Crash with UIActivityViewController

Question

Is it just me or in iOS 7, you can’t change the text color of any general application? For example, if you open Mail or iMessage applications, does the color return to the default by default or is there a way to change this? I could not.

Here are some screenshots. Pay attention to the blue color of the font when choosing the general UIActivityViewController application:

Here's what it looks like and what I want it to look when you open mail from MFMailComposerViewController:

Here's what it looks like when choosing a mail application from the UIActivityViewController:

The reason I want to change the font color is because it is difficult to read a text font, especially from the general iMessage application.

Answer 1

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[[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil] setTintColor:[UIColor whiteColor]];

Answer 2

[[UINavigationBar appearance] setBarTintColor:[UIColor whiteColor]];

setTintColor, .