线程1：信号SIGABRT错误

Question

我正在开发一个应用程序，您点击一个按钮，它会发送一条已填写的短信，每当我点击该按钮时，都会显示错误...

我导入了messageUI框架并添加了MFMessageComposeViewControllerDelegate类。

@IBAction func sendMessage(sender: AnyObject) {
    var messageVC = MFMessageComposeViewController()

    messageVC.body = "Enter a message";
    messageVC.recipients = ["Enter tel-nr"]
    messageVC.messageComposeDelegate = self;

    self.presentViewController(messageVC, animated: false, completion: nil)
}

func messageComposeViewController(controller: MFMessageComposeViewController!, didFinishWithResult result: MessageComposeResult) {
    switch (result.value) {
    case MessageComposeResultCancelled.value:
        println("Message was cancelled")
        self.dismissViewControllerAnimated(true, completion: nil)
    case MessageComposeResultFailed.value:
        println("Message failed")
        self.dismissViewControllerAnimated(true, completion: nil)
    case MessageComposeResultSent.value:
        println("Message was sent")
        self.dismissViewControllerAnimated(true, completion: nil)
    default:
        break;
    }
}

Answer 1

您确定要测试的设备是否可以发送消息？模拟器没有文本消息功能。试试这个：

@IBAction func sendMessage(sender: AnyObject) {
    if MFMessageComposeViewController.canSendText() == false {
        println("Cannot send text")
        return
    }

    var messageVC = MFMessageComposeViewController()

    messageVC.body = "Enter a message";
    messageVC.recipients = ["Enter tel-nr"]
    messageVC.messageComposeDelegate = self;

    self.presentViewController(messageVC, animated: false, completion: nil)
}