ios开发 之 UIResponder详解
2017-05-12 17:24
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在iOS中UIResponder类是专门用来响应用户的操作处理各种事件的,包括触摸事件(Touch Events)、运动事件(Motion Events)、远程控制事件(Remote Control Events)。我们知道UIApplication、UIView、UIViewController这几个类是直接继承自UIResponder,所以这些类都可以响应事件。当然我们自定义的继承自UIView的View以及自定义的继承自UIViewController的控制器都可以响应事件。本文将详细介绍UIResponder类。
原文地址:http://blog.csdn.net/zeng_zhiming/article/details/71747881
通过响应链查找视图控制器,nextResponder获取下一个响应者,响应者顺序为:
耳机线控要注意三点要素:
(1)启动接受远程事件:[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
(2)设置成为第一响应者(UIViewController,AppDelegate中不需要设置)
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(3)获取音频的控制权
(1)启用用户交互:self.userInteractionEnabled = YES;
(2)在显示菜单之前设置对象成为第一响应者(UIViewController,AppDelegate中不需要设置)
(3)返回菜单需要显示的按钮,并重写实现对应方法
(1)在调用方法时需要添加注册一个对应的撤销方法
(1)设置对象成为第一响应者(UIViewController,AppDelegate中不需要设置)
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Demo地址:https://github.com/zeng-zhiming/ZMResponderDemo
原文地址:http://blog.csdn.net/zeng_zhiming/article/details/71747881
原文地址:http://blog.csdn.net/zeng_zhiming/article/details/71747881
一、使用详解
1、通过响应者链查找视图的视图控制器
/** * 查找视图的视图控制器 * * @param view 视图 * * @return 返回视图的控制器 */ - (UIViewController *)getControllerFromView:(UIView *)view { // 遍历响应者链。返回第一个找到视图控制器 UIResponder *responder = view; while ((responder = [responder nextResponder])){ if ([responder isKindOfClass: [UIViewController class]]){ return (UIViewController *)responder; } } // 如果没有找到则返回nil return nil; }
通过响应链查找视图控制器,nextResponder获取下一个响应者,响应者顺序为:
2、设置与取消第一响应者
// // ZMFirstResponderView.m // ZMResponderDemo // // Created by ZengZhiming on 2017/5/12. // Copyright © 2017年 菜鸟基地. All rights reserved. // #import "ZMFirstResponderView.h" @implementation ZMFirstResponderView /** 演示设置为第一响应者 */ - (void)setBecomeFirstResponder { // 判断对象是否已经是第一响应者 if ([self isFirstResponder]) { return; } // 判断对象是否允许成为第一响应者 if ([self canBecomeFirstResponder]) { // 设置成为第一响应者 [self becomeFirstResponder]; } } /** 演示放弃第一响应者 */ - (void)setResignFirstResponder { // 判断对象是否不是第一响应者 if (![self isFirstResponder]) { return; } // 判断对象是否允许放弃第一响应者 if ([self canResignFirstResponder]) { // 设置放弃第一响应者 [self resignFirstResponder]; } } /** 重写方法,允许对象成为第一响应者 */ - (BOOL)canBecomeFirstResponder { return YES; } @endUIView默认不允许设置为第一响应者,因此设置UIView为第一响应者需要重写canBecomeFirstResponder方法并返回YES。 设置为第一响应者后,对象则可以接受远程控制事件进行处理(如耳机线控)。UITextField、UITextView成为第一响应者后会弹出输入键盘,取消第一响应者则会隐藏输入键盘。
3、触摸相关方法,一般用于响应屏幕触摸
/** 手指按下时响应 */ - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event { [super touchesBegan:touches withEvent:event]; NSLog(@"--->手指按下时响应"); } /** 手指移动时响应 */ - (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event { [super touchesMoved:touches withEvent:event]; NSLog(@"--->手指移动时响应"); } /** 手指抬起时响应 */ - (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event { [super touchesEnded:touches withEvent:event]; NSLog(@"--->手指抬起时响应"); } /** 触摸取消(意外中断, 如:电话, Home键退出等) */ - (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event { [super touchesCancelled:touches withEvent:event]; NSLog(@"--->取消触摸响应"); }
4、加速相关方法,一般用于摇一摇、运动事件监听等
