ios - 从 iOS SDK 发送电子邮件

Question

我正在尝试从我的 iOS 应用程序中发送电子邮件。

想法是拥有一个类 SendMessage，所有类都使用它从应用程序内发送电子邮件。它是 NSObject 的子类，是一个 MFMailComposeViewControllerDelegate

这是 SendMessage 类的样子

@implementation SendMessage

- (void) sendEmailFromViewController : (UIViewController *)viewController withSubject : (NSString *) subject withRecipient : (NSString *)recipient withMessage : (NSString *)message withCompletionBlock : (void(^)(void))completionBlock withFailure : (void(^)(void))failure {

    self.viewController = viewController;

    if (![MFMailComposeViewController canSendMail]){
        if (failure)
            failure();
    }
    else {
        MFMailComposeViewController *messageController = [[MFMailComposeViewController alloc] init];
        messageController.mailComposeDelegate = self.viewController;
        [messageController setSubject:subject];
        [messageController setToRecipients:[NSArray arrayWithObject:recipient]];
        [messageController setMessageBody:message isHTML:NO];

        [self.viewController presentModalViewController:messageController animated:YES];

    }
}

-(void) mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error {
    [self.viewController dismissViewControllerAnimated:YES completion:nil];
}

@end

我正在尝试使用以下方式调用类:

-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    if (indexPath.row == 3) {
        SendMessage *sendFeedback = [[SendMessage alloc] init];
        [sendFeedback sendEmailFromViewController:self withSubject:@"App Feedback" withRecipient:@"ashisha@moj.io" withMessage:@"This is app feedback" withCompletionBlock:nil withFailure:nil];
    }
}

问题是虽然我能够发送电子邮件，但未调用委托(delegate)方法。我该如何解决？

Answer 1

您的委托(delegate)是 UIViewController，因此在那里实现 mailComposeController:didFinishWithResult:error 委托(delegate)方法。