iOS SDK：如何调用电子邮件应用程序？答案

【问题标题】：iOS SDK: How to invoke E-mail application?iOS SDK：如何调用电子邮件应用程序？
【发布时间】：2023-03-19 00:43:01
【问题描述】：

我想从我的 iPad 应用程序中调用带有自定义正文文本的 iPad 电子邮件应用程序。发件人和主题将为空，我要设置的唯一参数是电子邮件的文本。我怎么能这样做？

谢谢！

【问题讨论】：

【解决方案1】：

为什么不直接在您的应用中打开电子邮件消息编辑器？

MFMailComposeViewController *mailController = [[MFMailComposeViewController alloc] init];

[mailController setSubject:@"my subject"];                  
[mailController setMessageBody:@"my message" isHTML:NO];

mailController.mailComposeDelegate = self;

UINavigationController *myNavController = [myViewController navigationController];

if ( mailController != nil ) {
    if ([MFMailComposeViewController canSendMail]){
        [myNavController presentModalViewController:mailController animated:YES];
    }
}

[mailController release];

【讨论】：

【解决方案2】：

查看 Apple 文档中的 MFMailComposeViewController。你可以这样使用它：

MFMailComposeViewController *controller=[[MFMailComposeViewController alloc]init];
controller.delegate = self;
[controller setMessageBody:<#yourBody#> isHTML:<#isHTML#>];
[self presentModalViewController:controller animated:YES];
[controller release];

不要忘记在您的.h 文件中添加#import <MessageUI/MessageUI.h>。它将调用您的委托中的方法，让您知道它何时被取消或电子邮件已发送（成功与否）。让我知道这是否适合你。

【讨论】：

【解决方案3】：

NSString *body = @"Hello Mail";
NSString *mailtoURLString = [NSString stringWithFormat:@"mailto:?body=%@", [body stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:mailtoURLString]];

或者，正如Mihai 建议的那样，看看MFMailComposeViewController，它允许您在不离开应用程序的情况下发送邮件。

【讨论】：

【解决方案4】：

以下方法用于向用户发送邮件。

-(void)sendMail:(UIImage *)image
{
    MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
    picker.mailComposeDelegate = self;

    // Set the subject of email
    [picker setSubject:@"Picture from my iPhone!"];

    // Add email addresses  
    // Notice three sections: "to" "cc" and "bcc"
    [picker setToRecipients:[NSArray arrayWithObjects:@TO mailID1",@TO mailID2", nil]];
    [picker setCcRecipients:[NSArray arrayWithObject:@"CC MailID"]];
    [picker setBccRecipients:[NSArray arrayWithObject:@"BCC Mail ID"]];

    // Fill out the email body text
    NSString *emailBody = @"I just took this picture, check it out.";

    // This is not an HTML formatted email
    [picker setMessageBody:emailBody isHTML:NO];

    // Create NSData object as PNG image data from camera image
    NSData *data = UIImagePNGRepresentation(image);

    // Attach image data to the email   
    // 'CameraImage.png' is the file name that will be attached to the email 
    [picker addAttachmentData:data mimeType:@"image/png" fileName:@"CameraImage"];

    // Show email view
    [self presentModalViewController:picker animated:YES];

    // Release picker   
    [picker release];
}

【讨论】：

【解决方案5】：

NSString *textToShare = @"http:yourmail.com/";

NSArray *objectsToShare = @[textToShare];

UIActivityViewController *activityVC = [[UIActivityViewController alloc] initWithActivityItems:objectsToShare applicationActivities:nil];

NSArray *excludeActivities = @[UIActivityTypeAirDrop,UIActivityTypeSaveToCameraRoll];

activityVC.excludedActivityTypes = excludeActivities;
[activityVC setValue:@"yourmail" forKey:@"subject"];

[self presentViewController:activityVC animated:YES completion:nil];

【讨论】：