iOS开发常见问题-Appearance

Appearance的使用场合

• 只要后面带有UI_APPEARANCE_SELECTOR的方法或者属性,都可以通过appearance对象统一设置
• 比如

@interface UISwitch : UIControl <NSCoding>

@property(nullable, nonatomic, strong) UIColor *onTintColor NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;

@end

UISwitch *s = [UISwitch appearance];
s.onTintColor = [UIColor redColor];