/** 开始加速 */ - (void)motionBegan:(UIEventSubtype)motion withEvent:(nullable UIEvent *)event NS_AVAILABLE_IOS(3_0) { [super motionBegan:motion withEvent:event]; NSLog(@"--->开始加速"); } /** 结束加速 */ - (void)motionEnded:(UIEventSubtype)motion withEvent:(nullable UIEvent *)event NS_AVAILABLE_IOS(3_0) { [super motionEnded:motion withEvent:event]; NSLog(@"--->结束加速"); } /** 加速取消(意外中断, 如:电话, Home键退出等) */ - (void)motionCancelled:(UIEventSubtype)motion withEvent:(nullable UIEvent *)event NS_AVAILABLE_IOS(3_0) { [super motionCancelled:motion withEvent:event]; NSLog(@"--->加速取消"); }
5、远程控制方法,一般用于耳机线控
// // ZMAudioView.m // ZMResponderDemo // // Created by ZengZhiming on 2017/5/12. // Copyright © 2017年 菜鸟基地. All rights reserved. // #import "ZMAudioView.h" #import <AVFoundation/AVFoundation.h> @implementation ZMAudioView - (instancetype)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { // 启动接受远程事件 [[UIApplication sharedApplication] beginReceivingRemoteControlEvents]; // 设置成为第一响应者 [self becomeFirstResponder]; // 播放一段静音文件,使APP获取音频的控制权 NSURL *audioURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"mute_60s" ofType:@"mp3"]]; AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:audioURL error:nil]; [audioPlayer play]; } return self; } /** 允许对象成为第一响应者 */ - (BOOL)canBecomeFirstResponder { return YES; } /** 远程控制事件响应 */ - (void)remoteControlReceivedWithEvent:(UIEvent *)receivedEvent { NSLog(@"--->耳机线控响应"); } - (void)dealloc { // 停止接受远程事件 [[UIApplication sharedApplication] endReceivingRemoteControlEvents]; // 放弃第一响应者 [self resignFirstResponder]; } @end
耳机线控要注意三点要素:
(1)启动接受远程事件:[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
(2)设置成为第一响应者(UIViewController,AppDelegate中不需要设置)
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// 设置成为第一响应者 [self becomeFirstResponder]; /** 允许对象成为第一响应者 */ - (BOOL)canBecomeFirstResponder { return YES; }
(3)获取音频的控制权
// 播放一段静音文件,使APP获取音频的控制权 NSURL *audioURL = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"mute_60s" ofType:@"mp3"]]; AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:audioURL error:nil]; [audioPlayer play];
6、在UILabel中实现长按菜单(复制、粘贴等)
// // ZMMenuLabel.m // ZMResponderDemo // // Created by ZengZhiming on 2017/5/15. // Copyright © 2017年 菜鸟基地. All rights reserved. // #import "ZMMenuLabel.h" @implementation ZMMenuLabel - (instancetype)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { // 启用用户交互 self.userInteractionEnabled = YES; // 添加长按手势 UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressMenu:)]; longPressGesture.minimumPressDuration = 0.2; [self addGestureRecognizer:longPressGesture]; } return self; } /** 允许对象成为第一响应者 */ - (BOOL)canBecomeFirstResponder { return YES; } /** 长按响应 */ - (void)longPressMenu:(UILongPressGestureRecognizer *)sender { if (sender.state == UIGestureRecognizerStateBegan) { // 设置成为第一响应者 [self becomeFirstResponder]; // 显示菜单 UIMenuController *menuCtrl = [UIMenuController sharedMenuController]; [menuCtrl setTargetRect:self.frame inView:self.superview]; [menuCtrl setMenuVisible:YES animated:YES]; } } /** 返回需要显示的菜单按钮 */ - (BOOL)canPerformAction:(SEL)action withSender:(id)sender { // 只显示复制、粘贴按钮 if (action == @selector(copy:) || action == @selector(paste:)) { return YES; } return NO; } /** 实现复制方法 */ - (void)copy:(id)sender { UIPasteboard *paste = [UIPasteboard generalPasteboard]; paste.string = self.text; } /** 实现粘贴方法 */ - (void)paste:(id)sender { UIPasteboard *paste = [UIPasteboard generalPasteboard]; self.text = paste.string; } @end为UILabel添加长按菜单需要注意几点:
