@class UIImage, UIFont, UIColor, UIImageView, UILabel;//设置UIButton的样式typedef NS_ENUM(NSInteger, UIButtonType) {    UIButtonTypeCustom = 0,                         // 自定义，无风格    UIButtonTypeSystem NS_ENUM_AVAILABLE_IOS(7_0),  // standard system button    UIButtonTypeDetailDisclosure, //蓝色的披露按钮，可放在任何文字旁    UIButtonTypeInfoLight,  //微件(widget)使用的小圆圈信息按钮，可以放在任何文字旁    UIButtonTypeInfoDark,  //白色背景下使用的深色圆圈信息按钮    UIButtonTypeContactAdd, //蓝色加号(+)按钮，可以放在任何文字旁        UIButtonTypeRoundedRect = UIButtonTypeSystem,   // 白色圆角矩形，类似偏好设置表格单元或者地址簿卡片};NS_CLASS_AVAILABLE_IOS(2_0) @interface UIButton : UIControl <NSCoding>+ (instancetype)buttonWithType:(UIButtonType)buttonType;@property(nonatomic)          UIEdgeInsets contentEdgeInsets UI_APPEARANCE_SELECTOR; // 默认值 UIEdgeInsetsZero 所有按钮的内容周围的矩形的内侧或者外侧的边缘@property(nonatomic)          UIEdgeInsets titleEdgeInsets;                // 默认值UIEdgeInsetsZero 设置文字的EdgeInsets 在按钮标题文本周围矩形的，向内或者向外的边缘@property(nonatomic)          BOOL         reversesTitleShadowWhenHighlighted; // 默认值NO.当按钮高亮时，是否更改标题阴影@property(nonatomic)          UIEdgeInsets imageEdgeInsets;                // 默认值 UIEdgeInsetsZero 设置UIButton上的图标间距 属于按钮图片周围矩形的，向内或者向外的边缘@property(nonatomic)          BOOL         adjustsImageWhenHighlighted;    // 默认值为YES.默认情况下，在按钮被禁用时，图像会被画的颜色深一些。要禁用此功能，请将这个属性设置为NO：@property(nonatomic)          BOOL         adjustsImageWhenDisabled;       // 默认值为YES.默认情况下，按钮在被禁用时，图像会被画的颜色淡一些。要禁用此功能，请将这个属性设置为NO：@property(nonatomic)          BOOL         showsTouchWhenHighlighted;      // 默认值为 NO. 这个属性设置为YES，可令按钮在按下时发光@property(null_resettable, nonatomic,strong)   UIColor     *tintColor NS_AVAILABLE_IOS(5_0); // The tintColor is inherited through the superview hierarchy. See UIView for more information.//获取当前UIButton的UIButtonType 只读@property(nonatomic,readonly) UIButtonType buttonType;//常见的设置属性效果- (void)setTitle:(nullable NSString *)title forState:(UIControlState)state;                   - (void)setTitleColor:(nullable UIColor *)color forState:(UIControlState)state UI_APPEARANCE_SELECTOR; - (void)setTitleShadowColor:(nullable UIColor *)color forState:(UIControlState)state UI_APPEARANCE_SELECTOR; - (void)setImage:(nullable UIImage *)image forState:(UIControlState)state;                      - (void)setBackgroundImage:(nullable UIImage *)image forState:(UIControlState)state UI_APPEARANCE_SELECTOR; - (void)setAttributedTitle:(nullable NSAttributedString *)title forState:(UIControlState)state NS_AVAILABLE_IOS(6_0); // default is nil. title is assumed to be single line- (nullable NSString *)titleForState:(UIControlState)state;      - (nullable UIColor *)titleColorForState:(UIControlState)state;- (nullable UIColor *)titleShadowColorForState:(UIControlState)state;- (nullable UIImage *)imageForState:(UIControlState)state;- (nullable UIImage *)backgroundImageForState:(UIControlState)state;- (nullable NSAttributedString *)attributedTitleForState:(UIControlState)state NS_AVAILABLE_IOS(6_0);//获取当前UIButton的一些属性值 都为只读@property(nullable, nonatomic,readonly,strong) NSString *currentTitle;             // normal/highlighted/selected/disabled. can return nil@property(nonatomic,readonly,strong) UIColor  *currentTitleColor;        // normal/highlighted/selected/disabled. always returns non-nil. default is white(1,1)@property(nullable, nonatomic,readonly,strong) UIColor  *currentTitleShadowColor;  // normal/highlighted/selected/disabled.@property(nullable, nonatomic,readonly,strong) UIImage  *currentImage;             // normal/highlighted/selected/disabled. can return nil@property(nullable, nonatomic,readonly,strong) UIImage  *currentBackgroundImage;   // normal/highlighted/selected/disabled. can return nil@property(nullable, nonatomic,readonly,strong) NSAttributedString *currentAttributedTitle NS_AVAILABLE_IOS(6_0);  // normal/highlighted/selected/disabled. can return nil@property(nullable, nonatomic,readonly,strong) UILabel     *titleLabel NS_AVAILABLE_IOS(3_0);@property(nullable, nonatomic,readonly,strong) UIImageView *imageView  NS_AVAILABLE_IOS(3_0);//指定背景边界- (CGRect)backgroundRectForBounds:(CGRect)bounds;//指定内容边界- (CGRect)contentRectForBounds:(CGRect)bounds;//指定文字标题边界- (CGRect)titleRectForContentRect:(CGRect)contentRect;//指定按钮图像边界- (CGRect)imageRectForContentRect:(CGRect)contentRect;@end

