在Sprite Kit中以编程方式发送电子邮件

Question

我尝试使用MessageUI框架以编程方式发送邮件。这是我的MyScene.m中的代码。当我调用该方法时，会打开一个邮件窗口。但当我取消邮件或发送邮件时，它不会返回到MyScene。

    #import <MessageUI/MessageUI.h>
    -(void)sendMail
{
    MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init];
    mc.mailComposeDelegate = self;
    [mc setSubject:@"Subject"];
    [mc setMessageBody:@"Hello!" isHTML:NO];
    [mc setToRecipients:[NSArray arrayWithObject:@"[e-mail]"]];

    // Present mail view controller on screen
    [self.view.window.rootViewController presentViewController:mc animated:YES completion:NULL];

}

- (void) mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
{
    switch (result)
    {
        case MFMailComposeResultCancelled:
            NSLog(@"Mail cancelled");
            break;
        case MFMailComposeResultSaved:
            NSLog(@"Mail saved");
            break;
        case MFMailComposeResultSent:
            NSLog(@"Mail sent");
            break;
        case MFMailComposeResultFailed:
            NSLog(@"Mail sent failure: %@", [error localizedDescription]);
            break;
        default:
            break;
    }

    // Close the Mail Interface
    [self.view.window.rootViewController dismissViewControllerAnimated:YES completion:NULL];
}

- Maxime Defauw

Answer 1

您正在设置MFMailComposeViewController的委托对象：

MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init];
mc.mailComposeDelegate = self;

将其更改为：

更改为

mc.mailComposeDelegate = self.view.window.rootViewController;

当然，这是一种不好的做法。SKScene 是一个演示层，应该从UIViewController中展示 MFMailComposeViewController。 编辑： 将此代码添加到GameSceneViewController 中：

- (void)viewDidLoad {
    [super viewDidLoad];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sendMail) name:@"showMailComposer" object:nil];
}

-(void)sendMail
{
    MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init];
    mc.mailComposeDelegate = self;
    [mc setSubject:@"Subject"];
    [mc setMessageBody:@"Hello!" isHTML:NO];
    [mc setToRecipients:[NSArray arrayWithObject:@"[e-mail]"]];

    // Present mail view controller on screen
    [self.view.window.rootViewController presentViewController:mc animated:YES completion:NULL];

}

- (void) mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error
{
    switch (result)
    {
        case MFMailComposeResultCancelled:
            NSLog(@"Mail cancelled");
            break;
        case MFMailComposeResultSaved:
            NSLog(@"Mail saved");
            break;
        case MFMailComposeResultSent:
            NSLog(@"Mail sent");
            break;
        case MFMailComposeResultFailed:
            NSLog(@"Mail sent failure: %@", [error localizedDescription]);
            break;
        default:
            break;
    }

    // Close the Mail Interface
    [self dismissViewControllerAnimated:YES completion:NULL];
}

当您想发送邮件时，请调用此函数：

[[NSNotificationCenter defaultCenter] postNotificationName:@"showMailComposer" object:nil];

- Andrey Gordeev

---

那也不起作用。我该如何从UIViewController中呈现它？ - Maxime Defauw

“- (void) mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error” 是否被触发？ - Andrey Gordeev