本文主要是介绍IOS自带Email的两种方法,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
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: @"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];
- }
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