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. }
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. }
24. //点击按钮后，触发这个方法
25. -(void)sendEMail
26. {
27. Class mailClass = (NSClassFromString(@"MFMailComposeViewController"));
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];
50. mailPicker.mailComposeDelegate = self;
52. //设置主题
53. [mailPicker setSubject: @"eMail主题"];
55. // 添加发送者
56. NSArray *toRecipients = [NSArray arrayWithObject: @"first@example.com"];
57. //NSArray *ccRecipients = [NSArray arrayWithObjects:@"second@example.com", @"third@example.com", nil];
58. //NSArray *bccRecipients = [NSArray arrayWithObject:@"fourth@example.com", nil];
59. [mailPicker setToRecipients: toRecipients];
60. //[picker setCcRecipients:ccRecipients];
61. //[picker setBccRecipients:bccRecipients];
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"];
69. NSString *emailBody = @"eMail 正文";
70. [mailPicker setMessageBody:emailBody isHTML:YES];
72. [self presentModalViewController: mailPicker animated:YES];
73. [mailPicker release];
74. }
75. -(void)launchMailAppOnDevice
76. {
77. NSString *recipients = @"mailto:first@example.com&subject=my email!";
78. //@"mailto:first@example.com?cc=second@example.com,third@example.com&subject=my email!";
79. NSString *body = @"&body=email body!";
81. NSString *email = [NSString stringWithFormat:@"%@%@", recipients, body];
82. email = [email stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];
84. [[UIApplication sharedApplication] openURL: [NSURL URLWithString:email]];
85. }
86. - (void)mailComposeController:(MFMailComposeViewController *)controller
87. didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
88. {
89. NSString *msg;
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. }
112. [self dismissModalViewControllerAnimated:YES];
113. }