Ios 通过电子邮件从照片库发送图片

我想用相机或照片库拍摄的照片撰写一封电子邮件。但我无法打开Mail composer picker

这是我的密码：

-(void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary*)info
{
    [self dismissModalViewControllerAnimated:YES];
    UIImage* image_type=[info objectForKey:@"UIImagePickerControllerOriginalImage"];
    dataImage = UIImagePNGRepresentation(image_type);

    if([MFMailComposeViewController canSendMail])
    {
        MFMailComposeViewController *mailCont = [[MFMailComposeViewController alloc] init];
        mailCont.delegate=self;
        mailCont.mailComposeDelegate = self;        // Required to invoke mailComposeController when send
        [mailCont setSubject:@""];
        [mailCont setToRecipients:[NSArray arrayWithObject:@""]];
        [mailCont addAttachmentData:dataImage mimeType:@"image/png" fileName:@"sender_image.png"];
        [mailCont setMessageBody:@"" isHTML:NO];

        [self presentModalViewController:mailCont animated:YES];
    }
}

现在邮件选择器没有打开。警告是:

Warning: Attempt to present <MFMailComposeViewController: 0xa26b070> on <UINavigationController: 0xa22e6d0> while a presentation is in progress!

警告：在演示过程中尝试在上演示！

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如何处理此问题。

您的问题是，首先要关闭UIImagePicker，然后立即尝试将另一个视图显示为模式视图。这必须在解雇结束后进行。请尝试以下方法：

-(void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary*)info
{
    [self dismissViewControllerAnimated:YES
                             completion:^{
                                 UIImage* image_type=[info objectForKey:@"UIImagePickerControllerOriginalImage"];
                                 dataImage = UIImagePNGRepresentation(image_type);

                                 if([MFMailComposeViewController canSendMail])
                                 {
                                     MFMailComposeViewController *mailCont = [[MFMailComposeViewController alloc] init];
                                     mailCont.delegate=self;
                                     mailCont.mailComposeDelegate = self;        // Required to invoke mailComposeController when send
                                     [mailCont setSubject:@""];
                                     [mailCont setToRecipients:[NSArray arrayWithObject:@""]];
                                     [mailCont addAttachmentData:dataImage mimeType:@"image/png" fileName:@"sender_image.png"];
                                     [mailCont setMessageBody:@"" isHTML:NO];

                                     [self presentModalViewController:mailCont animated:YES];
                                 }
                             }];
}

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希望有帮助

您可以将邮件编写代码转移到一个单独的函数，并使用performSelector:withObject:afterDelay:@Adi延迟调用该函数。这不是一个最佳解决方案，因为在任意时间ε后，没有任何一个garantie会被解雇。应该在视图结束后完成。谢谢@PraveenS告诉我新的内容。。它很好用…@Filip当然。。同意。谢谢@filip。。它的效果很好。。快乐编码…）@希瓦姆甜！也许+1和公认的答案是合适的！；）