ios - Facebook整合iOS 7问题

Question

刚在Macbook上切换到XCode 5和iOS 7，以为一切都可以正常工作，因为我没有做任何特别的事情，但是没有用。

我在6.1应用程序上进行了Facebook集成，这就是我正在做的事情:

- (IBAction)facebookTapped:(UIButton *)sender {

    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        //Check if the net is reachable
        SLComposeViewController * faceSheet=[self.socialIntegration showFacebook:@"text" andImage:nil andLink:@"link" andView:self];
        dispatch_sync(dispatch_get_main_queue(), ^{
            //[self netConnectionTrue:cell Connected:answer];
            //[tempAlertView show];
            [self presentViewController:faceSheet animated:YES completion:NO];

        });
    });


}

现在，当我按下按钮时，这就是我得到的:

+ [SocailIntegration modalTransitionStyle]:无法识别的选择器已发送给类0x49b30

应用程序在此行中断:[self presentViewController:faceSheet animated:YES completion:NO];
有谁知道为什么会这样？

编辑:这是我在socialIntegration类中的代码:

-(SLComposeViewController *) showFacebook:(NSString *) initialText andImage:(NSString *) imageName andLink:(NSString *) link andView:(UIViewController *) controller {

    if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook])
    {
        SLComposeViewController *faceSheet = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];
        [faceSheet setInitialText:initialText];
        if (imageName.length!=0)
        {
            [faceSheet addImage:[UIImage imageNamed:imageName]];
        }
        if (link.length!=0)
        {
            [faceSheet addURL:[NSURL URLWithString:link]];
        }
        return faceSheet;
        //[controller presentViewController:faceSheet animated:YES completion:nil];


    }
    else
    {
        UIAlertView *alertView = [[UIAlertView alloc]
                                  initWithTitle:@"Sorry"
                                  message:@"You can't send a status right now, make sure your device has an internet connection and you have at least one Facebook account setup"
                                  delegate:nil
                                  cancelButtonTitle:@"OK"
                                  otherButtonTitles:nil];
        [alertView show];
    }

}

Answer 1

您的自定义socialIntegration类中有一个错误。如果设备上有Facebook，则仅返回SLComposeViewController。如果不是，则不返回任何内容。

但是，您在实际调用它时不会对此进行测试:

SLComposeViewController * faceSheet=[self.socialIntegration showFacebook:@"text" andImage:nil andLink:@"link" andView:self];
        dispatch_sync(dispatch_get_main_queue(), ^{
            //[self netConnectionTrue:cell Connected:answer];
            //[tempAlertView show];
            [self presentViewController:faceSheet animated:YES completion:NO];

        });

...您没有检查faceSheet是否为nil。因此，如果没有Facebook帐户，则可以使用nil对象调用presentViewController，这会触发您所看到的错误。

您在iOS 7上看到此问题的原因可能是您的关联FB帐户可能已重置，但这也可能是导致iOS 6用户崩溃的原因。