模拟器上的MFMessageComposeViewController - canSendText？

问题描述

以下情况：我想发送应用短信。这是我创建MFMessageComposeViewController的代码：

following situation: I want to send in app SMS. This is my code creating the MFMessageComposeViewController:

-(void) showMessageComposerWithText:(NSString*)messageText telNumber:(NSString*)telNumber composeDelegate:(id)delegate
{
    MFMessageComposeViewController *controller = [[MFMessageComposeViewController alloc] init];
    if([MFMessageComposeViewController canSendText])
    {   
        controller.body = messageText;
        controller.recipients = [NSArray arrayWithObject:telNumber];
        controller.messageComposeDelegate = delegate;

        [delegate presentModalViewController:controller animated:YES];
    }
}

所以我认为这是直截了当的。在Simulator中测试时，我得到以下异常：应用程序试图在目标< MFMessageComposeViewController：0x8a4e090> 上推送nil视图控制器。我也想知道为什么 [MFMessageComposeViewController canSendText] 在模拟器中运行应用程序时返回 YES 。

So I think this is straight forward. When testing in Simulator I get following exception: Application tried to push a nil view controller on target <MFMessageComposeViewController: 0x8a4e090>. I'm also wondering myself why [MFMessageComposeViewController canSendText] returns YES when running the app in the simulator.

在设备上运行时，一切正常。

When running on the device, everything is working correctly.

我在docs / web中找不到任何内容这个奇怪的行为。

I couldn't find anything in the docs/web concerning this strange behavior.

我在OS 10.7.3上运行Xcode 4.3，部署目标是iOS 5.0。

I'm running Xcode 4.3 on OS 10.7.3, Deployment Target is iOS 5.0.

提前致谢，
tubtub

Thanks in advance,tubtub

推荐答案

在OS X Lion上安装Messages beta时会出现此问题。

This problem occurs when you install Messages beta on OS X Lion.

编辑：当配置并启用iMessage帐户时，它也会出现在Mountain Lion上。如果该帐户被禁用，它可以正常工作（canSendText返回NO）。

It also occurs on Mountain Lion when there is an iMessage account configured and enabled. If the account is disabled, it works correctly (canSendText returns NO).

提示：如果您使用 controller.modalTransitionStyle = UIModalTransitionStylePartialCurl ，你可以点击左上角的卷曲页面返回模拟器。

Tip: If you use controller.modalTransitionStyle = UIModalTransitionStylePartialCurl, you can go back in Simulator by clicking on the curled "page" in the upper left corner.

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