(1)启用用户交互:self.userInteractionEnabled = YES;
(2)在显示菜单之前设置对象成为第一响应者(UIViewController,AppDelegate中不需要设置)
/** 允许对象成为第一响应者 */ - (BOOL)canBecomeFirstResponder { return YES; } // 设置成为第一响应者 [self becomeFirstResponder];
(3)返回菜单需要显示的按钮,并重写实现对应方法
/** 返回需要显示的菜单按钮 */ - (BOOL)canPerformAction:(SEL)action withSender:(id)sender { // 只显示复制、粘贴按钮 if (action == @selector(copy:) || action == @selector(paste:)) { return YES; } return NO; } /** 实现复制方法 */ - (void)copy:(id)sender { UIPasteboard *paste = [UIPasteboard generalPasteboard]; paste.string = self.text; } /** 实现粘贴方法 */ - (void)paste:(id)sender { UIPasteboard *paste = [UIPasteboard generalPasteboard]; self.text = paste.string; }(4)注册长按手势,显示菜单
// 添加长按手势 UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressMenu:)]; longPressGesture.minimumPressDuration = 0.2; [self addGestureRecognizer:longPressGesture]; /** 长按响应 */ - (void)longPressMenu:(UILongPressGestureRecognizer *)sender { if (sender.state == UIGestureRecognizerStateBegan) { // 设置成为第一响应者 [self becomeFirstResponder]; // 显示菜单 UIMenuController *menuCtrl = [UIMenuController sharedMenuController]; [menuCtrl setTargetRect:self.frame inView:self.superview]; [menuCtrl setMenuVisible:YES animated:YES]; } }
7、使用NSUndoManager实现画板撤销/重做功能
/** ==============ZMDrawingBoardView.h文件=================== */ #import <UIKit/UIKit.h> /** 画板View */ @interface ZMDrawingBoardView : UIView @end /** 划线Model */ @interface ZMLineModel : NSObject @property (nonatomic) CGPoint begin; @property (nonatomic) CGPoint end; @end /** ==============ZMDrawingBoardView.m文件=================== */ #import "ZMDrawingBoardView.h" /** 画板View */ @interface ZMDrawingBoardView () @property (nonatomic, strong) ZMLineModel *currentLine; @property (nonatomic, strong) NSMutableArray<ZMLineModel *> *toucheArray; @end @implementation ZMDrawingBoardView - (instancetype)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { [self initSubView]; self.backgroundColor = [UIColor whiteColor]; self.toucheArray = [NSMutableArray array]; } return self; } /** 绘制画板 */ - (void)drawRect:(CGRect)rect { // 获得上下文 CGContextRef context = UIGraphicsGetCurrentContext(); // 设置样式 CGContextSetLineCap(context, kCGLineCapSquare); // 设置宽度 CGContextSetLineWidth(context, 5.0); // 设置颜色 CGContextSetStrokeColorWithColor(context, [[UIColor redColor] CGColor]); for (ZMLineModel *line in self.toucheArray) { // 开始绘制 CGContextBeginPath(context); // 移动画笔到起点 CGContextMoveToPoint(context, line.begin.x, line.begin.y); // 添加下一点 CGContextAddLineToPoint(context, line.end.x, line.end.y); // 绘制完成 CGContextStrokePath(context); } } /** 划线开始 */ - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { // 标记开始撤销分组 [self.undoManager beginUndoGrouping]; for (UITouch *touch in touches) { // 记录起始点 CGPoint locTouch = [touch locationInView:self]; _currentLine = [[ZMLineModel alloc] init]; _currentLine.begin = locTouch; _currentLine.end = locTouch; } } /** 划线移动 */ - (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event { for (UITouch *touch in touches) { // 添加线条 CGPoint locTouch = [touch locationInView:self]; _currentLine.end = locTouch; [self addLine:_currentLine]; // 当前线条 _currentLine = [[ZMLineModel alloc] init]; _currentLine.begin = locTouch; _currentLine.end = locTouch; } } /** 划线结束 */ - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { // 结束标记撤销分组 [self.undoManager endUndoGrouping]; } /** 添加划线 */ - (void)addLine:(ZMLineModel *)line { // 添加划线并重绘画板 [self.toucheArray addObject:line]; [self setNeedsDisplay]; // 注册撤销方法 [[self.undoManager prepareWithInvocationTarget:self] removeLine:line]; } /** 移除划线 */ - (void)removeLine:(ZMLineModel *)line { if ([self.toucheArray containsObject:line]) { // 移除划线并重绘画板 [self.toucheArray removeObject:line]; [self setNeedsDisplay]; // 注册撤销方法 [[self.undoManager prepareWithInvocationTarget:self] addLine:line]; } } /** 撤销按钮点击响应 */ - (void)undoButtonAction:(id)sender { if ([self.undoManager canUndo]) { [self.undoManager undo]; } } /** 重做按钮点击响应 */ - (void)redoButtonAction:(id)sender { if ([self.undoManager canRedo]) { [self.undoManager redo]; } } /** 初始化子控件 */ - (void)initSubView { // 撤销按钮 UIButton *undoButton = [UIButton buttonWithType:UIButtonTypeSystem]; undoButton.frame = CGRectMake(0, 64, 70, 50); [undoButton setTitle:@"undo撤销" forState:UIControlStateNormal]; [undoButton sizeToFit]; [undoButton addTarget:self action:@selector(undoButtonAction:) forControlEvents:UIControlEventTouchUpInside]; [self addSubview:undoButton]; // 重做按钮 UIButton *redoButton = [UIButton buttonWithType:UIButtonTypeSystem]; redoButton.frame = CGRectMake(CGRectGetWidth(self.frame)-70, 64, 70, 50); [redoButton setTitle:@"redo重做" forState:UIControlStateNormal]; [redoButton sizeToFit]; [redoButton addTarget:self action:@selector(redoButtonAction:) forControlEvents:UIControlEventTouchUpInside]; [self addSubview:redoButton]; } @end实现撤销/重做注意以下几点:
(1)在调用方法时需要添加注册一个对应的撤销方法
// 注册撤销方法 [[self.undoManager prepareWithInvocationTarget:self] removeLine:line];(2)撤销/ 重做只需要调用undoManager中的相应方法即可
/** 撤销按钮点击响应 */ - (void)undoButtonAction:(id)sender { if ([self.undoManager canUndo]) { [self.undoManager undo]; } } /** 重做按钮点击响应 */ - (void)redoButtonAction:(id)sender { if ([self.undoManager canRedo]) { [self.undoManager redo]; } }(3)如果需要多个动作一起撤销则需要标记分组
// 标记开始撤销分组 [self.undoManager beginUndoGrouping]; // 结束标记撤销分组 [self.undoManager endUndoGrouping];
8、自定义快捷键
// // ZMKeyCommandView.m // ZMResponderDemo // // Created by ZengZhiming on 2017/5/17. // Copyright © 2017年 菜鸟基地. All rights reserved. // #import "ZMKeyCommandView.h" @implementation ZMKeyCommandView - (instancetype)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { // 设置成为第一响应者 [self becomeFirstResponder]; } return self; } /** 允许对象成为第一响应者 */ - (BOOL)canBecomeFirstResponder { return YES; } /** 返回快捷命令数组 */ -(NSArray<UIKeyCommand *> *)keyCommands { return @[ [UIKeyCommand keyCommandWithInput:UIKeyInputEscape modifierFlags:UIKeyModifierShift action:@selector(pressedShiftAndEscapeKey:) discoverabilityTitle:@"自定义[Shift+Esc]快捷键"], [UIKeyCommand keyCommandWithInput:@"a" modifierFlags:UIKeyModifierShift