IOS发送Email的两种方法-备

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: @"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]];

}

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: @"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];

}