enum{UIControlStateNormal       = 0,//常态UIControlStateHighlighted  = 1 << 0,//高亮UIControlStateDisabled     = 1 << 1,//禁用UIControlStateSelected     = 1 << 2,//选中UIControlStateApplication  = 0x00FF0000,//当应用程序标志使用时UIControlStateReserved     = 0xFF000000//为内部框架预留的};typedef NSUInteger UIControlState;

typedef NS_ENUM(NSInteger, UIControlContentHorizontalAlignment) {    UIControlContentHorizontalAlignmentCenter = 0,    UIControlContentHorizontalAlignmentLeft   = 1,    UIControlContentHorizontalAlignmentRight  = 2,    UIControlContentHorizontalAlignmentFill   = 3,};

typedef NS_OPTIONS(NSUInteger, UIControlEvents){UIControlEventTouchDown                 = 1 <<  0,//单点触摸按下事件：用户点触屏幕，或者又有新手指落下的时候。UIControlEventTouchDownRepeat      = 1 <<  1,//多点触摸按下事件，点触计数大于1：用户按下第二、三、或第四根手指的时候。UIControlEventTouchDragInside         = 1 <<  2,//当一次触摸在控件窗口内拖动时。UIControlEventTouchDragOutside       = 1 <<  3,//当一次触摸在控件窗口之外拖动时。UIControlEventTouchDragEnter           = 1 <<  4,//当一次触摸从控件窗口之外拖动到内部时UIControlEventTouchDragExit             = 1 <<  5,//当一次触摸从控件窗口内部拖动到外部时。UIControlEventTouchUpInside            = 1 <<  6,//所有在控件之内触摸抬起事件UIControlEventTouchUpOutside          = 1 <<  7,//所有在控件之外触摸抬起事件(点触必须开始与控件内部才会发送通知)。UIControlEventTouchCancel                = 1 <<  8,//所有触摸取消事件，即一次触摸因为放上了太多手指而被取消，或者被上锁或者电话呼叫打断。UIControlEventValueChanged             = 1 << 12,//当控件的值发生改变时，发送通知。用于滑块、分段控件、以及其他取值的控件。你可以配置滑块控件何时发送通知，在滑块被放下时发送，或者在被拖动时发送。UIControlEventEditingDidBegin           = 1 << 16,//当文本控件中开始编辑时发送通知UIControlEventEditingChanged           = 1 << 17,//当文本控件中的文本被改变时发送通知。UIControlEventEditingDidEnd              = 1 << 18,//当文本控件中编辑结束时发送通知。UIControlEventEditingDidEndOnExit    = 1 << 19,//当文本控件内通过按下回车键（或等价行为）结束编辑时，发送通知。UIControlEventAllTouchEvents             = 0x00000FFF,//通知所有触摸事件。UIControlEventAllEditingEvents           = 0x000F0000,//通知所有关于文本编辑的事件。UIControlEventApplicationReserved    = 0x0F000000,//range available for application useUIControlEventSystemReserved          = 0xF0000000,//range reserved for internal framework useUIControlEventAllEvents                      = 0xFFFFFFFF//通知所有事件};