action:@selector(pressedShiftAndAKey:) discoverabilityTitle:@"自定义[Shift+A]快捷键"] ]; } /** Shift+Esc快捷命令响应 */ -(void)pressedShiftAndEscapeKey:(UIKeyCommand *)keyCommand { UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:keyCommand.discoverabilityTitle message:[NSString stringWithFormat:@"按下快捷辅键:[%@]", keyCommand.input] delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil]; [alertView show]; } /** Shift+A快捷命令响应 */ -(void)pressedShiftAndAKey:(UIKeyCommand *)keyCommand { UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:keyCommand.discoverabilityTitle message:[NSString stringWithFormat:@"按下快捷辅键:[%@]", keyCommand.input] delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil]; [alertView show]; } @end自定义快捷键需要注意两点:
(1)设置对象成为第一响应者(UIViewController,AppDelegate中不需要设置)
// 设置成为第一响应者 [self becomeFirstResponder]; /** 允许对象成为第一响应者 */ - (BOOL)canBecomeFirstResponder { return YES; }(2)重写keyCommands返回快捷命令组合
/** 返回快捷命令数组 */ -(NSArray<UIKeyCommand *> *)keyCommands { return @[ [UIKeyCommand keyCommandWithInput:UIKeyInputEscape modifierFlags:UIKeyModifierShift action:@selector(pressedShiftAndEscapeKey:) discoverabilityTitle:@"自定义[Shift+Esc]快捷键"], [UIKeyCommand keyCommandWithInput:@"a" modifierFlags:UIKeyModifierShift action:@selector(pressedShiftAndAKey:) discoverabilityTitle:@"自定义[Shift+A]快捷键"] ]; }
9、自定义UITextField输入键盘
// // ZMCustomInputView.m // ZMResponderDemo // // Created by ZengZhiming on 2017/5/18. // Copyright © 2017年 菜鸟基地. All rights reserved. // #import "ZMCustomInputView.h" #define MAIN_SCREEN_WIDTH [[UIScreen mainScreen] bounds].size.width //!< 屏幕的Width @interface ZMCustomInputView () @property (nonatomic, strong) UITextField *textField; @property (nonatomic, strong) UIView *customInputView; @property (nonatomic, strong) UIToolbar *customAccessoryView; @end @implementation ZMCustomInputView - (instancetype)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { // 添加TextField [self addSubview:self.textField]; } return self; } /** 懒加载textField */ - (UITextField *)textField { if (!_textField) { // 初始化textField _textField = [[UITextField alloc]initWithFrame:CGRectMake(50, 100, MAIN_SCREEN_WIDTH - 100, 30)]; _textField.borderStyle = UITextBorderStyleRoundedRect; _textField.placeholder = @"测试"; // 设置自定义键盘View _textField.inputView = self.customInputView; _textField.inputAccessoryView = self.customAccessoryView; } return _textField; } /** 懒加载customInputView */ - (UIView *)customInputView { if (!_customInputView) { _customInputView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, MAIN_SCREEN_WIDTH, 220)]; _customInputView.backgroundColor = [UIColor lightGrayColor]; UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(0, 100, MAIN_SCREEN_WIDTH, 40)]; label.textAlignment = NSTextAlignmentCenter; label.text = @"自定义inputView"; [_customInputView addSubview:label]; } return _customInputView; } /** 懒加载customAccessoryView */ - (UIToolbar *)customAccessoryView { if (!_customAccessoryView) { _customAccessoryView = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, MAIN_SCREEN_WIDTH, 40)]; _customAccessoryView.barTintColor = [UIColor orangeColor]; UIBarButtonItem *space = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil]; UIBarButtonItem *done = [[UIBarButtonItem alloc]initWithTitle:@"完成" style:UIBarButtonItemStyleDone target:self action:@selector(done)]; [_customAccessoryView setItems:@[space, space, done]]; } return _customAccessoryView; } /** 响应完成按钮 */ - (void)done { [self.textField resignFirstResponder]; } @end
