MFMailComposeViewController出現第二個，然後消失

Question

我也做了MFMailComposeViewController（通常的設立）按斯威夫特指南

https://developer.apple.com/library/prerelease/ios/documentation/MessageUI/Reference/MFMailComposeViewController_class/

但是當我跑這則出現在電子郵件的一瞬間，消失並收到錯誤消息「MailCompositionService意外退出」。

這裏是完整的代碼

import Foundation 
import UIKit 
import MessageUI 

class ViewController: UIViewController, MFMailComposeViewControllerDelegate { 

@IBAction func showEmail(sender: AnyObject) { 

    let composeVC = MFMailComposeViewController() 
    composeVC.mailComposeDelegate = self 
    // Configure the fields of the interface. 
    composeVC.setToRecipients(["address@example.com"]) 
    composeVC.setSubject("Hello!") 
    composeVC.setMessageBody("Hello from California!", isHTML: false) 

    // Present the view controller modally. 
    self.presentViewController(composeVC, animated: true, completion: nil) 
} 

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") 
    case MFMailComposeResultFailed.rawValue: 
     print("Mail sent failure: \(error!.localizedDescription)") 
    default: 
     break 
    } 
    controller.dismissViewControllerAnimated(true, completion: nil) 
}} 

Answer 1

這是在Xcode模擬器一個已知的bug。它應該在你的設備上正常工作。

Answer 2

您的代碼是正確的。僅在device中才能在iOS simulator中測試MFMailComposeViewController組件。

如果你看這Thread在Apple Developer Forums該問題有Apple Bug Report門票，但仍然沒有任何修復。