MFMailComposeViewController发送邮件的实例

1. 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.  
2. 项目中需要添加MessageUi.framework。头文件加入MFMailComposeViewControllerDelegate。#import <MessageUI/MessageUI.h>  
3. sendMailViewController.m文件的实现：  
4. - (void)viewDidLoad  
5. {  
6.     UIButton *button = [UIButton buttonWithType: UIButtonTypeRoundedRect];  
7.     button.frame = CGRectMake(0, 40, 320, 50);  
8.     [button setTitle: @"Mail" forState: UIControlStateNormal];  
9.     [button addTarget: self action: @selector(sendEMail) forControlEvents: UIControlEventTouchUpInside];  
10.     [self.view addSubview: button];  
11. }  
12.   
13. - (void) alertWithTitle: (NSString *)_title_ msg: (NSString *)msg   
14. {  
15.     UIAlertView *alert = [[UIAlertView alloc] initWithTitle:_title_   
16.                                                     message:msg   
17.                                                    delegate:nil   
18.                                           cancelButtonTitle:@"确定"   
19.                                           otherButtonTitles:nil];  
20.     [alert show];  
21.     [alert release];  
22. }   
23.   
24. //点击按钮后，触发这个方法  
25. -(void)sendEMail   
26. {  
27.     Class mailClass = (NSClassFromString(@"MFMailComposeViewController"));  
28.       
29.     if (mailClass != nil)  
30.     {  
31.         if ([mailClass canSendMail])  
32.         {  
33.             [self displayComposerSheet];  
34.         }   
35.         else   
36.         {  
37.             [self launchMailAppOnDevice];  
38.         }  
39.     }   
40.     else   
41.     {  
42.         [self launchMailAppOnDevice];  
43.     }      
44. }  
45. //可以发送邮件的话  
46. -(void)displayComposerSheet   
47. {  
48.     MFMailComposeViewController *mailPicker = [[MFMailComposeViewController alloc] init];  
49.       
50.     mailPicker.mailComposeDelegate = self;  
51.       
52.     //设置主题  
53.     [mailPicker setSubject: @"eMail主题"];  
54.       
55.     // 添加发送者  
56.     NSArray *toRecipients = [NSArray arrayWithObject: @"[email protected]"];  
57.     //NSArray *ccRecipients = [NSArray arrayWithObjects:@"[email protected]", @"[email protected]", nil];  
58.     //NSArray *bccRecipients = [NSArray arrayWithObject:@"[email protected]", nil];  
59.     [mailPicker setToRecipients: toRecipients];  
60.     //[picker setCcRecipients:ccRecipients];      
61.     //[picker setBccRecipients:bccRecipients];  
62.       
63.     // 添加图片  
64.     UIImage *addPic = [UIImage imageNamed: @"123.jpg"];  
65.     NSData *imageData = UIImagePNGRepresentation(addPic);            // png  
66.     // NSData *imageData = UIImageJPEGRepresentation(addPic, 1);    // jpeg  
67.     [mailPicker addAttachmentData: imageData mimeType: @"" fileName: @"123.jpg"];  
68.       
69.     NSString *emailBody = @"eMail 正文";  
70.     [mailPicker setMessageBody:emailBody isHTML:YES];  
71.       
72.     [self presentModalViewController: mailPicker animated:YES];  
73.     [mailPicker release];  
74. }  
75. -(void)launchMailAppOnDevice  
76. {  
77.     NSString *recipients = @"mailto:[email protected]&subject=my email!";  
78.     //@"mailto:[email protected][email protected],[email protected]&subject=my email!";  
79.     NSString *body = @"&body=email body!";  
80.       
81.     NSString *email = [NSString stringWithFormat:@"%@%@", recipients, body];  
82.     email = [email stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];  
83.       
84.     [[UIApplication sharedApplication] openURL: [NSURL URLWithString:email]];  
85. }  
86. - (void)mailComposeController:(MFMailComposeViewController *)controller   
87.           didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error   
88. {  
89.     NSString *msg;  
90.       
91.     switch (result)   
92.     {  
93.         case MFMailComposeResultCancelled:  
94.             msg = @"邮件发送取消";  
95.             break;  
96.         case MFMailComposeResultSaved:  
97.             msg = @"邮件保存成功";  
98.             [self alertWithTitle:nil msg:msg];  
99.             break;  
100.         case MFMailComposeResultSent:  
101.             msg = @"邮件发送成功";  
102.             [self alertWithTitle:nil msg:msg];  
103.             break;  
104.         case MFMailComposeResultFailed:  
105.             msg = @"邮件发送失败";  
106.             [self alertWithTitle:nil msg:msg];  
107.             break;  
108.         default:  
109.             break;  
110.     }  
111.       
112.     [self dismissModalViewControllerAnimated:YES];  
113. }