ios 如何从 iPhone 应用程序发送邮件

How can I send mail from an iPhone application

提问by Khushi

I want to send an email from my iPhone application. I have heard that the iOS SDK doesn't have an email API. I don't want to use the following code because it will exit my application:

我想从我的 iPhone 应用程序发送电子邮件。我听说 iOS SDK 没有电子邮件 API。我不想使用以下代码，因为它会退出我的应用程序：

NSString *url = [NSString stringWithString: @"mailto:[email protected][email protected]&subject=Greetings%20from%20Cupertino!&body=Wish%20you%20were%20here!"];
[[UIApplication sharedApplication] openURL: [NSURL URLWithString: url]];

So how can I send an email from my app?

那么如何从我的应用程序发送电子邮件？

回答by PeyloW

On iOS 3.0 and later you should use the MFMailComposeViewControllerclass, and the MFMailComposeViewControllerDelegateprotocol, that is tucked away in the MessageUI framework.

在 iOS 3.0 及更高版本上，您应该使用隐藏在 MessageUI 框架中的MFMailComposeViewController类和MFMailComposeViewControllerDelegate协议。

First add the frameworkand import:

首先添加框架并导入：

#import <MessageUI/MFMailComposeViewController.h>

Then, to send a message:

然后，发送消息：

MFMailComposeViewController* controller = [[MFMailComposeViewController alloc] init];
controller.mailComposeDelegate = self;
[controller setSubject:@"My Subject"];
[controller setMessageBody:@"Hello there." isHTML:NO]; 
if (controller) [self presentModalViewController:controller animated:YES];
[controller release];

Then the user does the work and you get the delegate callback in time:

然后用户完成工作，您及时获得委托回调：

- (void)mailComposeController:(MFMailComposeViewController*)controller  
          didFinishWithResult:(MFMailComposeResult)result 
                        error:(NSError*)error;
{
  if (result == MFMailComposeResultSent) {
    NSLog(@"It's away!");
  }
  [self dismissModalViewControllerAnimated:YES];
}

Remember to check if the device is configured for sending email:

请记住检查设备是否配置为发送电子邮件：

if ([MFMailComposeViewController canSendMail]) {
  // Show the composer
} else {
  // Handle the error
}

回答by Mugunth

MFMailComposeViewControlleris the way to go after the release of iPhone OS 3.0 software. You can look at the sample codeor the tutorial I wrote.

MFMailComposeViewController是 iPhone OS 3.0 软件发布后要走的路。你可以看我写的示例代码或教程。

回答by Mugunth

A few things I'd like to add here:

我想在这里补充几点：

1. Using the mailto URL won't work in the simulator as mail.app isn't installed on the simulator. It does work on device though.

2. There is a limit to the length of the mailto URL. If the URL is larger than 4096 characters, mail.app won't launch.

3. There is a new class in OS 3.0 that lets you send an e-mail without leaving your app. See the class MFMailComposeViewController.

1. 使用 mailto URL 在模拟器中不起作用，因为 mail.app 未安装在模拟器上。不过它确实适用于设备。

2. mailto URL 的长度有限制。如果 URL 大于 4096 个字符，mail.app 将不会启动。

3. OS 3.0 中有一个新类，可以让您在不离开应用程序的情况下发送电子邮件。请参阅 MFMailComposeViewController 类。

回答by Genericrich

If you want to send email from your application, the above code is the only way to do it unless you code your own mail client (SMTP) inside your app, or have a server send the mail for you.

如果你想从你的应用程序发送电子邮件，上面的代码是唯一的方法，除非你在你的应用程序中编写自己的邮件客户端 (SMTP)，或者让服务器为你发送邮件。

For example, you could code your app to invoke a URL on your server which would send the mail for you. Then you simply call the URL from your code.

例如，您可以编写应用程序来调用服务器上的 URL，该 URL 将为您发送邮件。然后，您只需从代码中调用 URL。

Note that with the above code you can't attach anything to the email, which the SMTP client method would allow you to do, as well as the server-side method.

