无法将图像附加到应用内短信

Question

我有一个简单的应用程序，它会截取部分屏幕截图，然后通过短信发送生成的图像。

在弹出的 SMS 对话窗口中附加到 SMS 的图像不是我通过屏幕截图捕获的图像 - 这是一个“空白”图像。

这是我的代码：

@IBAction func smsScreenShot(sender: AnyObject) {

    // Declare the snapshot boundaries

    let top: CGFloat = 100
    let bottom: CGFloat = 60

    // The size of the cropped image
    let size = CGSize(width: view.frame.size.width, height: view.frame.size.height - top - bottom)

    // Start the context
    UIGraphicsBeginImageContext(size)

    // use context in a couple of places
    let context = UIGraphicsGetCurrentContext()!

    // Transform the context so that anything drawn into it is displaced "top" pixels up
    CGContextTranslateCTM(context, 0, -top)

    // Draw the view into the context (this is the snapshot)
    view.layer.renderInContext(context)

    let snapshot = UIGraphicsGetImageFromCurrentImageContext()

    // End the context (this is required to not leak resources)
    UIGraphicsEndImageContext()


    // Composing the SMS
    if !MFMessageComposeViewController.canSendText() {
        print("SMS services are not available")
    }

    if (MFMessageComposeViewController.canSendText()) {

        let composeVC = MFMessageComposeViewController()
        composeVC.messageComposeDelegate = self

        composeVC.recipients = []
        composeVC.body = "Have a look at this image!!";

        // Attaching the image to the SMS.
        let image = snapshot
        let imageData = UIImagePNGRepresentation(image)
        composeVC.addAttachmentData(imageData!, typeIdentifier: "image/png", filename:"my image")
        self.presentViewController(composeVC, animated: true, completion: nil)

    }
}

我已经研究了几个小时，看不出哪里出错了。

我有相同的代码来将附件添加到应用内电子邮件中，控制器中存在明显差异，并且工作正常。只是不适用于应用内短信。

谢谢！

Answer 1

改变这一行：-

composeVC.addAttachmentData(imageData!, typeIdentifier: "image/png", filename:"my image")

到这里：-

 composeVC.addAttachmentData(imageData!, typeIdentifier: "image/png", filename:"myimage.png")

你去！