这里将UIKit的外观属性及方法从头文件中抽取出来，以便查找及熟悉。（更新到iOS 8.0，从A-Z排序）

UIActivityIndicatorView

@property (readwrite, nonatomic, retain) UIColor *color NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;

UIBarButtonItem

// 背景图片相关
- (UIImage *)backgroundImageForState:(UIControlState)state barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0)
UI_APPEARANCE_SELECTOR;
- (void)setBackgroundImage:(UIImage *)backgroundImage forState:(UIControlState)state style:(UIBarButtonItemStyle)style
barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
- (UIImage *)backgroundImageForState:(UIControlState)state style:(UIBarButtonItemStyle)style barMetrics:(UIBarMetrics)barMetrics
 NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
- (void)setBackgroundVerticalPositionAdjustment:(CGFloat)adjustment forBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0)
 UI_APPEARANCE_SELECTOR;
- (CGFloat)backgroundVerticalPositionAdjustmentForBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0)
UI_APPEARANCE_SELECTOR;
- (void)setTitlePositionAdjustment:(UIOffset)adjustment forBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0)
UI_APPEARANCE_SELECTOR;
- (UIOffset)titlePositionAdjustmentForBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
// 返回键 ：图片、文字
- (void)setBackButtonBackgroundImage:(UIImage *)backgroundImage forState:(UIControlState)state
barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (UIImage *)backButtonBackgroundImageForState:(UIControlState)state barMetrics:(UIBarMetrics)barMetrics
NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (void)setBackButtonTitlePositionAdjustment:(UIOffset)adjustment forBarMetrics:(UIBarMetrics)barMetrics
NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (UIOffset)backButtonTitlePositionAdjustmentForBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0)
UI_APPEARANCE_SELECTOR;
- (void)setBackButtonBackgroundVerticalPositionAdjustment:(CGFloat)adjustment forBarMetrics:(UIBarMetrics)barMetrics
NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (CGFloat)backButtonBackgroundVerticalPositionAdjustmentForBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0)
 UI_APPEARANCE_SELECTOR;

UIBarItem

// 标题富文本
- (void)setTitleTextAttributes:(NSDictionary *)attributes forState:(UIControlState)state NS_AVAILABLE_IOS(5_0)
UI_APPEARANCE_SELECTOR;
- (NSDictionary *)titleTextAttributesForState:(UIControlState)state NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;

UIButton

// 内边缘间距
@property(nonatomic) UIEdgeInsets contentEdgeInsets UI_APPEARANCE_SELECTOR; // default is UIEdgeInsetsZero
// 标题颜色、阴影颜色、背景图片
- (void)setTitleColor:(UIColor *)color forState:(UIControlState)state UI_APPEARANCE_SELECTOR;
// default if nil. use opaque white
- (void)setTitleShadowColor:(UIColor *)color forState:(UIControlState)state UI_APPEARANCE_SELECTOR;
// default is nil. use 50% black
- (void)setBackgroundImage:(UIImage *)image forState:(UIControlState)state UI_APPEARANCE_SELECTOR; // default is nil

UINavigationBar

@property(nonatomic,retain) UIColor *barTintColor NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR; // default is nil
// 背景图片相关 - 默认是张白色图片
- (void)setBackgroundImage:(UIImage *)backgroundImage forBarPosition:(UIBarPosition)barPosition
barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR;
- (UIImage *)backgroundImageForBarPosition:(UIBarPosition)barPosition barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(7_0)
UI_APPEARANCE_SELECTOR;
- (void)setBackgroundImage:(UIImage *)backgroundImage forBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0)
UI_APPEARANCE_SELECTOR;
- (UIImage *)backgroundImageForBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
// 阴影图片 - 即分割线
@property(nonatomic,retain) UIImage *shadowImage NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic,copy) NSDictionary *titleTextAttributes NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
//
- (void)setTitleVerticalPositionAdjustment:(CGFloat)adjustment forBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0)
UI_APPEARANCE_SELECTOR;
- (CGFloat)titleVerticalPositionAdjustmentForBarMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
//
@property(nonatomic,retain) UIImage *backIndicatorImage NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic,retain) UIImage *backIndicatorTransitionMaskImage NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR;

UIPageControl

// 分页小圆点颜色
@property(nonatomic,retain) UIColor *pageIndicatorTintColor NS_AVAILABLE_IOS(6_0)
UI_APPEARANCE_SELECTOR;
@property(nonatomic,retain) UIColor *currentPageIndicatorTintColor NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;

