全局设置背景颜色在UIButtons上

Question

全局更改所有UIButtons背景颜色的最佳方法是什么？我已经全局设置了色调

[[UIApplication sharedApplication] delegate].window.tintColor =

Answer 1

[[UIButton appearance] setBackgroundImage:[UIImage imageNamed:@"button.png"]
                            forState:UIControlStateNormal];

或者

[[UIButton appearance] setBackgroundColor:[UIColor purpleColor]];

以下是有关外观代理的更多信息：http://developer.apple.com/library/ios/documentation/uikit/reference/UIAppearance_Protocol/Reference/Reference.html

Answer 2

检查出来：

[[UIButton appearance] setBackgroundColor:[UIColor redColor]];