ios - How can I implement a button in my app so every time a user presses it, the whole app default colour changes -

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as title says, implement button when user presses once, general default colour changes. user presses button once , app theme becomes green , when pressed again, theme changes red , pressed again goes initial theme colour. have quick example? on google, when search above, how change colour of button. in advance!

yes hook action , whenever uibutton pressed call:

cgfloat red =  (cgfloat)arc4random() / (cgfloat)rand_max; cgfloat blue = (cgfloat)arc4random() / (cgfloat)rand_max; cgfloat green = (cgfloat)arc4random() / (cgfloat)rand_max; uicolor *color = [uicolor colorwithred:red green:green blue:blue alpha:1.0]; self.view.backgroundcolor = color;

these lines of code generate random rgb numbers , turnes views color color.

to change other view controllers view:

yourviewcontroller.view.backroundcolor = color;

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