@class UIColor, UIFont;NS_CLASS_AVAILABLE_IOS(2_0) @interface UILabel : UIView <NSCoding>@property(nullable, nonatomic,copy)   NSString           *text;            // 设置文本内容@property(null_resettable, nonatomic,strong) UIFont      *font;            // 设置文本字体，默认是系统17@property(null_resettable, nonatomic,strong) UIColor     *textColor;       // 设置文本色@property(nullable, nonatomic,strong) UIColor            *shadowColor;     // 设置文本的阴影@property(nonatomic)        CGSize             shadowOffset;    // 默认值CGSizeMake(0, -1) @property(nonatomic)        NSTextAlignment    textAlignment;   // 默认值 NSTextAlignmentLeft 文字位置排版@property(nonatomic)        NSLineBreakMode    lineBreakMode;   // default is NSLineBreakByTruncatingTail. used for single and multiple lines of text// 富文本属性@property(nullable, nonatomic,copy)   NSAttributedString *attributedText NS_AVAILABLE_IOS(6_0);  // 默认值 nil@property(nullable, nonatomic,strong)               UIColor *highlightedTextColor; // 默认值 nil@property(nonatomic,getter=isHighlighted) BOOL     highlighted;          // 默认值 NO@property(nonatomic,getter=isUserInteractionEnabled) BOOL userInteractionEnabled;  // 默认值为 NO 所以它没有点击事件效果@property(nonatomic,getter=isEnabled)                BOOL enabled;                 // 默认值为YES.//行数 0表示不限制@property(nonatomic) NSInteger numberOfLines;@property(nonatomic) BOOL adjustsFontSizeToFitWidth;         // 默认值为 NO 文字的大小是否根据宽度来自动调整@property(nonatomic) UIBaselineAdjustment baselineAdjustment; // default is UIBaselineAdjustmentAlignBaselines@property(nonatomic) CGFloat minimumScaleFactor NS_AVAILABLE_IOS(6_0); // default is 0.0@property(nonatomic) BOOL allowsDefaultTighteningForTruncation NS_AVAILABLE_IOS(9_0); // default is NO//重写UILabel布局- (CGRect)textRectForBounds:(CGRect)bounds limitedToNumberOfLines:(NSInteger)numberOfLines;- (void)drawTextInRect:(CGRect)rect;//这个属性是用来设置多行label的最大宽度的//当自动布局的时候约束这个label的时候这个属性会起作用//在自动布局添加约束中，若文本超过了指定的最大宽度的时候 文本会另起一行 从而增加了label的高度@property(nonatomic) CGFloat preferredMaxLayoutWidth NS_AVAILABLE_IOS(6_0);// IOS7以后就弃用@property(nonatomic) CGFloat minimumFontSize NS_DEPRECATED_IOS(2_0, 6_0); // deprecated - use minimumScaleFactor. default is 0.0// IOS7以后就弃用@property(nonatomic) BOOL adjustsLetterSpacingToFitWidth NS_DEPRECATED_IOS(6_0,7_0);@end

NSLineBreakByWordWrapping = 0, 按着一个单词来显示 不会被剪辑剩余的不会被显示NSLineBreakByCharWrapping,   按着一个字体来显示 不会被剪辑剩余的不会被显示NSLineBreakByClipping,         把能显示的全显示完 剩下的直接不显示可能有的字显示一半就被剪辑NSLineBreakByTruncatingHead,   在那一行显示不全的话 那一行 就以 ...abcd模式来显示NSLineBreakByTruncatingTail,   在那一行显示不全的话 那一行 就以 abcd...模式来显示NSLineBreakByTruncatingMiddle 在那一行显示不全的话那一行 就以 ab...cd模式来显示

NSTextAlignmentLeft=0     左对齐NSTextAlignmentCenter=1    居中NSTextAlignmentRight=2     右对齐NSTextAlignmentJustified=3 左右两边都对齐 一个段落的最后一行是natural-alignedNSTextAlignmentNatural=4   显示脚本的默认对齐方式

    NSFontAttributeName;                  //字体，value是UIFont对象    NSParagraphStyleAttributeName;        //绘图的风格（居中，换行模式，间距等诸多风格），value是NSParagraphStyle对象    NSForegroundColorAttributeName;       // 文字颜色，value是UIFont对象    NSBackgroundColorAttributeName;       // 背景色，value是UIFont    NSLigatureAttributeName;              //  字符连体，value是NSNumber    NSKernAttributeName;                  // 字符间隔    NSStrikethroughStyleAttributeName;    //删除线，value是NSNumber    NSUnderlineStyleAttributeName;        //下划线，value是NSNumber    NSStrokeColorAttributeName;           //描绘边颜色，value是UIColor    NSStrokeWidthAttributeName;           //描边宽度，value是NSNumber    NSShadowAttributeName;                //阴影，value是NSShadow对象    NSTextEffectAttributeName;            //文字效果，value是NSString    NSAttachmentAttributeName;            //附属，value是NSTextAttachment 对象    NSLinkAttributeName;                  //链接，value是NSURL or NSString    NSBaselineOffsetAttributeName;        //基础偏移量，value是NSNumber对象    NSUnderlineColorAttributeName;        //下划线颜色，value是UIColor对象    NSStrikethroughColorAttributeName;    //删除线颜色，value是UIColor    NSObliquenessAttributeName;           //字体倾斜    NSExpansionAttributeName;             //字体扁平化    NSVerticalGlyphFormAttributeName;     //垂直或者水平，value是 NSNumber，0表示水平，1垂直

