FWAlertAction

@interface FWAlertAction : NSObject <NSCopying>

+ (instancetype)actionWithTitle:(nullable NSString *)title style:(FWAlertActionStyle)style handler:(void (^ __nullable)(FWAlertAction *action))handler;
+ (instancetype)actionWithTitle:(nullable NSString *)title style:(FWAlertActionStyle)style appearance:(nullable FWAlertControllerAppearance *)appearance handler:(void (^ __nullable)(FWAlertAction *action))handler;

/** action的标题 */
@property(nullable, nonatomic, copy) NSString *title;
/** action的富文本标题 */
@property(nullable, nonatomic, copy) NSAttributedString *attributedTitle;
/** action的图标，位于title的左边 */
@property(nullable, nonatomic, copy) UIImage *image;
/** title跟image之间的间距 */
@property (nonatomic, assign) CGFloat imageTitleSpacing;
/** 渲染颜色,当外部的图片使用了UIImageRenderingModeAlwaysTemplate时,使用该属性可改变图片的颜色 */
@property (nonatomic, strong) UIColor *tintColor;
/** 是否能点击,默认为YES */
@property(nonatomic, getter=isEnabled) BOOL enabled;
/** action的标题颜色,这个颜色只是普通文本的颜色，富文本颜色需要用NSForegroundColorAttributeName */
@property(nonatomic, strong) UIColor *titleColor;
/** action的标题字体,如果文字太长显示不全，会自动改变字体自适应按钮宽度，最多压缩文字为原来的0.5倍封顶 */
@property(nonatomic, strong) UIFont *titleFont;
/** action的标题的内边距，如果在不改变字体的情况下想增大action的高度，可以设置该属性的top和bottom值,默认UIEdgeInsetsMake(0, 15, 0, 15) */
@property(nonatomic, assign) UIEdgeInsets titleEdgeInsets;

/** 样式 */
@property(nonatomic, readonly) FWAlertActionStyle style;
/** 自定义样式，默认为样式单例 */
@property (nonatomic, strong, readonly) FWAlertControllerAppearance *alertAppearance;

@end