我试图让用户从他们的相机胶卷中挑选媒体，然后使用 iOS 6 社交框架将其分享到 Facebook。
下面是我的 didFinishPickingMediaWithInfo：
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
image1 = [info objectForKey:UIImagePickerControllerOriginalImage];
NSData *chosenImage =UIImageJPEGRepresentation(image1, 1.0);
imageView.image = [UIImage imageWithData:chosenImage];
[self dismissViewControllerAnimated:YES completion:nil];
}
当用户点击按钮时，这就是我所说的：
-(IBAction)shareImageToFacebook:(id)sender
{
//This is to display the UIImagePicker to let the user pick an image
controller = [[UIImagePickerController alloc]init];
controller.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;
controller.allowsEditing=YES;
[controller setDelegate:self];
[self presentViewController:controller animated:YES completion:nil];
//This is to display the SLComposeView to let the user share the photo
if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook])
{
SLComposeViewController *fbSheet = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];
[fbSheet setInitialText:@"Facebooking from my own app! :)"];
[fbSheet addImage:imageView.image]; //This is where I try to add my image
[self presentViewController:fbSheet animated:YES completion:nil];
}
else if (![SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook])
{
[self dismissViewControllerAnimated:NO completion:nil];
UIAlertView *alertView = [[UIAlertView alloc]
initWithTitle:@"Sorry"
message:@"You can't post to Facebook right now, make sure your device has an internet connection and you have at least one Facebook account setup"
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alertView show];
}
}
我最初尝试做的是首先让用户从相机胶卷中挑选照片，然后显示 Facebook 分享按钮以允许用户分享他们刚刚从相机胶卷中挑选的照片。
目前，我的解决方法（在上面的代码中）是将用户选择的图像设置到不可见的 UIImageView 上，然后将 UIImageView 的图像添加到 SLComposeViewController。“解决方法”不起作用，不仅如此，控制台还说我试图呈现 2 个视图（UIImagePickerController 和 SLComposeViewController）。来自控制台的直接警告消息是：
Warning: Attempt to present <SLFacebookComposeViewController: 0x94f2580> on <UINavigationController: 0xa4b5240> while a presentation is in progress!
我想知道如何让用户在他们的相机胶卷中选择一张图片，然后通过社交框架分享这张图片。