在 iPhone 上的 MessageUI 中使用 MFMailComposeViewController 从应用程序发送电子邮件
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【中文标题】在 iPhone 上的 MessageUI 中使用 MFMailComposeViewController 从应用程序发送电子邮件【英文标题】：Sending email message from the app using MFMailComposeViewController in MessageUI on iPhone 【发布时间】：2011-04-25 09:03:46 【问题描述】：我是一名软件开发人员，我正在为电子邮件制作应用程序，我有以下代码：
// Header file
// importing the MessageUI framework
#import <MessageUI/MessageUI.h>
// adding the delegate functionality to the class (<MFMailComposeViewControllerDelegate>)
@interface TutorialProjectViewController : UIViewController <MFMailComposeViewControllerDelegate>
- (IBAction)pressTheMailButtonDudeFunction:(id)sender
// Implementation file
- (IBAction)pressTheMailButtonDudeFunction:(id)sender
// allocatind new message composer window
MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init];
// setting a delegate method to "self"
mc.mailComposeDelegate = self;
// pre-populating the message subject
[mc setSubject:@"Send me a message"];
// adding content of the message as a plain text
[mc setMessageBody:@"Send me a message is you like this tutorial :)" ishtml:NO];
// adding content of the message as an HTML
[mc setMessageBody:@"<p>Send me a message is you like this tutorial :)<p>" isHTML:YES];
// adding recipients
[mc setToRecipients:[NSArray arrayWithObjects:@"Fuerte <info@fuerte.cz>", @"info@xprogress.com", nil]];
// adding recipients for a send copy to (arrayWithObject or arrayWithObjects)
[mc setCcRecipients:[NSArray arrayWithObject:@"test@example.com"]];
// adding hidden recipients
[mc setBccRecipients:[NSArray arrayWithObject:@"test@example.com"]];
// adding image attachment
// getting path for the image we have in the tutorial project
NSString *path = [[NSBundle mainBundle] pathForResource:@"Extra_Xcode_100x100" ofType:@"png"];
// loading content of the image into NSData
NSData *imageData = [NSData dataWithContentsOfFile:path];
// adding the attachment to he message
[mc addAttachmentData:imageData mimeType:@"image/png" fileName:@"Collection"];
// setting different than the default transition for the modal view controller
[mc setModalTransitionStyle:UIModalTransitionStyleCrossDissolve];
/*
Modal view controllers transitions:
UIModalTransitionStyleCoverVertical => pops up from the bottom, default transition
UIModalTransitionStyleCrossDissolve => fade on the screen
UIModalTransitionStyleFlipHorizontal => page flip
*/
// displaying our modal view controller on the screen (of course animated has to be set on YES if you want to see any transition)
[self presentModalViewController:mc animated:YES];
// releasing the controller
[mc release];
// delegate function callback
- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
// switchng the result
switch (result)
case MFMailComposeResultCancelled:
NSLog(@"Mail send canceled.");
/*
Execute your code for canceled event here ...
*/
break;
case MFMailComposeResultSaved:
NSLog(@"Mail saved.");
/*
Execute your code for email saved event here ...
*/
break;
case MFMailComposeResultSent:
NSLog(@"Mail sent.");
/*
Execute your code for email sent event here ...
*/
break;
case MFMailComposeResultFailed:
NSLog(@"Mail send error: %@.", [error localizedDescription]);
/*
Execute your code for email send failed event here ...