二、UIResponder.h详解
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// // UIResponder.h // ZMHeaderFile // // Created by ZengZhiming on 2017/4/18. // Copyright © 2017年 菜鸟基地. All rights reserved. // // 详解 UIResponder.h // Version iOS 10.3 // #import <Foundation/Foundation.h> #import <UIKit/UIKitDefines.h> #import <UIKit/UIEvent.h> NS_ASSUME_NONNULL_BEGIN @class UIPress; @class UIPressesEvent; #pragma mark - UIResponderStandardEditActions协议定义 @protocol UIResponderStandardEditActions <NSObject> @optional /** 剪切事件 */ - (void)cut:(nullable id)sender NS_AVAILABLE_IOS(3_0); /** 复制事件 */ - (void)copy:(nullable id)sender NS_AVAILABLE_IOS(3_0); /** 粘贴事件 */ - (void)paste:(nullable id)sender NS_AVAILABLE_IOS(3_0); /** 选择事件 */ - (void)select:(nullable id)sender NS_AVAILABLE_IOS(3_0); /** 全选事件 */ - (void)selectAll:(nullable id)sender NS_AVAILABLE_IOS(3_0); /** 删除事件 */ - (void)delete:(nullable id)sender NS_AVAILABLE_IOS(3_2); /** 从左到右写入字符串(居左) */ - (void)makeTextWritingDirectionLeftToRight:(nullable id)sender NS_AVAILABLE_IOS(5_0); /** 从右到左写入字符串(居右) */ - (void)makeTextWritingDirectionRightToLeft:(nullable id)sender NS_AVAILABLE_IOS(5_0); /** 切换字体为黑体(粗体) */ - (void)toggleBoldface:(nullable id)sender NS_AVAILABLE_IOS(6_0); /** 切换字体为斜体 */ - (void)toggleItalics:(nullable id)sender NS_AVAILABLE_IOS(6_0); /** 给文字添加下划线 */ - (void)toggleUnderline:(nullable id)sender NS_AVAILABLE_IOS(6_0); /** 增加字体大小 */ - (void)increaseSize:(nullable id)sender NS_AVAILABLE_IOS(7_0); /** 减小字体大小 */ - (void)decreaseSize:(nullable id)sender NS_AVAILABLE_IOS(7_0); @end #pragma mark - UIResponder类定义 NS_CLASS_AVAILABLE_IOS(2_0) @interface UIResponder : NSObject <UIResponderStandardEditActions> #pragma mark - 响应者相关方法 /** 获取下一个响应者 */ #if UIKIT_DEFINE_AS_PROPERTIES @property(nonatomic, readonly, nullable) UIResponder *nextResponder; #else - (nullable UIResponder *)nextResponder; #endif /** 是否允许成为第一响应者。默认返回NO */ #if UIKIT_DEFINE_AS_PROPERTIES @property(nonatomic, readonly) BOOL canBecomeFirstResponder; #else - (BOOL)canBecomeFirstResponder; #endif /** 设置成为第一响应者 */ - (BOOL)becomeFirstResponder; /** 是否允许放弃第一响应者。默认返回YES */ #if UIKIT_DEFINE_AS_PROPERTIES @property(nonatomic, readonly) BOOL canResignFirstResponder; #else - (BOOL)canResignFirstResponder; #endif /** 设置放弃第一响应者 */ - (BOOL)resignFirstResponder; /** 判断对象是否是第一响应者 */ #if UIKIT_DEFINE_AS_PROPERTIES @property(nonatomic, readonly) BOOL isFirstResponder; #else - (BOOL)isFirstResponder; #endif #pragma mark - 触摸相关方法,一般用于响应屏幕触摸 /** 手指按下时响应 */ - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event; /** 手指移动时响应 */ - (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event; /** 手指抬起时响应 */ - (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event; /** 取消(意外中断, 如:电话, 系统警告窗等) */ - (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(nullable