Programming iOS 6, 3rd Edition

UIVideoEditorController

UIVideoEditorController is a view controller that presents an interface where the user can trim video. Its view and internal behavior are outside your control, and you’re not supposed to subclass it. You are expected to show the view controller’s view as a presented view on the iPhone or in a popover on the iPad, and respond by way of its delegate.

Before summoning a UIVideoEditorController, be sure to call its class method canEditVideoAtPath:. Not every video format is editable, and not every device supports video editing. If this call returns NO, don’t instantiate UIVideoEditorController to edit the given file. (This call can take some noticeable time to return.) You must also set the UIVideoEditorController instance’s delegate and videoPath before presenting it; the delegate should adopt both UINavigationControllerDelegate and UIVideoEditorControllerDelegate:

NSURL* m = [[NSBundle mainBundle] URLForResource:@"ElMirage" withExtension:@"mp4"]; BOOL can = [UIVideoEditorController canEditVideoAtPath:path]; if (!can) { NSLog(@"can't edit this video"); return; } UIVideoEditorController* vc = [UIVideoEditorController new]; vc.delegate = self; vc.videoPath = path; if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad) { UIPopoverController* pop = [[UIPopoverController alloc] initWithContentViewController:vc]; pop.delegate = self; self.currentPop = pop; [pop presentPopoverFromRect:[sender bounds] inView:sender permittedArrowDirections:UIPopoverArrowDirectionAny ...