请注意，使用上面的代码，您不能在电子邮件中附加任何内容，SMTP 客户端方法和服务器端方法都允许您这样做。

回答by Kannan Prasad

Below code is used in my application to send email with an attachment here the attachments is an image .You can send any type of file only thing is to keep in mind is that you had to specify the correct 'mimeType'

下面的代码在我的应用程序中用于发送带有附件的电子邮件，这里的附件是一个图像。您可以发送任何类型的文件，唯一要记住的是您必须指定正确的“mimeType”

add this to your .h file

将此添加到您的 .h 文件中

#import <MessageUI/MFMailComposeViewController.h>

Add MessageUI.frameworkto your project file

将MessageUI.framework添加 到您的项目文件中

NSArray *paths = SSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);

NSString *documentsDirectory = [paths objectAtIndex:0];

NSString *getImagePath = [documentsDirectory stringByAppendingPathComponent:@"myGreenCard.png"];



MFMailComposeViewController* controller = [[MFMailComposeViewController alloc] init];
controller.mailComposeDelegate = self;
[controller setSubject:@"Green card application"];
[controller setMessageBody:@"Hi , <br/>  This is my new latest designed green card." isHTML:YES]; 
[controller addAttachmentData:[NSData dataWithContentsOfFile:getImagePath] mimeType:@"png" fileName:@"My Green Card"];
if (controller)
    [self presentModalViewController:controller animated:YES];
[controller release];

Delegate method is as shown below

委托方法如下图

  -(void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error;
{
    if (result == MFMailComposeResultSent) {
        NSLog(@"It's away!");
    }
    [self dismissModalViewControllerAnimated:YES];
}

回答by mandeep

This is the code which can help u but dont forget to include message ui framewark and include delegates method MFMailComposeViewControllerDelegate

这是可以帮助您但不要忘记包含消息 ui framewark 和包含委托方法 MFMailComposeViewControllerDelegate 的代码

-(void)EmailButtonACtion{

        if ([MFMailComposeViewController canSendMail])
        {
            MFMailComposeViewController *controller = [[MFMailComposeViewController alloc] init];
            controller.mailComposeDelegate = self;
            [controller.navigationBar setBackgroundImage:[UIImage imageNamed:@"navigation_bg_iPhone.png"] forBarMetrics:UIBarMetricsDefault];
            controller.navigationBar.tintColor = [UIColor colorWithRed:51.0/255.0 green:51.0/255.0 blue:51.0/255.0 alpha:1.0];
            [controller setSubject:@""];
            [controller setMessageBody:@" " isHTML:YES];
            [controller setToRecipients:[NSArray arrayWithObjects:@"",nil]];
            UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];
            UIImage *ui = resultimg.image;
            pasteboard.image = ui;
            NSData *imageData = [NSData dataWithData:UIImagePNGRepresentation(ui)];
            [controller addAttachmentData:imageData mimeType:@"image/png" fileName:@" "];
            [self presentViewController:controller animated:YES completion:NULL];
        }
        else{
            UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"alrt" message:nil delegate:self cancelButtonTitle:@"ok" otherButtonTitles: nil] ;
            [alert show];
        }

    }
    -(void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error
    {

        [MailAlert show];
        switch (result)
        {
            case MFMailComposeResultCancelled:
                MailAlert.message = @"Email Cancelled";
                break;
            case MFMailComposeResultSaved:
                MailAlert.message = @"Email Saved";
                break;
            case MFMailComposeResultSent:
                MailAlert.message = @"Email Sent";
                break;
            case MFMailComposeResultFailed:
                MailAlert.message = @"Email Failed";
                break;
            default:
                MailAlert.message = @"Email Not Sent";
                break;
        }
        [self dismissViewControllerAnimated:YES completion:NULL];
        [MailAlert show];
    }

回答by Evdzhan Mustafa

Swift 2.2. Adapted from Esq's answer

斯威夫特 2.2。改编自Esq 的回答

import Foundation
import MessageUI

class MailSender: NSObject, MFMailComposeViewControllerDelegate {

    let parentVC: UIViewController

    init(parentVC: UIViewController) {
        self.parentVC = parentVC
        super.init()
    }

    func send(title: String, messageBody: String, toRecipients: [String]) {
        if MFMailComposeViewController.canSendMail() {
            let mc: MFMailComposeViewController = MFMailComposeViewController()
            mc.mailComposeDelegate = self
            mc.setSubject(title)
            mc.setMessageBody(messageBody, isHTML: false)
            mc.setToRecipients(toRecipients)
            parentVC.presentViewController(mc, animated: true, completion: nil)
        } else {
            print("No email account found.")
        }
    }

    func mailComposeController(controller: MFMailComposeViewController,
        didFinishWithResult result: MFMailComposeResult, error: NSError?) {

            switch result.rawValue {
            case MFMailComposeResultCancelled.rawValue: print("Mail Cancelled")
            case MFMailComposeResultSaved.rawValue: print("Mail Saved")
            case MFMailComposeResultSent.rawValue: print("Mail Sent")
            case MFMailComposeResultFailed.rawValue: print("Mail Failed")
            default: break
            }

            parentVC.dismissViewControllerAnimated(false, completion: nil)
    }
}

Client code :

客户端代码：

var ms: MailSender?

