概述
ios中对UIResponder对象的定义是一个用于响应和处理事件的抽象接口
属性方法
1、管理响应器
//返回响应器链中的下一个响应器，或者如果没有下一个响应器，则为零
@property(nonatomic, readonly, nullable) UIResponder *nextResponder;
//返回接收下一个响应者，如果没有则为nil
- (nullableUIResponder*)nextResponder;
//是否为第一响应者
@property(nonatomic, readonly) BOOL isFirstResponder;
//返回一个布尔值指出接收者是否是第一个响应者
- (BOOL)isFirstResponder;
//是否可以成为第一响应者，默认为NO
@property(nonatomic, readonly) BOOL canBecomeFirstResponder;
//返回一个布尔值指出接收者是否可以成为第一响应者,默认为NO
- (BOOL)canBecomeFirstResponder;
//请求成为第一响应者
- (BOOL)becomeFirstResponder;
//是否愿意放弃第一响应者状态,默认为YES
@property(nonatomic, readonly) BOOL canResignFirstResponder;
//返回一个布尔值，指示接收者是否愿意放弃第一响应状态,默认为YES
- (BOOL)canResignFirstResponder;
//通知该对象它已被请求在窗口中放弃其作为第一响应者的状态
- (BOOL)resignFirstResponder;
2、响应触摸事件
//一根手指或多根手指触摸屏幕
- (void)touchesBegan:(NSSet *)touches withEvent:(nullable UIEvent *)event;
//一根手指或多根手指在屏幕上移动（随着手指的移动，相关的对象会持续发送该消息）
- (void)touchesMoved:(NSSet *)touches withEvent:(nullable UIEvent *)event;
//一根手指或多根手指离开屏幕
- (void)touchesEnded:(NSSet *)touches withEvent:(nullable UIEvent *)event;
//在触摸操作正常结束前，某个系统事件（如有电话打进来）打断了触摸过程
- (void)touchesCancelled:(NSSet *)touches withEvent:(nullable UIEvent *)event;
//3D 触摸事件
- (void)touchesEstimatedPropertiesUpdated:(NSSet *)touches NS_AVAILABLE_IOS(9_1);
3、响应运动事件
//开始运动
- (void)motionBegan:(UIEventSubtype)motion withEvent:(nullable UIEvent *)event NS_AVAILABLE_IOS(3_0);
//结束运动
- (void)motionEnded:(UIEventSubtype)motion withEvent:(nullable UIEvent *)event NS_AVAILABLE_IOS(3_0);
//取消运动
- (void)motionCancelled:(UIEventSubtype)motion withEvent:(nullable UIEvent *)event NS_AVAILABLE_IOS(3_0);
4、响应新闻事件
//开始按压物理按钮
- (void)pressesBegan:(NSSet *)presses withEvent:(nullable UIPressesEvent *)event NS_AVAILABLE_IOS(9_0);
//当按压相关联的值发生更改时，告知此对象（比如力值变化）
- (void)pressesChanged:(NSSet *)presses withEvent:(nullable UIPressesEvent *)event NS_AVAILABLE_IOS(9_0);
//释放物理按钮（不在按压）
- (void)pressesEnded:(NSSet *)presses withEvent:(nullable UIPressesEvent *)event NS_AVAILABLE_IOS(9_0);
//当系统事件（如低内存警告）取消按压事件时，告诉这个对象
- (void)pressesCancelled:(NSSet *)presses withEvent:(nullable UIPressesEvent *)event NS_AVAILABLE_IOS(9_0);
5、响应远程控制事件
//接收到远程控制事件时通知对象
- (void)remoteControlReceivedWithEvent:(nullable UIEvent *)event NS_AVAILABLE_IOS(4_0);
6、管理输入视图
//自定义输入视图(一般用于替换UITextField和UITextView对象呈现的系统提供的键盘)
@property (nullable, nonatomic, readonly, strong) __kindof UIView *inputView NS_AVAILABLE_IOS(3_2);
//自定义输入视图控制器(一般用于替换UITextField和UITextView对象呈现的系统提供的键盘)
@property (nullable, nonatomic, readonly, strong) UIInputViewController *inputViewController NS_AVAILABLE_IOS(8_0);
//自定义输入附件视图(一般用于添加到UITextField和UITextView对象呈现的系统提供的键盘上)
@property (nullable, nonatomic, readonly, strong) __kindof UIView *inputAccessoryView NS_AVAILABLE_IOS(3_2);
//自定义输入附件视图控制器(一般用于添加到UITextField和UITextView对象呈现的系统提供的键盘上)
@property (nullable, nonatomic, readonly, strong) UIInputViewController *inputAccessoryViewController NS_AVAILABLE_IOS(8_0);
//当对象是第一个响应者时，更新自定义输入和附件视图
- (void)reloadInputViews NS_AVAILABLE_IOS(3_2);
7、获取撤消管理器
@property(nullable, nonatomic,readonly) NSUndoManager *undoManager NS_AVAILABLE_IOS(3_0);
8、验证命令
//请求接收响应器启用或禁用用户界面中的指定命令
- (BOOL)canPerformAction:(SEL)action withSender:(nullable id)sender NS_AVAILABLE_IOS(3_0);
//返回响应操作的目标对象(标识与命令相关联的方法的选择器)
- (nullable id)targetForAction:(SEL)action withSender:(nullable id)sender NS_AVAILABLE_IOS(7_0);
8、访问可用的密钥命令
//响应器上触发动作的键命令
@property (nullable,nonatomic,readonly) NSArray *keyCommands NS_AVAILABLE_IOS(7_0);
