问题:

In my app, I want to share an image, text and url. I do that as follows:

UIActivityViewController *controller =  [[UIActivityViewController alloc]                                              initWithActivityItems:@[text, url, image]                                              applicationActivities:nil];      controller.excludedActivityTypes = @[UIActivityTypePostToWeibo,                                          //UIActivityTypeMessage,                                          //UIActivityTypeMail,                                          UIActivityTypePrint,                                          UIActivityTypeCopyToPasteboard,                                          UIActivityTypeAssignToContact,                                          UIActivityTypeSaveToCameraRoll,                                          UIActivityTypeAddToReadingList,                                          UIActivityTypePostToFlickr,                                          UIActivityTypePostToVimeo,                                          UIActivityTypePostToTencentWeibo,                                          UIActivityTypeAirDrop];      [self presentViewController:controller animated:YES completion:nil];

Unfortunately, as a result, the modal dialog covers the whole screen of my iphone, although it only displays four share icons.

I think that is out of proportion, and would like to adjust the height of the controller, so it only accommodates that one needed row.

[Update] I am running this code on a real device (iPhone 5s running the very latest beta of iOS 8), and the size of the image doesn't seem to matter. However, in my console I see the following messages, that should help to fix the issue.

2014-09-17 15:24:27.068 AppName[1826:747596] Unable to simultaneously satisfy constraints.     Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)  (     "<NSLayoutConstraint:0x17008a5a0 UIView:0x1781945d0.bottom == _UIAlertControllerView:0x13c51ea00.bottom>",     "<NSLayoutConstraint:0x17008aeb0 V:|-(0)-[UIView:0x178194d20]   (Names: '|':_UIAlertControllerView:0x13c51ea00 )>",     "<NSLayoutConstraint:0x17008af50 UIView:0x178194d20.bottom <= _UIAlertControllerView:0x13c51ea00.bottom>",     "<NSLayoutConstraint:0x17008afa0 UIView:0x1781945d0.centerY == UIView:0x178194d20.centerY>",     "<NSLayoutConstraint:0x17008a550 V:|-(>=8)-[UIView:0x1781945d0]   (Names: '|':_UIAlertControllerView:0x13c51ea00 )>" )

Thanks for your feedback so far.

回答1:

I just upgraded my Xcode from beta to release 6.01 and the problem disappeared. Thanks for your patience..

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