*/
break;
default:
break;
// hide the modal view controller
[self dismissModalViewControllerAnimated:YES];
而且我没有得到正确的答案...这是正确的代码吗？
【问题讨论】：
它显示了太多我无法理解的错误。它显示“邮件发送已取消。”、“邮件已保存。”、“邮件已发送。”同时 请详细说明您的问题。 @Nick Weaver：它显示了太多我无法理解的错误。它显示“邮件发送已取消。”、“邮件已保存。”、“邮件已发送。”同时... 我也将 MessageUI 框架“导入”到我的项目中，但我仍然无法得到答案 请详细说明您面临的确切问题。 【参考方案1】：-
确保将 MessageUI 框架包含到您的 ios 项目中。在 Xcode 4 中，您可以通过在左栏中选择您的项目来包含该框架。然后选择选项卡“构建阶段”。在这里，您可以单击“Link Binary With Libraries”左侧的箭头，您会看到已包含在您的应用程序中的框架列表。如果 MessageUI.framework 缺失 - 只需在此处添加即可。
您发布的代码看起来像是截断的完整教程代码...所以只使用您需要的代码...并逐步添加更多功能。这样，您将看到添加错误代码行的位置。可能您的 app bundle 中没有图片“Extra_Xcode_100x100.png”。
所以，这是一个“最小”的 MFMailComposeViewController：
- (IBAction)showMinimalModalMailView:(id)sender
// get a new new MailComposeViewController object
MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init];
// his class should be the delegate of the mc
mc.mailComposeDelegate = self;
// set a mail subject ... but you do not need to do this :)
[mc setSubject:@"This is an optional mail subject!"];
// set some basic plain text as the message body ... but you do not need to do this :)
[mc setMessageBody:@"This is an optional message body plain text!" isHTML:NO];
// set some recipients ... but you do not need to do this :)
[mc setToRecipients:[NSArray arrayWithObjects:@"first.address@test.com", @"second.address@test.com", nil]];
// displaying our modal view controller on the screen with standard transition
[self presentModalViewController:mc animated:YES];
// be a good memory manager and release mc, as you are responsible for it because your alloc/init
[mc release];
【讨论】：
【参考方案2】：我遇到了同样的问题，每次在发送消息时运行应用程序都会崩溃；我发现如果我删除了
[mc setToRecipients:[NSArray arrayWithObjects:@"first.address@test.com", @"second.address@test.com", nil]];
它工作正常，只是询问我的电子邮件地址。
【讨论】：
尝试以 [NSNull null] 结尾的数组，因为 nil 不能是预期对象的结尾。这是弧前的事情【参考方案3】：要从应用程序发送电子邮件，您的设备应配置为电子邮件服务。
// importing the MessageUI framework
#import <MessageUI/MessageUI.h>
// adding the delegate functionality to the class (<MFMailComposeViewControllerDelegate>)
@interface ViewController : UIViewController <MFMailComposeViewControllerDelegate>
- (IBAction)sendEMailClick:(id)sender
//check mail service is configure to your device or not.
if ([MFMailComposeViewController canSendMail])
// get a new new MailComposeViewController object
MFMailComposeViewController * composeVC = [MFMailComposeViewController new];
// his class should be the delegate of the composeVC
[composeVC setDelegate:self];
// set a mail subject ... but you do not need to do this :)
[composeVC setSubject:@"This is an optional mail subject!"];
// set some basic plain text as the message body ... but you do not need to do this :)
[composeVC setMessageBody:@"This is an optional message body plain text!" isHTML:NO];
// set some recipients ... but you do not need to do this :)
[composeVC setToRecipients:[NSArray arrayWithObjects:@"first.address@test.com", @"second.address@test.com", nil]];
// Present the view controller modally.
[self presentViewController:composeVC animated:true completion:nil];
else
NSLog(@"Mail services are not available or configure to your device");
在电子邮件发送或取消后点击MFMailComposeViewControllerDelegate 的MFMailComposeViewController 委托方法被调用，因此您可以在此处查看电子邮件发送状态。
#pragma mark - MFMailComposeViewControllerDelegate Methode.
- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(nullable NSError *)error
switch (result)
case MFMailComposeResultCancelled:
NSLog(@"Mail cancelled");
break;
case MFMailComposeResultSaved:
NSLog(@"Mail saved");
break;
case MFMailComposeResultSent:
NSLog(@"Mail sent");
break;
case MFMailComposeResultFailed:
NSLog(@"Mail sent failure: %@",error.description);
break;
// Dismiss the mail compose view controller.
[controller dismissViewControllerAnimated:true completion:nil];
【讨论】：
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