UIProgressView

@property(nonatomic, retain) UIColor* progressTintColor NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic, retain) UIColor* trackTintColor NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic, retain) UIImage* progressImage NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic, retain) UIImage* trackImage NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;

UIRefreshControl

@property (nonatomic, retain) NSAttributedString *attributedTitle UI_APPEARANCE_SELECTOR;

UISearchBar

@property(nonatomic,retain) UIColor *barTintColor NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR; // default is nil
@property(nonatomic,retain) UIImage *backgroundImage NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic,retain) UIImage *scopeBarBackgroundImage NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
//
- (void)setBackgroundImage:(UIImage *)backgroundImage forBarPosition:(UIBarPosition)barPosition
barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR;
// Use UIBarMetricsDefaultPrompt to set a separate backgroundImage for a search bar with a prompt
- (UIImage *)backgroundImageForBarPosition:(UIBarPosition)barPosition
barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR;
- (void)setSearchFieldBackgroundImage:(UIImage *)backgroundImage forState:(UIControlState)state
NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (UIImage *)searchFieldBackgroundImageForState:(UIControlState)state NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (void)setImage:(UIImage *)iconImage forSearchBarIcon:(UISearchBarIcon)icon state:(UIControlState)state
NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (UIImage *)imageForSearchBarIcon:(UISearchBarIcon)icon state:(UIControlState)state NS_AVAILABLE_IOS(5_0)
UI_APPEARANCE_SELECTOR;
- (void)setScopeBarButtonBackgroundImage:(UIImage *)backgroundImage forState:(UIControlState)state NS_AVAILABLE_IOS(5_0)
UI_APPEARANCE_SELECTOR;
- (UIImage *)scopeBarButtonBackgroundImageForState:(UIControlState)state NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (void)setScopeBarButtonDividerImage:(UIImage *)dividerImage forLeftSegmentState:(UIControlState)leftState
rightSegmentState:(UIControlState)rightState NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (UIImage *)scopeBarButtonDividerImageForLeftSegmentState:(UIControlState)leftState
rightSegmentState:(UIControlState)rightState NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (void)setScopeBarButtonTitleTextAttributes:(NSDictionary *)attributes forState:(UIControlState)state NS_AVAILABLE_IOS(5_0)
UI_APPEARANCE_SELECTOR;
- (NSDictionary *)scopeBarButtonTitleTextAttributesForState:(UIControlState)state NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;

UISearchBar

@property(nonatomic) UIOffset searchFieldBackgroundPositionAdjustment NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic) UIOffset searchTextPositionAdjustment NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (void)setPositionAdjustment:(UIOffset)adjustment forSearchBarIcon:(UISearchBarIcon)icon NS_AVAILABLE_IOS(5_0)
UI_APPEARANCE_SELECTOR;- (UIOffset)positionAdjustmentForSearchBarIcon:(UISearchBarIcon)icon NS_AVAILABLE_IOS(5_0)
UI_APPEARANCE_SELECTOR;

UISegmentedControl

// 背景图片
- (void)setBackgroundImage:(UIImage *)backgroundImage forState:(UIControlState)state barMetrics:(UIBarMetrics)barMetrics
 NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (UIImage *)backgroundImageForState:(UIControlState)state barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0)
UI_APPEARANCE_SELECTOR;
//分割线图片
- (void)setDividerImage:(UIImage *)dividerImage forLeftSegmentState:(UIControlState)leftState
rightSegmentState:(UIControlState)rightState barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (UIImage *)dividerImageForLeftSegmentState:(UIControlState)leftState rightSegmentState:(UIControlState)rightState
barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
// 文字富文本
- (void)setTitleTextAttributes:(NSDictionary *)attributes forState:(UIControlState)state NS_AVAILABLE_IOS(5_0)
UI_APPEARANCE_SELECTOR;
- (NSDictionary *)titleTextAttributesForState:(UIControlState)state NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
// 位置相关
- (void)setContentPositionAdjustment:(UIOffset)adjustment forSegmentType:(UISegmentedControlSegment)leftCenterRightOrAlone
barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
 - (UIOffset)contentPositionAdjustmentForSegmentType:(UISegmentedControlSegment)leftCenterRightOrAlone
barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;

