UIDocumentInteractionController通过Instagram分享(而且只有Instagram)

Question

当我使用UIDocumentInteractionController允许用户通过Instagram分享时，它确实有效，它会将"open“和"Instagram”选项作为选项之一.问题是，它还显示了许多其他应用，如"Facebook“和”Twitter“.

有没有办法让它只允许在instagram应用程序中打开？

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Instagram声称有一种方法可以做到这一点：http://instagram.com/developer/iphone-hooks/，但他们提到：

"Alternatively, if you want to show only Instagram in the application list (instead of Instagram plus any other public/jpeg-conforming apps) you can specify the extension class igo, which is of type com.instagram.exclusivegram."

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但我真的不知道这部分是什么意思，"extension class igo“

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我的代码：

UIImage *imageToUse = [UIImage imageNamed:@"imageToShare.png"];
NSString *documentDirectory=[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
NSString *saveImagePath=[documentDirectory stringByAppendingPathComponent:@"Image.ig"];
NSData *imageData=UIImagePNGRepresentation(imageToUse);
[imageData writeToFile:saveImagePath atomically:YES];
NSURL *imageURL=[NSURL fileURLWithPath:saveImagePath];
docController = [UIDocumentInteractionController interactionControllerWithURL:imageURL];
docController.delegate = self;
docController.annotation = [NSDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:@"This is the users caption that will be displayed in Instagram"], @"InstagramCaption", nil];
docController.UTI = @"com.instagram.exclusivegram";
[docController presentOpenInMenuFromRect:CGRectMake(1, 1, 1, 1) inView:self.view animated:YES];

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Answer 1

原来，要使doc控制器只在Instagram中打开，只需保存png或jpg文件格式的".igo“文件类型扩展名，(可能代表Instagram？)

将代码中的第三行代码改为：

NSString *saveImagePath=[documentDirectory stringByAppendingPathComponent:@"Image.igo"];

(加上"igo")

然后成功了！)

Answer 2

iOS 13的较低版本：

NSString *saveImagePath=[documentDirectory stringByAppendingPathComponent:@"Image.igo"];

在iOS 13之后：

NSString *saveImagePath=[documentDirectory stringByAppendingPathComponent:@"Image.ig"];