iOS——UIButton

来源：互联网发布：java 静态导入编辑：程序博客网时间：2024/06/04 20:51

一、概述

1. 说明

UIButton 继承 UIControl（基本控件类）

2. 属性

1）创建 UIButton 对象并使用指定的风格

+ (instancetype)buttonWithType:(UIButtonType)buttonType;

UIButtonType 枚举如下 :

typedef NS_ENUM(NSInteger, UIButtonType) {        UIButtonTypeCustom = 0,                         // 无风格，创建带图片的按钮需要这种风格        UIButtonTypeSystem,                             // 系统风格        UIButtonTypeDetailDisclosure,                   // 显示详细按钮        UIButtonTypeInfoLight,                          // 亮色感叹号按钮        UIButtonTypeInfoDark,                           // 暗色感叹号按钮        UIButtonTypeContactAdd,                         // 加号按钮        UIButtonTypeRoundedRect = UIButtonTypeSystem,   // 圆角按钮，被废弃，使用 UIButtonTypeSystem 代替    };

2）保存 UIButton 对象的风格

@property(nonatomic,readonly)UIButtonType buttonType;

3）获取按钮的标题label(在按钮上有一个label)

@property(nullable,nonatomic,readonly,strong)UILabel * titleLabel;

4）获取按钮的图片视图

@property(nullable,nonatomic,readonly,strong)UIImageView *imageView;

5）设置按钮的标题label 的标题和状态

- (void)setTitle:(nullableNSString *)title forState:(UIControlState)state;

UIControlState 枚举如下 :

typedef NS_OPTIONS(NSUInteger, UIControlState) {        UIControlStateNormal       = 0,          // 正常状态        UIControlStateHighlighted  = 1 << 0,     // 按下状态（当按下按钮时）        UIControlStateDisabled     = 1 << 1,     // 禁用状态（无法响应事件，可以通过 enable 属性设置为 NO 也是此状态）        UIControlStateSelected     = 1 << 2,     // 选中状态（可以响应事件，可以通过 selected 属性设置为 YES 也是此状态）        UIControlStateFocused      = 1 << 3,     // 聚焦状态，iOS9才有        UIControlStateApplication  = 0x00FF0000, // 当用作应用标志时        UIControlStateReserved     = 0xFF000000  //内部框架预留，无意义    };

6）设置按钮的标题label 的颜色和状态

- (void)setTitleColor:(nullableUIColor *)color forState:(UIControlState)state;

7）设置按钮的标题label 的引用颜色和状态

- (void)setTitleShadowColor:(nullableUIColor *)color forState:(UIControlState)state ;

8）设置按钮的图片和状态

- (void)setImage:(nullableUIImage *)image forState:(UIControlState)state;

9）设置背景图片和状态

- (void)setBackgroundImage:(nullableUIImage *)image forState:(UIControlState)state;

10)设置属性标题和状态

- (void)setAttributedTitle:(nullableNSAttributedString *)title forState:(UIControlState)state;

11）返回指定状态的标题

- (nullableNSString *)titleForState:(UIControlState)state;

12）返回指定状态的标题颜色

- (nullableUIColor *)titleColorForState:(UIControlState)state;

13）返回指定状态的标题阴影颜色

- (nullableUIColor *)titleShadowColorForState:(UIControlState)state;

14）返回指定状态的图片

- (nullableUIImage *)imageForState:(UIControlState)state;

15）返回指定状态的背景图片

- (nullableUIImage *)backgroundImageForState:(UIControlState)state;

16）返回指定状态的属性字符串

- (nullableNSAttributedString *)attributedTitleForState:(UIControlState)state;

17）返回当前状态的标题

@property(nullable,nonatomic,readonly,strong)NSString *currentTitle;

17）返回当前状态的标题颜色

@property(nonatomic,readonly,strong)UIColor *currentTitleColor;

19）返回当前状态的标题阴影颜色

@property(nullable,nonatomic,readonly,strong)UIColor *currentTitleShadowColor;

20）返回当前状态的图片

@property(nullable,nonatomic,readonly,strong)UIImage *currentImage;

21）返回当前状态的背景图片

@property(nullable,nonatomic,readonly,strong)UIImage *currentBackgroundImage;

22）返回当前状态的属性字符串

@property(nullable,nonatomic,readonly,strong)NSAttributedString *currentAttributedTitle;

0 0