Iphone 4 MFmailcomposeviewcontroller 崩溃

Question

     Iphone 4 MFMailComposeViewController 



     MFMailComposeViewController* controller = [[MFMailComposeViewController alloc] init];
    controller.mailComposeDelegate = self;
    [controller setMessageBody:@"Welcome" isHTML:NO];
    [controller release];

  My app to be crash.
  Wat i  did wrong

问候， 阿伦

Answer 1

如果用户无法发送邮件，邮件编辑器将会崩溃。在尝试实例化 MFMailComposeViewController 之前，首先检查用户是否能够发送邮件。

if([MFMailComposeViewController canSendMail])
{
   MFMailComposeViewController* controller = [[[MFMailComposeViewController alloc] init] autorelease];
   //...

}