9、管理文本输入模式
//响应器对象的文本输入模式
@property (nullable, nonatomic, readonly, strong) UITextInputMode *textInputMode NS_AVAILABLE_IOS(7_0);
//响应器应保存其文本输入模式信息的标识符
@property (nullable, nonatomic, readonly, strong) NSString *textInputContextIdentifier NS_AVAILABLE_IOS(7_0);
//从应用程序的用户默认值清除文本输入模式信息
+ (void)clearTextInputContextIdentifier:(NSString *)identifier NS_AVAILABLE_IOS(7_0);
//在配置键盘快捷键时使用的输入助手
@property (nonnull, nonatomic, readonly, strong) UITextInputAssistantItem *inputAssistantItem NS_AVAILABLE_IOS(9_0) __TVOS_PROHIBITED __WATCHOS_PROHIBITED;
10、支持用户活动
//封装由该响应器支持的用户活动的对象
@property (nullable, nonatomic, strong) NSUserActivity *userActivity NS_AVAILABLE_IOS(8_0);
//恢复继续给定用户活动所需的状态
- (void)restoreUserActivityState:(NSUserActivity *)activity NS_AVAILABLE_IOS(8_0);
//更新给定用户活动的状态
- (void)updateUserActivityState:(NSUserActivity *)activity NS_AVAILABLE_IOS(8_0);
11、标识符方法
//剪切
- (void)cut:(nullable id)sender NS_AVAILABLE_IOS(3_0);
//拷贝
- (void)copy:(nullable id)sender NS_AVAILABLE_IOS(3_0);
//粘贴
- (void)paste:(nullable id)sender NS_AVAILABLE_IOS(3_0);
//选择
- (void)select:(nullable id)sender NS_AVAILABLE_IOS(3_0);
//全选
- (void)selectAll:(nullable id)sender NS_AVAILABLE_IOS(3_0);
//删除
- (void)delete:(nullable id)sender NS_AVAILABLE_IOS(3_2);
// 居左
- (void)makeTextWritingDirectionLeftToRight:(nullable id)sender NS_AVAILABLE_IOS(5_0);
// 居右
- (void)makeTextWritingDirectionRightToLeft:(nullable id)sender NS_AVAILABLE_IOS(5_0);
//切换选定文本的粗体样式信息
- (void)toggleBoldface:(nullable id)sender NS_AVAILABLE_IOS(6_0);
//切换选定文本的斜体风格信息
- (void)toggleItalics:(nullable id)sender NS_AVAILABLE_IOS(6_0);
//切换选定文本的下划线样式信息
- (void)toggleUnderline:(nullable id)sender NS_AVAILABLE_IOS(6_0);
//增加选定文本或其他内容的大小
- (void)increaseSize:(nullable id)sender NS_AVAILABLE_IOS(7_0);
//减少选定文本或其他内容的大小
- (void)decreaseSize:(nullable id)sender NS_AVAILABLE_IOS(7_0);
12、支持的快捷键命令（keyCommands是UIResponder类在ios7后新增的一个只读属性）
typedef NS_OPTIONS(NSInteger,UIKeyModifierFlags) {
// Alppha+Shift键
UIKeyModifierAlphaShift = 1 <<16,
//Shift键
UIKeyModifierShift = 1 <<17,
//Control键
UIKeyModifierControl = 1 <<18,
//Alt键
UIKeyModifierAlternate = 1 <<19,
//Command键
UIKeyModifierCommand = 1 <<20,
//Num键
UIKeyModifierNumericPad = 1 <<21,
}NS_ENUM_AVAILABLE_IOS(7_0);
//初始化对象
- (instancetype)init NS_DESIGNATED_INITIALIZER;
//初始化对象
- (nullable instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER;
//输入字符串
@property (nonatomic,readonly) NSString *input;
//按键调节器
@property (nonatomic,readonly) UIKeyModifierFlags modifierFlags;
//按指定调节器键输入字符串并设置事件
@property (nullable,nonatomic,copy) NSString *discoverabilityTitle NS_AVAILABLE_IOS(9_0);
//创建一个快捷键命令
+ (UIKeyCommand *)keyCommandWithInput:(NSString *)input modifierFlags:(UIKeyModifierFlags)modifierFlags action:(SEL)action;
//创建一个快捷键命令
+ (UIKeyCommand *)keyCommandWithInput:(NSString *)input modifierFlags:(UIKeyModifierFlags)modifierFlags action:(SEL)action discoverabilityTitle:(NSString *)discoverabilityTitle NS_AVAILABLE_IOS(9_0);
13、按键输入箭头指向
//上按键
UIKIT_EXTERN NSString *const UIKeyInputUpArrow NS_AVAILABLE_IOS(7_0);
//下按键
UIKIT_EXTERN NSString *const UIKeyInputDownArrow NS_AVAILABLE_IOS(7_0);
//左按键
UIKIT_EXTERN NSString *const UIKeyInputLeftArrow NS_AVAILABLE_IOS(7_0);
//右按键
UIKIT_EXTERN NSString *const UIKeyInputRightArrow NS_AVAILABLE_IOS(7_0);
//Esc按键
UIKIT_EXTERN NSString *const UIKeyInputEscape NS_AVAILABLE_IOS(7_0);
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