IOS自带Email的两种方法实例详解
IOS自带Email的两种方法实例详解
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：
#pragmamark-使用系统邮件客户端发送邮件
-(void)launchMailApp
{
NSMutableString*mailUrl=[[[NSMutableStringalloc]init]autorelease];
//添加收件人
NSArray*toRecipients=[NSArrayarrayWithObject:@"first@example.com"];
[mailUrlappendFormat:@"mailto:%@",[toRecipientscomponentsJoinedByString:@","]];
//添加抄送
NSArray*ccRecipients=[NSArrayarrayWithObjects:@"second@example.com",@"third@example.com",nil];
[mailUrlappendFormat:@"?cc=%@",[ccRecipientscomponentsJoinedByString:@","]];
//添加密送
NSArray*bccRecipients=[NSArrayarrayWithObjects:@"fourth@example.com",nil];
[mailUrlappendFormat:@"&bcc=%@",[bccRecipientscomponentsJoinedByString:@","]];
//添加主题
[mailUrlappendString:@"&subject=myemail"];
//添加邮件内容
[mailUrlappendString:@"&body=emailbody!"];
NSString*email=[mailUrlstringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
[[UIApplicationsharedApplication]openURL:[NSURLURLWithString: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 // //CreatedbyLUOYLon12-4-4. //Copyright(c)2012年http://luoyl.info.Allrightsreserved. // #import#import @interfaceViewController:UIViewController @end
#pragmamark-在应用内发送邮件
//激活邮件功能
-(void)sendMailInApp
{
ClassmailClass=(NSClassFromString(@"MFMailComposeViewController"));
if(!mailClass){
[selfalertWithMessage:@"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(![mailClasscanSendMail]){
[selfalertWithMessage:@"用户没有设置邮件账户"];
return;
}
[selfdisplayMailPicker];
}
//调出邮件发送窗口
-(void)displayMailPicker
{
MFMailComposeViewController*mailPicker=[[MFMailComposeViewControlleralloc]init];
mailPicker.mailComposeDelegate=self;
//设置主题
[mailPickersetSubject:@"eMail主题"];
//添加收件人
NSArray*toRecipients=[NSArrayarrayWithObject:@"first@example.com"];
[mailPickersetToRecipients:toRecipients];
//添加抄送
NSArray*ccRecipients=[NSArrayarrayWithObjects:@"second@example.com",@"third@example.com",nil];
[mailPickersetCcRecipients:ccRecipients];
//添加密送
NSArray*bccRecipients=[NSArrayarrayWithObjects:@"fourth@example.com",nil];
[mailPickersetBccRecipients:bccRecipients];
//添加一张图片
UIImage*addPic=[UIImageimageNamed:@"Icon@2x.png"];
NSData*imageData=UIImagePNGRepresentation(addPic);//png
//关于mimeType：http://www.iana.org/assignments/media-types/index.html
[mailPickeraddAttachmentData:imageDatamimeType:@""fileName:@"Icon.png"];
//添加一个pdf附件
NSString*file=[selffullBundlePathFromRelativePath:@"高质量C++编程指南.pdf"];
NSData*pdf=[NSDatadataWithContentsOfFile:file];
[mailPickeraddAttachmentData:pdfmimeType:@""fileName:@"高质量C++编程指南.pdf"];
NSString*emailBody=@"eMail正文";
[mailPickersetMessageBody:emailBodyisHTML:YES];
[selfpresentModalViewController:mailPickeranimated:YES];
[mailPickerrelease];
}
#pragmamark-实现MFMailComposeViewControllerDelegate
-(void)mailComposeController:(MFMailComposeViewController*)controllerdidFinishWithResult:(MFMailComposeResult)resulterror:(NSError*)error
{
//关闭邮件发送窗口
[selfdismissModalViewControllerAnimated:YES];
NSString*msg;
switch(result){
caseMFMailComposeResultCancelled:
msg=@"用户取消编辑邮件";
break;
caseMFMailComposeResultSaved:
msg=@"用户成功保存邮件";
break;
caseMFMailComposeResultSent:
msg=@"用户点击发送，将邮件放到队列中，还没发送";
break;
caseMFMailComposeResultFailed:
msg=@"用户试图保存或者发送邮件失败";
break;
default:
msg=@"";
break;
}
[selfalertWithMessage:msg];
}