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我正在开发 iPhone 应用程序的一部分,您可以在其中使用 iPhone 3.0 中的应用程序内邮件发送图像。从相机胶卷中选择图像效果很好,但是当我尝试从相机转到电子邮件时(即 - 从 UIImagePickerController 到 MFMailComposeViewController),应用程序崩溃了。

这是运行相机的代码:

- (BOOL)startCameraPickerFromViewController:(UIViewController*)controller usingDelegate:(id<UIImagePickerControllerDelegate, UINavigationControllerDelegate>)delegateObject 
{
    if ( (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) || (delegateObject == nil) || (controller == nil)) 
        return NO;
    UIImagePickerController* picker = [[UIImagePickerController alloc] init];
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    picker.delegate = delegateObject;
    picker.allowsImageEditing = NO;
    [controller presentModalViewController:picker animated:YES];
    return YES;
}

这是使用相机完成的代码:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo
{
    NSLog(@"Called finish picking");
    self.imageForSending = theImage;

    //   NSData *imageData = UIImageJPEGRepresentation(image, 1);

    [[picker parentViewController] dismissModalViewControllerAnimated:YES];
    [(ChannelTwoAppDelegate *) [[UIApplication sharedApplication] delegate] recoverNavigationBar];

    [self performSelector:@selector(sendEmail) withObject:nil afterDelay:0.45];
    [picker release];
}

这是发送邮件的代码:

- (void) sendEmail {

    [(ChannelTwoAppDelegate *) [[UIApplication sharedApplication] delegate] hideNavigationBar];
    if (![MFMailComposeViewController canSendMail])
    {
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"שגיאה", @"") message:NSLocalizedString(@"לא ניתן לשלוח מייל ממכשיר זה", @"")
                                                       delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
        [alert show];   
        [alert release];
    }
    else
    {
        MFMailComposeViewController *controller = [[MFMailComposeViewController alloc] init];
        controller.mailComposeDelegate = self;
        [[controller navigationBar] setTintColor:[UIColor colorWithRed:120.0/255.0 green:0 blue:0 alpha:1.0]];
        NSData *imageData = UIImageJPEGRepresentation(imageForSending, 1);
        [controller addAttachmentData:imageData mimeType:@"image/jpg" fileName:@"storyImage.jpg"];
        [controller setSubject:@""];
        [controller setToRecipients:[NSArray arrayWithObject:@""]];
        [self presentModalViewController:controller animated:YES];
        [controller release];
    }

}

我删除了电子邮件地址和主题,因为它不太相关。

崩溃发生在电子邮件的 presentModalViewController 上。再次 - 从相机胶卷中选择图像时,这个确切的代码完美地工作......

帮助 ?我已经和这个打了一段时间了,真的可以使用一些新的输入。谢谢!

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1 回答 1

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嗨,任何观看的人,我找到了自己问题的答案。它是两个模态视图控制器的呈现之间的时间问题

基本上,我已经知道这是一个问题,但是,我没有等待足够长的时间。等待时间足以从相机胶卷中选择图像,但不足以从相机中返回。

[self performSelector:@selector(sendEmail) withObject:nil afterDelay:0.45];

变成 :

[self performSelector:@selector(sendEmail) withObject:nil afterDelay:1.0];

我还添加了一个 UIActivityIndi​​cator 来指示用户正在发生某些事情。

快乐编码!

于 2009-09-21T09:16:41.427 回答