| 简介 
                          我们可以使用电子邮件应用程序 iOS 设备发送电子邮件(Email)。 
                          涉及的步骤 1. 创建一个简单的 View based application. 2. 选择项目文件,然后选择目标,添加 MessageUI.framework. 3. 在 ViewController.xib 添加一个按键并创建一个用于发送电子邮件的动作。   4. 更新 ViewController.h 如下 
                          
                            | #import <UIKit/UIKit.h>#import <MessageUI/MessageUI.h>
 @interface ViewController : UIViewController<MFMailComposeViewControllerDelegate>{
 MFMailComposeViewController *mailComposer;
 }
 -(IBAction)sendMail:(id)sender; @end |  
                          4. 更新 ViewController.m 如下 
                          
                            | #import "ViewController.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad{
 [super viewDidLoad];
 }
 - (void)didReceiveMemoryWarning{
 [super didReceiveMemoryWarning];
 // Dispose of any resources that can be recreated.
 }
 -(void)sendMail:(id)sender{mailComposer = [[MFMailComposeViewController alloc]init];
 mailComposer.mailComposeDelegate = self;
 [mailComposer setSubject:@"Test mail"];
 [mailComposer setMessageBody:@"Testing message
 for the test mail" isHTML:NO];
 [self presentModalViewController:mailComposer animated:YES];
 }
 #pragma mark - mail compose delegate-(void)mailComposeController:(MFMailComposeViewController *)controller
 didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error{
 if (result) {
 NSLog(@"Result : %d",result);
 }
 if (error) {
 NSLog(@"Error : %@",error);
 }
 [self dismissModalViewControllerAnimated:YES];
 } @end |  
                          输出 
                          现在,当我们运行程序时,我们会得到下面的输出。 
 在点击“发送电子邮件,我们将得到下面的输出。 
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