IOS自带Email的两种方法实例详解

-(void)launchMailApp  {     NSMutableString *mailUrl = [[[NSMutableString alloc]init]autorelease];    //添加收件人    NSArray *toRecipients = [NSArray arrayWithObject: @"first@example.com"];    [mailUrl appendFormat:@"mailto:%@", [toRecipients componentsJoinedByString:@","]];    //添加抄送    NSArray *ccRecipients = [NSArray arrayWithObjects:@"second@example.com", @"third@example.com", nil];     [mailUrl appendFormat:@"?cc=%@", [ccRecipients componentsJoinedByString:@","]];    //添加密送    NSArray *bccRecipients = [NSArray arrayWithObjects:@"fourth@example.com", nil];     [mailUrl appendFormat:@"&bcc=%@", [bccRecipients componentsJoinedByString:@","]];    //添加主题    [mailUrl appendString:@"&subject=my email"];    //添加邮件内容    [mailUrl appendString:@"&body=<b>email</b> body!"];    NSString* email = [mailUrl stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];     [[UIApplication sharedApplication] openURL: [NSURL URLWithString:email]];   }  

//  // ViewController.h  // MailDemo  //  // Created by LUOYL on 12-4-4.  // Copyright (c) 2012年 http://luoyl.info. All rights reserved.  //   #import <UIKit/UIKit.h>  #import <MessageUI/MFMailComposeViewController.h>   @interface ViewController : UIViewController<MFMailComposeViewControllerDelegate>   @end 

#pragma mark - 在应用内发送邮件  //激活邮件功能  - (void)sendMailInApp  {    Class mailClass = (NSClassFromString(@"MFMailComposeViewController"));    if (!mailClass) {      [self alertWithMessage:@"当前系统版本不支持应用内发送邮件功能，您可以使用mailto方法代替"];      return;    }    if (![mailClass canSendMail]) {      [self alertWithMessage:@"用户没有设置邮件账户"];      return;    }    [self displayMailPicker];  }   //调出邮件发送窗口  - (void)displayMailPicker  {    MFMailComposeViewController *mailPicker = [[MFMailComposeViewController alloc] init];     mailPicker.mailComposeDelegate = self;         //设置主题     [mailPicker setSubject: @"eMail主题"];     //添加收件人    NSArray *toRecipients = [NSArray arrayWithObject: @"first@example.com"];    [mailPicker setToRecipients: toRecipients];     //添加抄送    NSArray *ccRecipients = [NSArray arrayWithObjects:@"second@example.com", @"third@example.com", nil];     [mailPicker setCcRecipients:ccRecipients];       //添加密送    NSArray *bccRecipients = [NSArray arrayWithObjects:@"fourth@example.com", nil];     [mailPicker setBccRecipients:bccRecipients];         // 添加一张图片     UIImage *addPic = [UIImage imageNamed: @"Icon@2x.png"];     NSData *imageData = UIImagePNGRepresentation(addPic);      // png      //关于mimeType：http://www.iana.org/assignments/media-types/index.html    [mailPicker addAttachmentData: imageData mimeType: @"" fileName: @"Icon.png"];       //添加一个pdf附件    NSString *file = [self fullBundlePathFromRelativePath:@"高质量C++编程指南.pdf"];    NSData *pdf = [NSData dataWithContentsOfFile:file];    [mailPicker addAttachmentData: pdf mimeType: @"" fileName: @"高质量C++编程指南.pdf"];      NSString *emailBody = @"<font color='red'>eMail</font> 正文";     [mailPicker setMessageBody:emailBody isHTML:YES];     [self presentModalViewController: mailPicker animated:YES];     [mailPicker release];   }   #pragma mark - 实现 MFMailComposeViewControllerDelegate  - (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error  {    //关闭邮件发送窗口    [self dismissModalViewControllerAnimated:YES];    NSString *msg;     switch (result) {       case MFMailComposeResultCancelled:         msg = @"用户取消编辑邮件";         break;       case MFMailComposeResultSaved:         msg = @"用户成功保存邮件";         break;       case MFMailComposeResultSent:         msg = @"用户点击发送，将邮件放到队列中，还没发送";         break;       case MFMailComposeResultFailed:         msg = @"用户试图保存或者发送邮件失败";         break;       default:         msg = @"";        break;     }     [self alertWithMessage:msg];  }