IOS發送Email的兩種方法

IOS系統框架提供的兩種發送Email的方法：openURL 和 MFMailComposeViewController。借助這兩個方法，我們可以輕松的在應用里加入如用戶反饋這類需要發送郵件的功能。

 

1.openURL

使用openURL調用系統郵箱客戶端是我們在IOS3.0以下實現發郵件功能的主要手段。我們可以通過設置url里的相關參數來指定郵件的內容，不過其缺點很明顯，這樣的過程會導致程序暫時退出。下面是使用openURL來發郵件的一個小例子：

#pragma mark - 使用系統郵件客戶端發送郵件
-(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:@","]];
    //添加主題
    [mailUrl appendString:@"&subject=my email"];
    //添加郵件內容
    [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新增的一個接口，它在MessageUI.framework中。通過調用MFMailComposeViewController，可以把郵件發送窗口集成到我們的應用里，發送郵件就不需要退出程序了。MFMailComposeViewController的使用方法：

• 1.項目中引入MessageUI.framework；
• 2.在使用的文件中導入MFMailComposeViewController.h頭文件；
• 3.實現MFMailComposeViewControllerDelegate，處理郵件發送事件；
• 4.調出郵件發送窗口前先使用MFMailComposeViewController里的“+ (BOOL)canSendMail”方法檢查用戶是否設置了郵件賬戶；
• 5.初始化MFMailComposeViewController，構造郵件體

 

//
//  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 - 在應用內發送郵件
//激活郵件功能
- (void)sendMailInApp
{
    Class mailClass = (NSClassFromString(@"MFMailComposeViewController"));
    if (!mailClass) {
        [self alertWithMessage:@"當前系統版本不支持應用內發送郵件功能，您可以使用mailto方法代替"];
        return;
    }
    if (![mailClass canSendMail]) {
        [self alertWithMessage:@"用戶沒有設置郵件賬戶"];
        return;
    }
    [self displayMailPicker];
}

//調出郵件發送窗口
- (void)displayMailPicker
{
    MFMailComposeViewController *mailPicker = [[MFMailComposeViewController alloc] init];
    mailPicker.mailComposeDelegate = self;

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

    // 添加一張圖片
    UIImage *addPic = [UIImage imageNamed: @"[e-mail]"];
    NSData *imageData = UIImagePNGRepresentation(addPic);            // png
    //關於mimeType：http://www.iana.org/assignments/media-types/index.html
    [mailPicker addAttachmentData: imageData mimeType: @"" fileName: @"Icon.png"];

    //添加一個pdf附件
    NSString *file = [self fullBundlePathFromRelativePath:@"高質量C++編程指南.pdf"];
    NSData *pdf = [NSData dataWithContentsOfFile:file];
    [mailPicker addAttachmentData: pdf mimeType: @"" fileName: @"高質量C++編程指南.pdf"];

    NSString *emailBody = @"<font color='red'>eMail</font> 正文";
    [mailPicker setMessageBody:emailBody isHTML:YES];
    [self presentModalViewController: mailPicker animated:YES];
    [mailPicker release];
}

#pragma mark - 實現 MFMailComposeViewControllerDelegate
- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
{
    //關閉郵件發送窗口
    [self dismissModalViewControllerAnimated:YES];
    NSString *msg;
    switch (result) {
        case MFMailComposeResultCancelled:
            msg = @"用戶取消編輯郵件";
            break;
        case MFMailComposeResultSaved:
            msg = @"用戶成功保存郵件";
            break;
        case MFMailComposeResultSent:
            msg = @"用戶點擊發送，將郵件放到隊列中，還沒發送";
            break;
        case MFMailComposeResultFailed:
            msg = @"用戶試圖保存或者發送郵件失敗";
            break;
        default:
            msg = @"";
            break;
    }
    [self alertWithMessage:msg];
}