在iPhone的MessageUI中使用MFMailComposeViewController从应用程序发送电子邮件

我是一名软件开发人员，我正在为电子邮件制作一个应用程序，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];  
}  

//头文件
//导入MessageUI框架
#进口
//将委托功能添加到类（）
@接口教程ProjectViewController:UIViewController{
}  
-（iAction）按主按钮解除功能：（id）发送者
//实现文件
-（iAction）按MailButtonDudeFunction:（id）发送方{
//分配新消息生成器窗口
MFMailComposeViewController*mc=[[MFMailComposeViewController alloc]init]；
//将委托方法设置为“self”
mc.mailComposeDelegate=self；
//预填充消息主题
[mc setSubject:@“给我发个消息”]；
//以纯文本形式添加邮件内容
[mc setMessageBody:@“如果您喜欢本教程，请向我发送消息：）”isHTML:否]；
//将邮件内容添加为HTML
[mc setMessageBody:@“如果您喜欢本教程，请向我发送消息：）“isHTML:是的]；
//添加收件人
[mc setToRecipients:[NSArray arrayWithObjects:@“Fuerte”，@”info@xprogress.com“，无]]；
//将发送副本的收件人添加到（arrayWithObject或arrayWithObjects）
[mc setCcRecipients:[NSArray arrayWithObject:@”test@example.com"]];  
//添加隐藏收件人
[mc SetBCRecipients:[NSArray arrayWithObject:@”test@example.com"]];  
//添加图像附件
//获取我们在教程项目中拥有的图像的路径
NSString*path=[[NSBundle mainBundle]pathForResource:@“png”类型的“Extra_Xcode_100x100”；
//将图像内容加载到NSData中
NSData*imageData=[NSData dataWithContentsOfFile:path]；
//将附件添加到邮件中
[mc addAttachmentData:imageData mimeType:@“image/png”文件名：@“Collection”]；
//设置不同于模态视图控制器的默认转换
[mc SetModAltTransitionStyle:UIModAltTransitionStyleCrossDissolve]；
/* 
模态视图控制器转换：
UIModalTransitionStyleCoverVertical=>从底部弹出，默认转换
UIModalTransitionStyleCrossBluse=>在屏幕上淡入淡出
UIModalTransitionStyleFlipHorizontal=>页面翻转
*/  
//在屏幕上显示我们的模态视图控制器（当然，如果您想看到任何转换，必须将动画设置为“是”）
[自我呈现模式控制器：mc动画：是]；
//释放控制器
[mc发布]；
}  
//委托函数回调
-（void）mailComposeController:（MFMailComposeViewController*）控制器未完成结果：（MFMailComposeResult）结果错误：（NSError*）错误{
//切换结果
开关（结果）{
案例MFMailComposer结果已取消：
NSLog（@“邮件发送已取消”）；
/* 
在此处执行已取消事件的代码。。。
*/  
打破
案例MFMailComposer结果已保存：
NSLog（@“邮件已保存”）；
/* 
在此处执行电子邮件保存事件的代码。。。
*/  
打破
案例MFMailComposer结果已发送：
NSLog（@“已发送邮件”）；
/* 
在此处执行电子邮件发送事件的代码。。。
*/  
打破
案例MFMailComposer结果失败：
NSLog（@“邮件发送错误：%@.”，[error localizedDescription]）；
/* 
在此处执行电子邮件发送失败事件的代码。。。
*/  
打破
违约：
打破
}  
//隐藏模态视图控制器
[自我解散Modalviewcontrolleranimated:是]；
}  

我没有得到正确的答案。。。这是正确的密码吗

确保已将MessageUI框架包含到iOS项目中。在Xcode 4中，您可以通过在左列中选择项目来包含框架。然后选择选项卡“构建阶段”。在这里，你可以点击“链接二进制与库”左边的箭头，你会看到已经包含在你的应用程序中的框架列表。如果缺少MessageUI.framework，只需将其添加到那里即可

你发布的代码看起来像一个完整的教程代码被剪掉了。。。所以只使用你需要的代码。。。并逐步为其添加更多功能。通过这种方式，您将看到在哪里添加了错误代码行。也许你的应用程序包中没有图像“Extra_Xcode_100x100.png”

因此，这里有一个“最小”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];  

}

---

我也有同样的问题，每次在发送消息时运行应用程序，它都会崩溃；我发现如果我移除

[mc setToRecipients:[NSArray arrayWithObjects:@]首先。address@test.com“，@”秒。address@test.com“，无]]

它工作正常，只要求我提供电子邮件地址。
要从应用发送电子邮件，您的设备应配置电子邮件服务

// 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");
    }
}

它显示了太多我无法理解的错误。它显示了“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。它还显示了“邮件发送已取消”，“邮件已保存”，“邮件已发送”同时…我还将“导入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。请尝试将数组结尾设置为[NSNull null]，因为当需要对象时，nil不能作为结尾。这是弧前的事
#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];

}