[Objective-C] iPhoneアプリからのメーラー起動

今回はiPhoneアプリからメーラーを起動する処理を紹介します。

メーラー起動のコントローラーはMessageUIライブラリのMFMailComposeViewControllerを使用します。

インポート

#import <MessageUI/MessageUI.h>
#import <MessageUI/MFMailComposeViewController.h>

デリゲート

@interface SampleViewController : UIViewController<MFMailComposeViewControllerDelegate>

ソースコード

// メールアプリ起動
- (void)mailStartUp
{
    Class mailClass = (NSClassFromString(@"MFMailComposeViewController"));
    if (mailClass != nil)
    {
        MFMailComposeViewController *mailPicker = [[MFMailComposeViewController alloc] init];
        mailPicker.mailComposeDelegate = self;
        [mailPicker setSubject:NSLocalizedString(@"件名", @"")];

        [mailPicker setMessageBody:@"本文" isHTML:NO];

        [mailPicker setToRecipients:@"受信メールアドレス"];

        if ([mailClass canSendMail])
        {
            [self presentViewController:mailPicker animated:TRUE completion:nil];
        }
    }
}

// メール送信処理完了時のイベント
- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error {
    switch (result)
    {
    	// キャンセル
        case MFMailComposeResultCancelled:
            break;
        // 保存
        case MFMailComposeResultSaved:
            break;
        // 送信
        case MFMailComposeResultSent:
        {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"送信に成功しました。" delegate:nil cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
            [alert show];
            break;
        }
        // 送信失敗
        case MFMailComposeResultFailed:
        {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"送信に失敗しました。" delegate:nil cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
            [alert show];
            break;
        }
        default:
            break;
    }
    [self dismissViewControllerAnimated:YES completion:nil];
}

メール本文には、開発者用にユーザーの端末情報やアプリのバージョンを入れとくと便利かもです。

以下、実装例

[mailPicker setMessageBody:@"本文" isHTML:NO];

の箇所を

[mailPicker setMessageBody:[NSString stringWithFormat:@"\n\n\n\n\nSystem Info : %@\nOS : %@\nApp Version : %@",
 [self systemVersion],
 [self iOSVersion],
 [self appVersion]] isHTML:NO];

に変更

端末情報の取得

- (NSString *)platformString
{
    struct utsname systemInfo;
    uname(&systemInfo);
    NSString *platform = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];

    if ([platform isEqualToString:@"iPhone1,1"]) return @"iPhone 1G";
    if ([platform isEqualToString:@"iPhone1,2"]) return @"iPhone 3G";
    if ([platform isEqualToString:@"iPhone2,1"]) return @"iPhone 3GS";
    if ([platform isEqualToString:@"iPhone3,1"]) return @"iPhone 4";
    if ([platform isEqualToString:@"iPhone3,2"]) return @"iPhone 4 CDMA";
    if ([platform isEqualToString:@"iPhone4,1"]) return @"iPhone 4S";
    if ([platform isEqualToString:@"iPhone5,1"]) return @"iPhone 5";    // GSM
    if ([platform isEqualToString:@"iPhone5,2"]) return @"iPhone 5";    // GSM+CDMA
    if ([platform isEqualToString:@"iPhone5,3"]) return @"iPhone 5C";   // GSM
    if ([platform isEqualToString:@"iPhone5,4"]) return @"iPhone 5C";   // GSM+CDMA
    if ([platform isEqualToString:@"iPhone6,1"]) return @"iPhone 5S";   // GSM
    if ([platform isEqualToString:@"iPhone6,2"]) return @"iPhone 5S";   // GSM+CDMA
    if ([platform isEqualToString:@"iPhone7,1"]) return @"iPhone 6";    // ?
    if ([platform isEqualToString:@"iPhone7,2"]) return @"iPhone 6";    // ?
    if ([platform isEqualToString:@"iPod1,1"])   return @"iPod Touch 1G";
    if ([platform isEqualToString:@"iPod2,1"])   return @"iPod Touch 2G";
    if ([platform isEqualToString:@"iPod3,1"])   return @"iPod Touch 3G";
    if ([platform isEqualToString:@"iPod4,1"])   return @"iPod Touch 4G";
    if ([platform isEqualToString:@"iPod5,1"])   return @"iPod Touch 5G";
    if ([platform isEqualToString:@"iPad1,1"])   return @"iPad";
    if ([platform isEqualToString:@"iPad2,1"])   return @"iPad 2 WiFi";
    if ([platform isEqualToString:@"iPad2,2"])   return @"iPad 2 GSM";
    if ([platform isEqualToString:@"iPad2,3"])   return @"iPad 2 CDMA";
    if ([platform isEqualToString:@"iPad2,4"])   return @"iPad 2 CDMAS";
    if ([platform isEqualToString:@"iPad2,5"])   return @"iPad Mini Wifi";
    if ([platform isEqualToString:@"iPad2,6"])   return @"iPad Mini (Wi-Fi + Cellular)";
    if ([platform isEqualToString:@"iPad2,7"])   return @"iPad Mini (Wi-Fi + Cellular MM)";
    if ([platform isEqualToString:@"iPad3,1"])   return @"iPad 3 WiFi";
    if ([platform isEqualToString:@"iPad3,2"])   return @"iPad 3 CDMA";
    if ([platform isEqualToString:@"iPad3,3"])   return @"iPad 3 GSM";
    if ([platform isEqualToString:@"iPad3,4"])   return @"iPad 4 Wifi";
    if ([platform isEqualToString:@"i386"])      return @"Simulator";
    if ([platform isEqualToString:@"x86_64"])    return @"Simulator";
    return @"Unknown";
}

iOSバージョンの取得

- (NSString *)iOSVersion
{
    return [[UIDevice currentDevice] systemVersion];
}

アプリバージョンの取得

- (NSString *)appVersion
{
    return [[NSBundle mainBundle] infoDictionary][@"CFBundleVersion"];
}

以上