iOS應用內發送郵件

iPhone API已經提供了系統寫郵件界面的接口,使用MFMailComposeViewController，用來顯示界面.

項目中需要添加MessageUi.framework。頭文件加入MFMailComposeViewControllerDelegate。#import <MessageUI/MessageUI.h>

sendMailViewController.m文件的實現：


(void)viewDidLoad

{

  UIButton *button = [UIButton buttonWithType: UIButtonTypeRoundedRect];

  button.frame = CGRectMake(0, 40, 320, 50);

  [button setTitle: @"Mail" forState: UIControlStateNormal];

  [button addTarget: self action: @selector(sendEMail) forControlEvents: UIControlEventTouchUpInside];

  [self.view addSubview: button];

}

(void) alertWithTitle: (NSString )title msg: (NSString )msg

{

  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title

                                              message:msg   
                                             delegate:nil   
                                    cancelButtonTitle:@"確定"   
                                    otherButtonTitles:nil];  

[alert show];

  [alert release];

}


//點擊按鈕后，觸發這個方法

-(void)sendEMail

{

    Class mailClass = (NSClassFromString(@"MFMailComposeViewController"));

if (mailClass != nil)  
{  
    if ([mailClass canSendMail])  
    {  
        [self displayComposerSheet];  
    }   
    else   
    {  
        [self launchMailAppOnDevice];  
    }  
}   
else   
{  
    [self launchMailAppOnDevice];  
}      

}

//可以發送郵件的話

-(void)displayComposerSheet

{

    MFMailComposeViewController *mailPicker = [[MFMailComposeViewController alloc] init];

mailPicker.mailComposeDelegate = self;  

//設置主題  
[mailPicker setSubject: @"eMail主題"];  

// 添加發送者  
NSArray *toRecipients = [NSArray arrayWithObject: @"first@example.com"];  
//NSArray *ccRecipients = [NSArray arrayWithObjects:@"second@example.com", @"third@example.com", nil];  
//NSArray *bccRecipients = [NSArray arrayWithObject:@"fourth@example.com", nil];  
[mailPicker setToRecipients: toRecipients];  
//[picker setCcRecipients:ccRecipients];      
//[picker setBccRecipients:bccRecipients];  

// 添加圖片  
UIImage *addPic = [UIImage imageNamed: @"123.jpg"];  
NSData *imageData = UIImagePNGRepresentation(addPic);            // png  
// NSData *imageData = UIImageJPEGRepresentation(addPic, 1);    // jpeg  
[mailPicker addAttachmentData: imageData mimeType: @"" fileName: @"123.jpg"];  

NSString *emailBody = @"eMail 正文";  
[mailPicker setMessageBody:emailBody isHTML:YES];  

[self presentModalViewController: mailPicker animated:YES];  
[mailPicker release];  

}

-(void)launchMailAppOnDevice

{

    NSString recipients = @"mailto:first@example.com&subject=my email!";

    //@"mailto:first@example.com?cc=second@example.com,third@example.com&subject=my email!";

    NSString body = @"&body=email body!";

NSString *email = [NSString stringWithFormat:@"%@%@", recipients, body];  
email = [email stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];  

[[UIApplication sharedApplication] openURL: [NSURL URLWithString:email]];  

}

(void)mailComposeController:(MFMailComposeViewController *)controller

    didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error   

{

  NSString *msg;
switch (result)

  {

  case MFMailComposeResultCancelled:  
      msg = @"郵件發送取消";  
      break;  
  case MFMailComposeResultSaved:  
      msg = @"郵件保存成功";  
      [self alertWithTitle:nil msg:msg];  
      break;  
  case MFMailComposeResultSent:  
      msg = @"郵件發送成功";  
      [self alertWithTitle:nil msg:msg];  
      break;  
  case MFMailComposeResultFailed:  
      msg = @"郵件發送失敗";  
      [self alertWithTitle:nil msg:msg];  
      break;  
  default:  
      break;  

}
[self dismissModalViewControllerAnimated:YES];

}  </pre>