/************************************************某区域内************************************************************/NSMutableAttributedString *string = [[NSMutableAttributedString alloc]initWithString:@"0元"]; [string setAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:14]} range:NSMakeRange(string.length-1, 1)]; etlbl.attributedText = string;/************************************************基本用法************************************************************/    NSString *content = @"内容太多，需要自适应才能解决问题，所以需要写这个扩展类,内容太多，需要自适应才能解决问题，所以需要写这个扩展类";    NSMutableAttributedString *string = [[NSMutableAttributedString alloc]initWithString:content];    //字体大小    [string addAttribute:NSFontAttributeName                   value:[UIFont systemFontOfSize:10]                   range:NSMakeRange(0, 1)];    //字体颜色    [string addAttribute:NSForegroundColorAttributeName                   value:[UIColor yellowColor]                   range:NSMakeRange(1, 1)];    //字体背景颜色    [string addAttribute:NSBackgroundColorAttributeName                   value:[UIColor purpleColor]                   range:NSMakeRange(2, 1)];    //添加下划线    [string addAttribute:NSUnderlineStyleAttributeName                   value:@(NSUnderlineStyleSingle)                   range:NSMakeRange(3, 1)];    //添加下划线颜色    [string addAttribute:NSUnderlineColorAttributeName                   value:[UIColor redColor]                   range:NSMakeRange(3, 1)];    UILabel *etlbl3 = [[UILabel alloc]initWithFrame:CGRectMake(100, 400, 200, 30)];    etlbl3.attributedText = string;    [self.view addSubview:etlbl3];

#import <UIKit/UIKit.h>  typedef enum  {      VerticalAlignmentTop = 0, // default      VerticalAlignmentMiddle,      VerticalAlignmentBottom,  } VerticalAlignment;  @interface myUILabel : UILabel  {  @private  VerticalAlignment _verticalAlignment;  }    @property (nonatomic) VerticalAlignment verticalAlignment;    @end  

#import "myUILabel.h"    @implementation myUILabel  @synthesize verticalAlignment = verticalAlignment_;    - (id)initWithFrame:(CGRect)frame {      if (self = [super initWithFrame:frame]) {          self.verticalAlignment = VerticalAlignmentMiddle;      }      return self;  }    - (void)setVerticalAlignment:(VerticalAlignment)verticalAlignment {      verticalAlignment_ = verticalAlignment;      [self setNeedsDisplay];  }    - (CGRect)textRectForBounds:(CGRect)bounds limitedToNumberOfLines:(NSInteger)numberOfLines {      CGRect textRect = [super textRectForBounds:bounds limitedToNumberOfLines:numberOfLines];      switch (self.verticalAlignment) {          case VerticalAlignmentTop:              textRect.origin.y = bounds.origin.y;              break;          case VerticalAlignmentBottom:              textRect.origin.y = bounds.origin.y + bounds.size.height - textRect.size.height;              break;          case VerticalAlignmentMiddle:              // Fall through.          default:              textRect.origin.y = bounds.origin.y + (bounds.size.height - textRect.size.height) / 2.0;      }      return textRect;  }    -(void)drawTextInRect:(CGRect)requestedRect {      CGRect actualRect = [self textRectForBounds:requestedRect limitedToNumberOfLines:self.numberOfLines];      [super drawTextInRect:actualRect];  }      @end  

lbl_mylabel = [[myUILabel alloc] initWithFrame:CGRectMake(20, 50, 150, 600)];  UIColor *color = [UIColor colorWithPatternImage:[UIImage imageNamed:@"halfTransparent.png"]];//使用半透明图片作为label的背景色  lbl_mylabel.backgroundColor = color;  lbl_mylabel.textAlignment = UITextAlignmentLeft;  lbl_mylabel.textColor = UIColor.whiteColor;  lbl_mylabel.lineBreakMode = UILineBreakModeWordWrap;  lbl_mylabel.numberOfLines = 0;  [lbl_mylabel setVerticalAlignment:VerticalAlignmentTop];  [self addSubview:lbl_mylabel]; 

- (CGRect)textRectForBounds:(CGRect)bounds limitedToNumberOfLines:(NSInteger)numberOfLines;- (void)drawTextInRect:(CGRect)rect;