }
    }

    @IBAction func Submit(sender: AnyObject) {

        if (MFMailComposeViewController.canSendMail()) {

            let SubjectText = Name
            let MessageBody = Message
            let toRecipients = ["test@test.com"]

            let mc: MFMailComposeViewController = MFMailComposeViewController()
            mc.mailComposeDelegate = self
            mc.setSubject(SubjectText.text!)
            mc.setMessageBody(MessageBody.text!, isHTML: false)
            mc.setToRecipients(toRecipients)

            self.alert.title = "Registration Form"
            self.alert.message = "On this screen please press send."
            self.alert.addButtonWithTitle("Ok")
            self.alert.show()

            self.presentViewController(mc, animated: true, completion: nil)

        } else {
            print("No email account found")
        }
    }

    func mailComposeController(controller: MFMailComposeViewController, didFinishWithResult result: MFMailComposeResult, error: NSError?) {

        switch result.rawValue {

            case MFMailComposeResultCancelled.rawValue:
                print("Mail Cancelled")
            case MFMailComposeResultSaved.rawValue:
                print("Mail Saved")
            case MFMailComposeResultSent.rawValue:
                print("Mail Sent")
                self.alert.title = "Contact Form"
                self.alert.message = "Your form has been sent."
                self.alert.addButtonWithTitle("Ok")
                self.alert.show()
            case MFMailComposeResultFailed.rawValue:
                print("Mail Failed")
                self.alert.title = "Contact Form"
                self.alert.message = "Your form failed to be sent. Please check your internet connection and try again"
                self.alert.addButtonWithTitle("Ok")
                self.alert.show()
            default:
                break
        }

        self.dismissViewControllerAnimated(false, completion: nil)

        self.performSegueWithIdentifier("ShowHome", sender: self)
    }
}

我还将添加错误代码:

2015-09-01 12:02:43.976 App Name[91111:2205337] Unknown class ContactPage in Interface Builder file. 
2015-09-01 12:02:44.078 App Name[91111:2205337] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIViewController 0x7ff781d0a110> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key Message.'
*** First throw call stack:
(
  0   CoreFoundation                      0x00000001051a99b5 __exceptionPreprocess + 165
  1   libobjc.A.dylib                     0x00000001071ffdeb objc_exception_throw + 48
  2   CoreFoundation                      0x00000001051a95f9 -[NSException raise] + 9
  3   Foundation                          0x0000000105573fdb -[NSObject(NSKeyValueCoding) setValue:forKey:] + 288
  4   UIKit                               0x0000000105f9c418 -[UIViewController setValue:forKey:] + 88
  5   UIKit                               0x00000001061af2c7 -[UIRuntimeOutletConnection connect] + 109
  6   CoreFoundation                      0x00000001050ea590 -[NSArray makeObjectsPerformSelector:] + 224
  7   UIKit                               0x00000001061adcaa -[UINib instantiateWithOwner:options:] + 1864
  8   UIKit                               0x0000000105fa2df4 -[UIViewController _loadViewFromNibNamed:bundle:] + 381
  9   UIKit                               0x0000000105fa3720 -[UIViewController loadView] + 178
  10  UIKit                               0x0000000105fa3a22 -[UIViewController loadViewIfRequired] + 138
  11  UIKit                               0x0000000105fa4054 -[UIViewController view] + 27
  12  UIKit                               0x00000001066d36d2 -[_UIFullscreenPresentationController _setPresentedViewController:] + 87
  13  UIKit                               0x0000000105f74a4e -[UIPresentationController initWithPresentedViewController:presentingViewController:] + 133
  14  UIKit                               0x0000000105fb65ca -[UIViewController _presentViewController:withAnimationController:completion:] + 3736
  15  UIKit                               0x0000000105fb94b3 -[UIViewController presentViewController:animated:completion:] + 343
  16  UIKit                               0x00000001064eee8b __67-[UIStoryboardModalSegueTemplate newDefaultPerformHandlerForSegue:]_block_invoke + 243
  17  UIKit                               0x00000001064dd523 -[UIStoryboardSegueTemplate _perform:] + 449
  18  UIKit                               0x00000001064dd5ea -[UIStoryboardSegueTemplate perform:] + 156
  19  UIKit                               0x0000000105e1f522 -[UIApplication sendAction:to:from:forEvent:] + 92
  20  UIKit                               0x0000000105f7ec06 -[UIControl sendAction:to:forEvent:] + 67
  21  UIKit                               0x0000000105f7eeac -[UIControl _sendActionsForEvents:withEvent:] + 273
  22  UIKit                               0x0000000105f7e008 -[UIControl touchesEnded:withEvent:] + 601
  23  UIKit                               0x0000000105e8715f -[UIWindow _sendTouchesForEvent:] + 835
  24  UIKit                               0x0000000105e87d4d -[UIWindow sendEvent:] + 865
  25  UIKit                               0x0000000105e3c2ae -[UIApplication sendEvent:] + 263
  26  UIKit                               0x0000000105e1836c _UIApplicationHandleEventQueue + 6693
  27  CoreFoundation                      0x00000001050d5b21 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
  28  CoreFoundation                      0x00000001050cba4c __CFRunLoopDoSources0 + 556
  29  CoreFoundation                      0x00000001050caf03 __CFRunLoopRun + 867
  30  CoreFoundation                      0x00000001050ca918 CFRunLoopRunSpecific + 488
  31  GraphicsServices                    0x000000010acdcad2 GSEventRunModal + 161
  32  UIKit                               0x0000000105e1d99e UIApplicationMain + 171
  33  App Name                     0x0000000104fa749d main + 109
  34  libdyld.dylib                       0x0000000107d6492d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb) 

如果可能的话尽可能详细地解释一下，我对 swift 和 Xcode 很陌生，并且有点不确定一切是如何运行的。提前致谢。

Answer 1

如果您在查看 ContactPage 文件时查看实用程序导航器，则目标成员资格选择是否正确？

如果未选择目标成员资格，则编译的二进制文件将不包含 ContactPage。

如果目标成员资格选择正确，请在 Interface Builder 中仔细检查模块是否指向您的应用程序，而不是类名下方的“None”。

最后，使用 cmd+k 清理您的项目。这也可以解决一些损坏的依赖关系。