iphone - 尝试发送电子邮件，获取 "use of undeclared unidentified MFMailComposeViewController"

我正在尝试在我的应用程序中发送电子邮件。我正在尝试使用MFMailComposeViewController对象，但收到一条错误消息，提示其为“未声明的标识符”

代码:

-(IBAction) aContact: (id) sender;
{


    if([MFMailComposeViewController canSendMail]){

        MFMailComposeViewController *mailCtrl = [[[MFMailComposeViewController alloc] init] autorelease];
        [mailCtrl setSubject:@"Your TellaFortune Card Reading"];
        //  [mailCtrl setToRecipients:[NSArray arrayWithObject:@"[email protected]"]];
        mailCtrl.mailComposeDelegate = self;

        NSString *send;
        send=[ NSString stringWithFormat: @"%@ %@",content,@"\n \n By www.TellaFortune.com"];
        [mailCtrl setMessageBody: send  isHTML: false];

        [self presentModalViewController:mailCtrl animated:NO];
        //      [mailCtrl release];

    }
    else
    {
        UIAlertView *alert=[[ UIAlertView alloc]
                            initWithTitle:@"Cannot send email"
                            message: @"Please check internet connection and email set up"
                            delegate: self
                            cancelButtonTitle:@"Ok"
                            otherButtonTitles: nil];

        [alert show];
    }

}

最佳答案

将框架“MessageUI.framework”导入到项目中，然后在.h文件中添加

#import <MessageUI/MessageUI.h>