如何通过iOS应用程序通过电子邮件和消息共享字符串？

Question

我的Web视图打开了一个特定的URL，并设置了该URL，如果用户点击搜索按钮，则会显示以下对话框：

当用户点击各个按钮时，如何允许用户共享网址字符串？ 这是我到目前为止的内容：

- (IBAction)shareButtonAction:(id)sender {
    UIActionSheet *popup = [[UIActionSheet alloc] initWithTitle:@"Select Sharing option:" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:
                            @"Share via E-mail",
                            @"Share via iMessage",
                            nil];
    popup.tag = 1;
    [popup showInView:[UIApplication sharedApplication].keyWindow];
}

- (void)actionSheet:(UIActionSheet *)popup clickedButtonAtIndex:(NSInteger)buttonIndex {

    switch (popup.tag) {
        case 1: {
            switch (buttonIndex) {
                case 0:
                    NSLog(@"lets share on email");
                    break;
                case 1:
                    NSLog(@"lets share on iMessage");
                    break;
                default:
                    break;
            }
            break;
        }
        default:
            break;
    }
}

Answer 1

通过电子邮件和消息共享使用的是相同的框架，这些步骤是：

1. 将MessageUI框架添加到您的项目中。
2. 将标题导入您的类中： #import <MessageUI/MessageUI.h>
3. 实现共享代码

使用MFMailComposeViewController通过电子邮件共享：

if ([MFMailComposeViewController canSendMail]) {
    MFMailComposeViewController *mailController = [[MFMailComposeViewController alloc] init];
    [mailController setMailComposeDelegate:self];
    [mailController setSubject:@"Your subject"];
    [mailController setToRecipients:@[@"email1", @"email2"];
    [mailController setMessageBody:@"Your body" isHTML:NO];
    [self presentViewController:mailController animated:YES completion:nil];
}

// Then implement the delegate method
- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error {
    [self dismissViewControllerAnimated:YES completion:nil];
}

和MFMessageComposeViewController通过消息共享：

if ([MFMessageComposeViewController canSendText]) {
    MFMessageComposeViewController *messageController = [[MFMessageComposeViewController alloc] init];
    [messageController setMessageComposeDelegate:self];
    [messageController setRecipients:[NSArray arrayWithObject:@"recipient"]];
    [messageController setBody:@"Your body"];
    [self presentViewController:messageController animated:NO completion:nil];
}

// Then implement the delegate method
- (void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result {
    [self dismissViewControllerAnimated:YES completion:nil];
}