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;