发送短信时，应用程序崩溃了

Question

我想在iPhone 4中使用以下代码发送短信，但由于此代码，应用程序崩溃。

if ([MFMessageComposeViewController canSendText]) {
                MFMessageComposeViewController *smsComposerController = [[[MFMessageComposeViewController alloc] init] autorelease];
                [smsComposerController setBody:@"First SMS"];
                smsComposerController.recipients = [NSArray arrayWithObjects:@"9886333333",@"9980444444",nil];
                smsComposerController.messageComposeDelegate = self;
                [smsComposerController release];
            }

我是短信发送的新手，所以任何人都可以帮助我做错了吗？

Answer 1

您是autoreleasing，然后是releasing smsComposerController。

只需发布一次。您可以查看内存管理规则here。

Answer 2

if ([MFMessageComposeViewController canSendText]) {
            MFMessageComposeViewController *smsComposerController = [[[MFMessageComposeViewController alloc] init] autorelease];
            [smsComposerController setBody:@"First SMS"];
            smsComposerController.recipients = [NSArray arrayWithObjects:@"9886333333",@"9980444444",nil];
            smsComposerController.messageComposeDelegate = self;
            [smsComposerController release];          <-------------- THIS IS YOUR ERROR
        }

您不应该发布自动释放对象。

Answer 3

您需要添加[self presentModalViewController:smsComposerController animated:YES]; 在您的代码中发送短信。

if ([MFMessageComposeViewController canSendText]) {
            MFMessageComposeViewController *smsComposerController = [[[MFMessageComposeViewController alloc] init] autorelease];
            [smsComposerController setBody:@"First SMS"];
            smsComposerController.recipients = [NSArray arrayWithObjects:@"9886333333",@"9980444444",nil];
            smsComposerController.messageComposeDelegate = self;
           [self presentModalViewController:smsComposerController animated:YES];
        }