在 Sprite Kit 中以编程方式发送邮件

Question

我尝试使用 MessageUI 框架以编程方式发送邮件。这就是我在 MyScene.m 中所拥有的。当我调用该方法时，会打开一个邮件窗口。但是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:@"my.email@gmail.com"]];

    // 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];
}

Answer 1

您正在将场景设置为MFMailComposeViewController 的代理：

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

改成

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

但这当然是一种不好的做法。 SKScene 是表示层。您应该从UIViewController 提交MFMailComposeViewController。

编辑：

将此代码添加到GameSceneViewController:

- (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:@"my.email@gmail.com"]];

    // 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];
}

当你想发送邮件时调用这个：

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