@IBAction func onSendPressed(sender: AnyObject) {
    ms = MailSender(parentVC: self)
    let title = "Title"
    let messageBody = "https://stackoverflow.com/questions/310946/how-can-i-send-mail-from-an-iphone-application this question."
    let toRecipents = ["[email protected]"]
    ms?.send(title, messageBody: messageBody, toRecipents: toRecipents)
}

回答by Patrick R

To send an email from iPhone application you need to do below list of task.

要从 iPhone 应用程序发送电子邮件，您需要执行以下任务列表。

Step 1: Import #import <MessageUI/MessageUI.h>In your controller class where you want to send an email.

第 1 步：导入#import <MessageUI/MessageUI.h>在您要发送电子邮件的控制器类中。

Step 2: Add the delegate to your controller like shown below

第 2 步：将委托添加到您的控制器中，如下所示

 @interface <yourControllerName> : UIViewController <MFMessageComposeViewControllerDelegate, MFMailComposeViewControllerDelegate>

Step 3: Add below method for send email.

第 3 步：添加以下发送电子邮件的方法。

 - (void) sendEmail {
 // Check if your app support the email.
 if ([MFMailComposeViewController canSendMail]) {
    // Create an object of mail composer.
    MFMailComposeViewController *mailComposer =      [[MFMailComposeViewController alloc] init];
    // Add delegate to your self.
    mailComposer.mailComposeDelegate = self;
    // Add recipients to mail if you do not want to add default recipient then remove below line.
    [mailComposer setToRecipients:@[<add here your recipient objects>]];
    // Write email subject.
    [mailComposer setSubject:@“<Your Subject Here>”];
    // Set your email body and if body contains HTML then Pass “YES” in isHTML.
    [mailComposer setMessageBody:@“<Your Message Body>” isHTML:NO];
    // Show your mail composer.
    [self presentViewController:mailComposer animated:YES completion:NULL];
 }
 else {
 // Here you can show toast to user about not support to sending email.
}
}

Step 4: Implement MFMailComposeViewController Delegate

第 4 步：实现 MFMailComposeViewController 委托

- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(nullable NSError *)error {
[controller dismissViewControllerAnimated:TRUE completion:nil];


switch (result) {
   case MFMailComposeResultSaved: {
    // Add code on save mail to draft.
    break;
}
case MFMailComposeResultSent: {
    // Add code on sent a mail.
    break;
}
case MFMailComposeResultCancelled: {
    // Add code on cancel a mail.
    break;
}
case MFMailComposeResultFailed: {
    // Add code on failed to send a mail.
    break;
}
default:
    break;
}
}

回答by brian.clear

Swift 2.0

斯威夫特 2.0

func mailComposeController(controller: MFMailComposeViewController, didFinishWithResult result: MFMailComposeResult, error: NSError?){
    if let error = error{
        print("Error: \(error)")
    }else{
        //NO Error
        //------------------------------------------------
        var feedbackMsg = ""

        switch result.rawValue {
        case MFMailComposeResultCancelled.rawValue:
            feedbackMsg = "Mail Cancelled"
        case MFMailComposeResultSaved.rawValue:
            feedbackMsg = "Mail Saved"
        case MFMailComposeResultSent.rawValue:
            feedbackMsg = "Mail Sent"
        case MFMailComposeResultFailed.rawValue:
            feedbackMsg = "Mail Failed"
        default:
            feedbackMsg = ""
        }

        print("Mail: \(feedbackMsg)")

        //------------------------------------------------
    }
}

回答by Esqarrouth

Heres a Swift version:

这是一个 Swift 版本：

import MessageUI

class YourVC: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        if MFMailComposeViewController.canSendMail() {
            var emailTitle = "Vea Software Feedback"
            var messageBody = "Vea Software! :) "
            var toRecipents = ["[email protected]"]
            var mc:MFMailComposeViewController = MFMailComposeViewController()
            mc.mailComposeDelegate = self
            mc.setSubject(emailTitle)
            mc.setMessageBody(messageBody, isHTML: false)
            mc.setToRecipients(toRecipents)
            self.presentViewController(mc, animated: true, completion: nil)
        } else {
            println("No email account found")
        }
    }
}

extension YourVC: MFMailComposeViewControllerDelegate {
    func mailComposeController(controller: MFMailComposeViewController!, didFinishWithResult result: MFMailComposeResult, error: NSError!) {
        switch result.value {
        case MFMailComposeResultCancelled.value:
            println("Mail Cancelled")
        case MFMailComposeResultSaved.value:
            println("Mail Saved")
        case MFMailComposeResultSent.value:
            println("Mail Sent")
        case MFMailComposeResultFailed.value:
            println("Mail Failed")
        default:
            break
        }
        self.dismissViewControllerAnimated(false, completion: nil)
    }
}

Source

来源