UISlider

// 已滑过的线颜色
@property(nonatomic,retain) UIColor *minimumTrackTintColor NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
// 未滑过线颜色
@property(nonatomic,retain) UIColor *maximumTrackTintColor NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
// 滑动圆片颜色
@property(nonatomic,retain) UIColor *thumbTintColor NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;

UIStepper

// 背景图片
- (void)setBackgroundImage:(UIImage*)image forState:(UIControlState)state NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
- (UIImage*)backgroundImageForState:(UIControlState)state NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
// 分割图片
- (void)setDividerImage:(UIImage*)image forLeftSegmentState:(UIControlState)leftState
rightSegmentState:(UIControlState)rightState NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
- (UIImage*)dividerImageForLeftSegmentState:(UIControlState)state rightSegmentState:(UIControlState)state
NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
// 增加部分
- (void)setIncrementImage:(UIImage *)image forState:(UIControlState)state NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
- (UIImage *)incrementImageForState:(UIControlState)state NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
// 减少部分
- (void)setDecrementImage:(UIImage *)image forState:(UIControlState)state NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
- (UIImage *)decrementImageForState:(UIControlState)state NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;

UISwitch

@property(nonatomic, retain) UIColor *onTintColor NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic, retain) UIColor *thumbTintColor NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic, retain) UIImage *onImage NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic, retain) UIImage *offImage NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;

UITabBar

@property(nonatomic,retain) UIColor *barTintColor NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR; // default is nil
@property(nonatomic,retain) UIColor *selectedImageTintColor NS_DEPRECATED_IOS(5_0,8_0,"Use tintColor") UI_APPEARANCE_SELECTOR;
@property(nonatomic,retain) UIImage *backgroundImage NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic,retain) UIImage *selectionIndicatorImage NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic,retain) UIImage *shadowImage NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic) UITabBarItemPositioning itemPositioning NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic) CGFloat itemWidth NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic) CGFloat itemSpacing NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR;
@property(nonatomic) UIBarStyle barStyle NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR;

UITabBarItem

- (void)setTitlePositionAdjustment:(UIOffset)adjustment NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (UIOffset)titlePositionAdjustment NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;

UITableView

@property (nonatomic) UIEdgeInsets separatorInset NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR;
// allows customization of the frame of cell separators
@property (nonatomic, retain) UIColor *sectionIndexColor NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
// color used for text of the section index
// 索引条背景图片
@property (nonatomic, retain) UIColor *sectionIndexBackgroundColor NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR;
// the background color of the section index while not being touched
@property (nonatomic, retain) UIColor *sectionIndexTrackingBackgroundColor NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;
// the background color of the section index while it is being touched
// 分割线 - 实际上是高度1颜色浅灰的UIView
@property (nonatomic, retain) UIColor *separatorColor UI_APPEARANCE_SELECTOR; // default is the standard separator gray
//
@property (nonatomic, copy) UIVisualEffect *separatorEffect NS_AVAILABLE_IOS(8_0) UI_APPEARANCE_SELECTOR;
// effect to apply to table separators

UITableViewCell

@property (nonatomic) UIEdgeInsets separatorInset NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR;
// allows customization of the separator frame

UIToolBar

@property(nonatomic,retain) UIColor *barTintColor NS_AVAILABLE_IOS(7_0) UI_APPEARANCE_SELECTOR;
// default is nil
- (void)setBackgroundImage:(UIImage *)backgroundImage forToolbarPosition:(UIBarPosition)topOrBottom
barMetrics:(UIBarMetrics)barMetrics NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (UIImage *)backgroundImageForToolbarPosition:(UIBarPosition)topOrBottom barMetrics:(UIBarMetrics)barMetrics
NS_AVAILABLE_IOS(5_0) UI_APPEARANCE_SELECTOR;
- (void)setShadowImage:(UIImage *)shadowImage forToolbarPosition:(UIBarPosition)topOrBottom NS_AVAILABLE_IOS(6_0)
 UI_APPEARANCE_SELECTOR;
- (UIImage *)shadowImageForToolbarPosition:(UIBarPosition)topOrBottom NS_AVAILABLE_IOS(6_0) UI_APPEARANCE_SELECTOR;

UIView

@property(nonatomic,copy) UIColor *backgroundColor UI_APPEARANCE_SELECTOR; // default is nil. Can be useful with the

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