如何从iPhone应用程序发送邮件

我想用我的iPhone应用程序发送一封电子邮件。我听说iOS SDK没有电子邮件API。我不想使用下面的代码，因为它将退出我的应用程序:

NSString *url = [NSString stringWithString: @"mailto:foo@example.com?cc=bar@example.com&subject=Greetings%20from%20Cupertino!&body=Wish%20you%20were%20here!"];
[[UIApplication sharedApplication] openURL: [NSURL URLWithString: url]];

那么我如何从我的应用程序发送电子邮件呢?

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小开

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内编写自己的邮件客户端(SMTP)，或者有一个服务器为你发送邮件。

例如，你可以编写你的应用程序来调用服务器上的URL，它会为你发送邮件。然后只需从代码中调用URL。

请注意，使用上面的代码，您不能向电子邮件附加任何内容，而SMTP客户端方法和服务器端方法允许您这样做。

小开

这里我想补充几点:

  1. 使用mailto URL在模拟器中不能作为邮件工作。应用程序未安装在模拟器上。但它在设备上确实有效。

  2. mailto URL的长度有限制。如果URL大于4096个字符，请发送邮件。应用程序无法启动。

  3. OS 3.0中有一个新类，可以让你在不离开应用程序的情况下发送电子邮件。请看类MFMailComposeViewController。

小开

MFMailComposeViewController是iPhone OS 3.0软件发布后的方式。你可以查看示例代码或我写的教程。

小开

在ios3.0及以后的版本中，你应该使用隐藏在MessageUI框架中的MFMailComposeViewController类和MFMailComposeViewControllerDelegate协议。

首先添加框架并导入:

#import <MessageUI/MFMailComposeViewController.h>

然后，发送一个消息:

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];

然后用户完成工作，你及时得到委托回调:

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

记得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
}
小开

下面的代码用于我的应用程序发送带有附件的电子邮件，这里的附件是一个图像。你可以发送任何类型的文件，唯一要记住的是你必须指定正确的“mimeType”

将此添加到.h文件中

#import <MessageUI/MFMailComposeViewController.h>

将MessageUI.framework添加到项目文件中

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];

委托方法如下所示

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

这是可以帮助你的代码，但不要忘记包括消息ui framewark和包括委托方法MFMailComposeViewControllerDelegate

-(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];
}
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以下是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 = ["pj@veasoftware.com"]
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 .

小开

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)")


//------------------------------------------------
}
}
小开

斯威夫特2.2。改编自先生的回答

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)
}
}

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 = ["foo@bar.com"]
ms?.send(title, messageBody: messageBody, toRecipents: toRecipents)
}
小开

从iPhone应用程序发送电子邮件，你需要做下面的任务列表。

步骤1:进口#import <MessageUI/MessageUI.h>在你想要发送电子邮件的控制器类中。

步骤2:添加委托到您的控制器如下所示

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

步骤3: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.
}
}

步骤4:实现MFMailComposeViewController Delegate

- (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;
}
}
小开
我写了一个简单的包装器叫KRNSendEmail，简化了发送电子邮件到一个方法调用 KRNSendEmail被很好地记录并添加到CocoaPods中。 < br > < br > https://github.com/ulian-onua/KRNSendEmail < / p >

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