IOS发送Email的方法

IOS系统框架提供的两种发送Email的方法：openURL 和 MFMailComposeViewController。借助这两个方法，我们可以轻松的在应用里加入如用户反馈这类需要发送邮件的功能。

 

1.openURL

使用openURL调用系统邮箱客户端是我们在IOS3.0以下实现发邮件功能的主要手段。我们可以通过设置url里的相关参数来指定邮件的内容，不过其缺点很明显，这样的过程会导致程序暂时退出。下面是使用openURL来发邮件的一个小例子：

#pragma mark - 使用系统邮件客户端发送邮件   -(void)launchMailApp   {         NSMutableString *mailUrl = [[[NSMutableString alloc]init]autorelease];       //添加收件人       NSArray *toRecipients = [NSArray arrayWithObject: @"[e-mail]"];       [mailUrl appendFormat:@"mailto:%@", [toRecipients componentsJoinedByString:@","]];       //添加抄送       NSArray *ccRecipients = [NSArray arrayWithObjects:@"[e-mail]", @"[e-mail]", nil];         [mailUrl appendFormat:@"?cc=%@", [ccRecipients componentsJoinedByString:@","]];       //添加密送       NSArray *bccRecipients = [NSArray arrayWithObjects:@"[e-mail]", 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]];     }  

 缺点很明显，这样的过程会导致程序暂时退出，即使在iOS 4.x支持多任务的情况下，这样的过程还是会让人觉得不是很方便。

 

2.MFMailComposeViewController

MFMailComposeViewController是在IOS3.0新增的一个接口，它在MessageUI.framework中。通过调用MFMailComposeViewController，可以把邮件发送窗口集成到我们的应用里，发送邮件就不需要退出程序了。MFMailComposeViewController的使用方法：

• 1.项目中引入MessageUI.framework；
• 2.在使用的文件中导入MFMailComposeViewController.h头文件；
• 3.实现MFMailComposeViewControllerDelegate，处理邮件发送事件；
• 4.调出邮件发送窗口前先使用MFMailComposeViewController里的“+ (BOOL)canSendMail”方法检查用户是否设置了邮件账户；
• 5.初始化MFMailComposeViewController，构造邮件体

 

//   //  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: @"[e-mail]"];       [mailPicker setToRecipients: toRecipients];         //添加抄送       NSArray *ccRecipients = [NSArray arrayWithObjects:@"[e-mail]", @"[e-mail]", nil];         [mailPicker setCcRecipients:ccRecipients];             //添加密送       NSArray *bccRecipients = [NSArray arrayWithObjects:@"[e-mail]", nil];         [mailPicker setBccRecipients:bccRecipients];                // 添加一张图片         UIImage *addPic = [UIImage imageNamed: @"[e-mail]"];         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];   }   

 第二种方法的劣势也很明显，iOS系统替我们提供了一个mail中的UI，而我们却完全无法对齐进行订制，这会让那些定制化成自己风格的App望而却步，因为这样使用的话无疑太突兀了。

 

3、我们可以根据自己的UI设计需求来定制相应的视图以适应整体的设计。可以使用比较有名的开源SMTP协议来实现。

 https://github.com/jetseven/skpsmtpmessage

在SKPSMTPMessage类中，并没有对视图进行任何的要求，它提供的都是数据层级的处理，你之需要定义好相应的发送要求就可以实现邮件发送了。至于是以什么样的方式获取这些信息，就可以根据软件的需求来确定交互方式和视图样式了。

SKPSMTPMessage *testMsg = [[SKPSMTPMessage alloc] init];testMsg.fromEmail = @"[e-mail]";testMsg.toEmail =@"[e-mail]";testMsg.relayHost = @"smtp.gmail.com";testMsg.requiresAuth = YES;testMsg.login = @"[e-mail]";testMsg.pass = @"test";testMsg.subject = [NSString stringWithCString:"测试" encoding:NSUTF8StringEncoding];testMsg.bccEmail = @"[e-mail]";testMsg.wantsSecure = YES; // smtp.gmail.com doesn't work without TLS! // Only do this for self-signed certs!// testMsg.validateSSLChain = NO;testMsg.delegate = self; NSDictionary *plainPart = [NSDictionary dictionaryWithObjectsAndKeys:@"text/plain",kSKPSMTPPartContentTypeKey,[NSString stringWithCString:"测试正文" encoding:NSUTF8StringEncoding],kSKPSMTPPartMessageKey,@"8bit",kSKPSMTPPartContentTransferEncodingKey,nil]; NSString *vcfPath = [[NSBundle mainBundle] pathForResource:@"test" ofType:@"vcf"];NSData *vcfData = [NSData dataWithContentsOfFile:vcfPath]; NSDictionary *vcfPart = [NSDictionary dictionaryWithObjectsAndKeys: @"text/directory;\r\n\tx-unix-mode=0644;\r\n\tname=\"test.vcf\"",kSKPSMTPPartContentTypeKey,@"attachment;\r\n\tfilename=\"test.vcf\"",kSKPSMTPPartContentDispositionKey,[vcfData encodeBase64ForData],kSKPSMTPPartMessageKey,@"base64",kSKPSMTPPartContentTransferEncodingKey,nil]; testMsg.parts = [NSArray arrayWithObjects:plainPart,vcfPart,nil]; [testMsg send];

 

该类也提供了相应的Delegate方法来让你更好的获知发送的状态.

-(void)messageSent:(SKPSMTPMessage *)message;-(void)messageFailed:(SKPSMTPMessage *)message error:(NSError *)error;