iphone - 发送短信时，应用程序崩溃

Question

我想在 iPhone 4 中使用以下代码发送短信，但应用程序仅由于此代码而崩溃。

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 SMS 发送的新手，所以任何人都可以帮助我做错了什么吗？

Answer 1

你是autoreleasing，然后releasing又是smsComposerController。

只需释放一次。您可以在此处查看内存管理规则。

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
        }

您不应该释放自动释放对象。

Answer 3

您需要添加 [self presentModalViewController:smsComposerController animated:YES]; 代码以发送短信。

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];
        }