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ios - UIActivityViewController - how to change the cancel button text

Does anybody know how to change the standard cancel button text value of UIActivityViewController? By default it's "Cancel". But I want to change it e.g. to be in different language.

How to do it? Thanks!

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Update: The code below only worked on iOS7.

Like Rikkles said, you don't need to customise the text to make it localized. But just in case someone ever has a good reason to do this, here's the code:

NSArray *activityItems = @[@"Test"];

UIActivityViewController *activityController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];

NSAttributedString *as = [[NSAttributedString alloc] initWithString:@"Custom Text" attributes:@{NSForegroundColorAttributeName:[UIColor greenColor]}];
[[UIButton appearanceWhenContainedIn:[UIActivityViewController class], nil] setAttributedTitle:as forState:UIControlStateNormal];

[self presentViewController:activityController animated:YES completion:nil];

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