//
//  UIButton.h
//  UIKit
//
//  Copyright (c) 2005-2013, Apple Inc. All rights reserved.
//

@class UIImage, UIFont, UIColor, UIImageView, UILabel;

typedef NS_ENUM(NSInteger, UIButtonType) {
    UIButtonTypeCustom = 0,                         // 無樣式夷恍，用戶調(diào)整
    UIButtonTypeSystem NS_ENUM_AVAILABLE_IOS(7_0),  // 系統(tǒng)標(biāo)準(zhǔn)樣式

    UIButtonTypeDetailDisclosure, // 圈圈 i 樣式
    UIButtonTypeInfoLight,        // 圈圈 i 樣式
    UIButtonTypeInfoDark,         // 圈圈 i 樣式
    UIButtonTypeContactAdd,       // 圈圈 + 樣式
    
    UIButtonTypeRoundedRect = UIButtonTypeSystem,   // 淘汰，用 UIButtonTypeSystem 替代
};

NS_CLASS_AVAILABLE_IOS(2_0) @interface UIButton : UIControl <NSCoding> {
  @private // 私有的
    CFMutableDictionaryRef _contentLookup;
    UIEdgeInsets           _contentEdgeInsets;  // 內(nèi)容的內(nèi)邊距
    UIEdgeInsets           _titleEdgeInsets;    // 標(biāo)題的內(nèi)邊距
    UIEdgeInsets           _imageEdgeInsets;    // 圖片的內(nèi)邊距
    
    UIImageView           *_backgroundView;      // 內(nèi)部的背景圖片控件
    UIImageView           *_imageView;           // 內(nèi)部的圖片控件
    UILabel               *_titleView;           // 內(nèi)部的標(biāo)題
    
    BOOL                   _initialized;
    UIControlState         _lastDrawingControlState;
    struct {
        unsigned int reversesTitleShadowWhenHighlighted:1;
        unsigned int adjustsImageWhenHighlighted:1;
        unsigned int adjustsImageWhenDisabled:1;
        unsigned int autosizeToFit:1;
        unsigned int disabledDimsImage:1;
        unsigned int showsTouchWhenHighlighted:1;
        unsigned int buttonType:8;
        unsigned int shouldHandleScrollerMouseEvent:1;
        unsigned int titleFrozen:1;
    } _buttonFlags;
}

+ (id)buttonWithType:(UIButtonType)buttonType;

@property(nonatomic)          UIEdgeInsets contentEdgeInsets UI_APPEARANCE_SELECTOR; // 內(nèi)容縮進(jìn)
@property(nonatomic)          UIEdgeInsets titleEdgeInsets;                // 文字標(biāo)題縮進(jìn)
@property(nonatomic)          BOOL         reversesTitleShadowWhenHighlighted; // 默認(rèn) NO. 高亮?xí)r，陰影反轉(zhuǎn)
@property(nonatomic)          UIEdgeInsets imageEdgeInsets;                // 圖片縮進(jìn)

@property(nonatomic)          BOOL         adjustsImageWhenHighlighted;    // default is YES. if YES, image is drawn darker when highlighted(pressed)
@property(nonatomic)          BOOL         adjustsImageWhenDisabled;       // default is YES. if YES, image is drawn lighter when disabled
@property(nonatomic)          BOOL         showsTouchWhenHighlighted;      // 點(diǎn)擊時(shí)按鈕中間現(xiàn)實(shí)白色的高亮
@property(nonatomic,retain)   UIColor     *tintColor NS_AVAILABLE_IOS(5_0); // The tintColor is inherited through the superview hierarchy. See UIView for more information.
@property(nonatomic,readonly) UIButtonType buttonType;

# 設(shè)置內(nèi)部子控件的屬性
- (void)setTitle:(NSString *)title forState:(UIControlState)state; # 字體
- (void)setTitleColor:(UIColor *)color forState:(UIControlState)state UI_APPEARANCE_SELECTOR; #字體顏色
- (void)setTitleShadowColor:(UIColor *)color forState:(UIControlState)state UI_APPEARANCE_SELECTOR; # 陰影
- (void)setImage:(UIImage *)image forState:(UIControlState)state;
- (void)setBackgroundImage:(UIImage *)image forState:(UIControlState)state UI_APPEARANCE_SELECTOR;
- (void)setAttributedTitle:(NSAttributedString *)title forState:(UIControlState)state NS_AVAILABLE_IOS(6_0);

# 這些 getters 方法只返回一種狀態(tài)的值
- (NSString *)titleForState:(UIControlState)state;
- (UIColor *)titleColorForState:(UIControlState)state;
- (UIColor *)titleShadowColorForState:(UIControlState)state;
- (UIImage *)imageForState:(UIControlState)state;
- (UIImage *)backgroundImageForState:(UIControlState)state;
- (NSAttributedString *)attributedTitleForState:(UIControlState)state NS_AVAILABLE_IOS(6_0);

# 當(dāng)按鈕的狀態(tài)改變時(shí)向叉，這些值會(huì)自動(dòng)改變邑闲，只有g(shù)et方法斩箫，只讀的
@property(nonatomic,readonly,retain) NSString *currentTitle;             // 可以為空
@property(nonatomic,readonly,retain) UIColor  *currentTitleColor;        // 默認(rèn)是white(1,1) 退腥，不能為空
@property(nonatomic,readonly,retain) UIColor  *currentTitleShadowColor;  // default is white(0,0.5).
@property(nonatomic,readonly,retain) UIImage  *currentImage;             // 可以為空
@property(nonatomic,readonly,retain) UIImage  *currentBackgroundImage;   // 可以為空
@property(nonatomic,readonly,retain) NSAttributedString *currentAttributedTitle NS_AVAILABLE_IOS(6_0); # 可以為空

# return title and image views. will always create them if necessary. always returns nil for system buttons
@property(nonatomic,readonly,retain) UILabel     *titleLabel NS_AVAILABLE_IOS(3_0);
@property(nonatomic,readonly,retain) UIImageView *imageView  NS_AVAILABLE_IOS(3_0);


#pragma - mark 自定義按鈕惕稻，重寫這些方法調(diào)整按鈕內(nèi)部子控件的尺寸
- (CGRect)backgroundRectForBounds:(CGRect)bounds;
- (CGRect)contentRectForBounds:(CGRect)bounds;
- (CGRect)titleRectForContentRect:(CGRect)contentRect;
- (CGRect)imageRectForContentRect:(CGRect)contentRect;

@end

# 已經(jīng)失效
@interface UIButton(UIButtonDeprecated)

@property(nonatomic,retain) UIFont         *font              NS_DEPRECATED_IOS(2_0, 3_0); // 字體
@property(nonatomic)        NSLineBreakMode lineBreakMode     NS_DEPRECATED_IOS(2_0, 3_0); //
@property(nonatomic)        CGSize          titleShadowOffset NS_DEPRECATED_IOS(2_0, 3_0);

@end