如何在UIActionSheet中點擊索引按鈕時撰寫郵件？

Question

當我單擊UIActionSheet中的電子郵件選項時，如何顯示郵件編輯器，我有點困惑。 這裏是我的示例代碼：

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex { 
    if(buttonIndex == 0) 
    { 
     NSString *emailTitle = @"Test Email"; 
     NSString *messageBody = @"iOS programming is so fun!"; 
     NSArray *toRecipents = [NSArray arrayWithObject:@"support@email.com"]; 
     MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init]; 
     mc.mailComposeDelegate = self; 
     [mc setSubject:emailTitle]; 
     [mc setMessageBody:messageBody isHTML:NO]; 
     [mc setToRecipients:toRecipents]; 
     [self presentViewController:mc animated:YES completion:NULL]; 
    } 
} 

Answer 1

確保您添加到您的.h文件，並導入MessageUI.framework

這裏是你尋找什麼。我經常使用它。通過UIActionSheets在iOS版8.這裏不推薦的方式你走，但：

.H

ViewController : UIViewController <MFMailComposeViewControllerDelegate> 

.M

- (IBAction)showActionSheet:(id)sender { 

UIActionSheet *moreActions = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Add To Favorites", @"Search",@"Email", nil]; 
[moreActions showInView:self.view]; 
} 

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

switch (buttonIndex) { 
    case 0: [self addToFav:self]; 
     break; 
    case 1: ; [self popSearchBar:self]; 
     break; 
    case 2: { [self sendEmail]; 
     break; 
    } 
     break; 
} 
} 
- (void)sendEmail { 
NSString *emailTitle = @"This is email title"; 
// Email Content as for HTML 
NSString *messageBody = [NSString stringWithFormat:@"I may have found a missing document in your catalog. I tried opening :<p><strong><font color=\"red\"> %@ </font><br>'%@'</strong></p> with no results. Can I have a dollar for reporting this?", self.title, self.titleString]; 
// To address 
NSArray *toRecipents = [NSArray arrayWithObject:@"youremail@google.com"]; 

MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init]; 
mc.mailComposeDelegate = self; 
[mc setSubject:emailTitle]; 
[mc setMessageBody:messageBody isHTML:YES]; 
[mc setToRecipients:toRecipents]; 

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

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

還要注意，有些人的遊戲模擬器電子郵件的問題。在放棄之前在設備上試用它。

Answer 2

這是子選項的代碼。而不是索引使用按鈕的名稱來激發你的郵件選項。

Answer 3

下面的代碼：

首先添加和導入信息框架：

#import <MessageUI/MessageUI.h> 

然後標記你的自我作爲這樣

@interface MYViewController() <MFMailComposeViewControllerDelegate> 

然後委託拉起作曲：

- (IBAction)emailButtonPressed:(id)sender 
{ 
    if ([MFMailComposeViewController canSendMail]) { 
     MFMailComposeViewController *composeViewController = [[MFMailComposeViewController alloc] initWithNibName:nil bundle:nil]; 
     [composeViewController setMailComposeDelegate:self]; 
     [composeViewController setToRecipients:@[@"example@email.com"]]; 
     [composeViewController setSubject:@"example subject"]; 
     [self presentViewController:composeViewController animated:YES completion:nil]; 
    } 
} 

然後辦理委託回調和罷免作曲家：使用actionSheet: clickedButtonAtIndex:

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

    //Get the name of the current pressed button 
    NSString *buttonTitle = [actionSheet buttonTitleAtIndex:buttonIndex]; 

    if ([buttonTitle isEqualToString:@"Your button title"]) { 
     [self btnContact]; 
    } 

} 

調用此方法

- (void)btnContact{ 
    // Email Subject 
    NSString *emailTitle = @""; 
    // Email Content 
    NSString *messageBody = @""; 
    // To address 
    NSString *toRecp = @""; 
    NSArray *toRecipents = [NSArray arrayWithObject:toRecp]; 

    MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init]; 
    mc.mailComposeDelegate = self; 
    [mc setSubject:emailTitle]; 
    [mc setMessageBody:messageBody isHTML:NO]; 
    [mc setToRecipients:toRecipents]; 

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