MFMailComposeViewController发送邮件的实例

 
 
 iPhone API已经提供了系统写邮件界面的接口,使用MFMailComposeViewController，用来显示界面.  
项目中需要添加MessageUi.framework。头文件加入MFMailComposeViewControllerDelegate。
#import <MessageUI/MessageUI.h>  
 
  sendMailViewController.m文件的实现：  
  1. - (void)viewDidLoad  
  2. {  
  3.     UIButton *button = [UIButton buttonWithType: UIButtonTypeRoundedRect];  
  4.     button.frame = CGRectMake(0, 40, 320, 50);  
  5.     [button setTitle: @"Mail" forState: UIControlStateNormal];  
  6.     [button addTarget: self action: @selector(sendEMail) forControlEvents: UIControlEventTouchUpInside];  
  7.     [self.view addSubview: button];  
  8. }  
  9.   
  10. - (void) alertWithTitle: (NSString *)_title_ msg: (NSString *)msg   
  11. {  
  12.     UIAlertView *alert = [[UIAlertView alloc] initWithTitle:_title_   
  13.                                                     message:msg   
  14.                                                    delegate:nil   
  15.                                           cancelButtonTitle:@"确定"   
  16.                                           otherButtonTitles:nil];  
  17.     [alert show];  
  18.     [alert release];  
  19. }   
  20.   
  21. //点击按钮后，触发这个方法  
  22. -(void)sendEMail   
  23. {  
  24.     Class mailClass = (NSClassFromString(@"MFMailComposeViewController"));  
  25.       
  26.     if (mailClass != nil)  
  27.     {  
  28.         if ([mailClass canSendMail])  
  29.         {  
  30.             [self displayComposerSheet];  
  31.         }   
  32.         else   
  33.         {  
  34.             [self launchMailAppOnDevice];  
  35.         }  
  36.     }   
  37.     else   
  38.     {  
  39.         [self launchMailAppOnDevice];  
  40.     }      
  41. }  
  42. //可以发送邮件的话  
  43. -(void)displayComposerSheet   
  44. {  
  45.     MFMailComposeViewController *mailPicker = [[MFMailComposeViewController alloc] init];  
  46.       
  47.     mailPicker.mailComposeDelegate = self;  
  48.       
  49.     //设置主题  
  50.     [mailPicker setSubject: @"eMail主题"];  
  51.       
  52.     // 添加发送者  
  53.     NSArray *toRecipients = [NSArray arrayWithObject: @"first@example.com"];  
  54.     //NSArray *ccRecipients = [NSArray arrayWithObjects:@"second@example.com", @"third@example.com", nil];  
  55.     //NSArray *bccRecipients = [NSArray arrayWithObject:@"fourth@example.com", nil];  
  56.     [mailPicker setToRecipients: toRecipients];  
  57.     //[picker setCcRecipients:ccRecipients];      
  58.     //[picker setBccRecipients:bccRecipients];  
  59.       
  60.     // 添加图片  
  61.     UIImage *addPic = [UIImage imageNamed: @"123.jpg"];  
  62.     NSData *imageData = UIImagePNGRepresentation(addPic);            // png  
  63.     // NSData *imageData = UIImageJPEGRepresentation(addPic, 1);    // jpeg  
  64.     [mailPicker addAttachmentData: imageData mimeType: @"" fileName: @"123.jpg"];  
  65.       
  66.     NSString *emailBody = @"eMail 正文";  
  67.     [mailPicker setMessageBody:emailBody isHTML:YES];  
  68.       
  69.     [self presentModalViewController: mailPicker animated:YES];  
  70.     [mailPicker release];  
  71. }  
  72. -(void)launchMailAppOnDevice  
  73. {  
  74.     NSString *recipients = @"mailto:first@example.com&subject=my email!";  
  75.     //@"mailto:first@example.com?cc=second@example.com,third@example.com&subject=my email!";  
  76.     NSString *body = @"&body=email body!";  
  77.       
  78.     NSString *email = [NSString stringWithFormat:@"%@%@", recipients, body];  
  79.     email = [email stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];  
  80.       
  81.     [[UIApplication sharedApplication] openURL: [NSURL URLWithString:email]];  
  82. }  
  83. - (void)mailComposeController:(MFMailComposeViewController *)controller   
  84.           didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error   
  85. {  
  86.     NSString *msg;  
  87.       
  88.     switch (result)   
  89.     {  
  90.         case MFMailComposeResultCancelled:  
  91.             msg = @"邮件发送取消";  
  92.             break;  
  93.         case MFMailComposeResultSaved:  
  94.             msg = @"邮件保存成功";  
  95.             [self alertWithTitle:nil msg:msg];  
  96.             break;  
  97.         case MFMailComposeResultSent:  
  98.             msg = @"邮件发送成功";  
  99.             [self alertWithTitle:nil msg:msg];  
  100.             break;  
  101.         case MFMailComposeResultFailed:  
  102.             msg = @"邮件发送失败";  
  103.             [self alertWithTitle:nil msg:msg];  
  104.             break;  
  105.         default:  
  106.             break;  
  107.     }  
  108.       
  109.     [self dismissModalViewControllerAnimated:YES];  
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原文地址：https://www.cnblogs.com/daguo/p/2621963.html