如何使用objective c在MessageUI中设置发件人？

@interface YourViewController : UIViewController <MFMailComposeViewControllerDelegate>

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

[mailComposeVC setToRecipients:@[@"sender@example.com"]];

[self presentViewController:mailComposeVC animated:YES completion:nil];

#import <MessageUI/MessageUI.h>

@interface YourViewController : UIViewController <MFMailComposeViewControllerDelegate>

// ...

@end

@implementation YourViewController

// ...

- (void)sendEmail {
    if ([MFMailComposeViewController canSendMail]) {
        MFMailComposeViewController *mailComposeVC = [[MFMailComposeViewController alloc] init];
        mailComposeVC.mailComposeDelegate = self;
        [mailComposeVC setToRecipients:@[@"sender@example.com"]];
        [self presentViewController:mailComposeVC animated:YES completion:nil];
    } else {
        // 当设备不支持发送邮件时的处理逻辑
    }
}

#pragma mark - MFMailComposeViewControllerDelegate

- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error {
    // 处理邮件发送结果和错误
    [controller dismissViewControllerAnimated:YES completion:nil];
}

@end