显示系统警报“没有邮件帐户"； [英] Show System Alert "No Mail Accounts"

问题描述

当前，我正在使用 [MFMailComposeViewController canSendMail] 检查设备中是否存在某些帐户.如果不是，我希望显示一些警报.

Currently I am using [MFMailComposeViewController canSendMail] to check if there exists some Account in Device. If Not I wish to show some Alert.

我看到了一个同类型的应用程序，该应用程序以本地化语言发出没有邮件帐户"警报.

I saw an app of same kind which gives the alert "No Mail Accounts" in Localized Language.

我想要相同的警报，也应将其本地化.

I want the same Alert which should also be localized.

是某些系统警报还是我必须使用所有本地化字符串创建一个自定义?

Is it some system Alert Or Will I have to create a custom with all localization strings?

这是我正在使用的确切实现方式

Here is the exact implementation I am using

if (![MFMailComposeViewController canSendMail])
   return nil;
MFMailComposeViewController *mailViewController = [[MFMailComposeViewController alloc] init];
if(mailViewController)
{
      //Setting Email Stuff
}

推荐答案

这是系统消息，因此您不必本地化它，如果您的项目包含该语言，它将以正确的语言显示

It's a system message, so you don't have to localize it, it will be displayed in the correct language if your project contains that language

            Class mailClass = (NSClassFromString(@"MFMailComposeViewController"));
            if (mailClass != nil)
            {
                MFMailComposeViewController *vc = [[[MFMailComposeViewController alloc] init] autorelease];
                if (vc!=nil) {
                    [vc setSubject:@"Mail subject"];

                    NSMutableString * message = @"mail message";

                    [vc setMessageBody:message isHTML:YES];


                    vc.mailComposeDelegate = self;

                    [self presentModalViewController:vc animated:YES];
                }

            }
            else
            {
                //Device doesn't include mail class, so it can't send mails
            }

请勿选中 canSendMail ，当您尝试发送邮件时，设备将显示无帐户"警报

Don't check the canSendMail and the device will show the no accounts alert when you try to send the message

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