UIEvent *)event; /** 3DTouch响应(iOS9.1后使用) */ - (void)touchesEstimatedPropertiesUpdated:(NSSet<UITouch *> *)touches NS_AVAILABLE_IOS(9_1); #pragma mark - 深按相关方法,一般用于遥控器按键响应 /** 手指按压开始时响应 */ - (void)pressesBegan:(NSSet<UIPress *> *)presses withEvent:(nullable UIPressesEvent *)event NS_AVAILABLE_IOS(9_0); /** 手指按压位置移动时响应 */ - (void)pressesChanged:(NSSet<UIPress *> *)presses withEvent:(nullable UIPressesEvent *)event NS_AVAILABLE_IOS(9_0); /** 手指抬起接受按压时响应 */ - (void)pressesEnded:(NSSet<UIPress *> *)presses withEvent:(nullable UIPressesEvent *)event NS_AVAILABLE_IOS(9_0); /** 按压取消(意外中断, 如:电话, 系统警告窗等) */ - (void)pressesCancelled:(NSSet<UIPress *> *)presses withEvent:(nullable UIPressesEvent *)event NS_AVAILABLE_IOS(9_0); #pragma mark - 加速相关方法,一般用于摇一摇、运动事件监听等 /** 开始加速 */ - (void)motionBegan:(UIEventSubtype)motion withEvent:(nullable UIEvent *)event NS_AVAILABLE_IOS(3_0); /** 结束加速 */ - (void)motionEnded:(UIEventSubtype)motion withEvent:(nullable UIEvent *)event NS_AVAILABLE_IOS(3_0); /** 加速取消(意外中断, 如:电话, 系统警告窗等) */ - (void)motionCancelled:(UIEventSubtype)motion withEvent:(nullable UIEvent *)event NS_AVAILABLE_IOS(3_0); /** 远程控制事件 */ - (void)remoteControlReceivedWithEvent:(nullable UIEvent *)event NS_AVAILABLE_IOS(4_0); /** 返回UIMenuController需要显示的控件(如:复制,粘贴等) */ - (BOOL)canPerformAction:(SEL)action withSender:(nullable id)sender NS_AVAILABLE_IOS(3_0); /** 返回响应的操作目标对象 */ - (nullable id)targetForAction:(SEL)action withSender:(nullable id)sender NS_AVAILABLE_IOS(7_0); /** 获取响应链就近共享撤消管理 */ @property(nullable, nonatomic,readonly) NSUndoManager *undoManager NS_AVAILABLE_IOS(3_0); @end /** 快捷主键枚举 */ typedef NS_OPTIONS(NSInteger, UIKeyModifierFlags) { UIKeyModifierAlphaShift = 1 << 16, //!< Alpha+Shift键. UIKeyModifierShift = 1 << 17, //!< Shift键. UIKeyModifierControl = 1 << 18, //!< Control键. UIKeyModifierAlternate = 1 << 19, //!< Alt键. UIKeyModifierCommand = 1 << 20, //!< Command键. UIKeyModifierNumericPad = 1 << 21, //!< Num键. } NS_ENUM_AVAILABLE_IOS(7_0); #pragma mark - 快捷键对象 NS_CLASS_AVAILABLE_IOS(7_0) @interface UIKeyCommand : NSObject <NSCopying, NSSecureCoding> /** 初始化对象 */ - (instancetype)init NS_DESIGNATED_INITIALIZER; /** 初始化对象 */ - (nullable instancetype)initWithCoder:(NSCoder *)aDecoder NS_DESIGNATED_INITIALIZER; /** 获取快捷辅键(如快捷命令【Command+A】中的 A 键) */ @property (nonatomic,readonly) NSString *input; /** 获取快捷主键(如快捷命令【Command+A】中的 Command 键) */ @property (nonatomic,readonly) UIKeyModifierFlags modifierFlags; /** 显示给用户的快捷键标题 */ @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); @end #pragma mark - 响应快捷命令 @interface UIResponder (UIResponderKeyCommands) /** 返回快捷键命令数组 */ @property (nullable,nonatomic,readonly) NSArray<UIKeyCommand *> *keyCommands NS_AVAILABLE_IOS(7_0); @end @class UIInputViewController; @class UITextInputMode; @class UITextInputAssistantItem; #pragma mark - 输入视图 @interface UIResponder (UIResponderInputViewAdditions) /** 键盘输入视图(系统默认的,可以自定义) */ @property (nullable, nonatomic, readonly, strong) __kindof UIView *inputView NS_AVAILABLE_IOS(3_2); /** 弹出键盘时附带的视图 */ @property (nullable, nonatomic, readonly, strong) __kindof UIView *inputAccessoryView NS_AVAILABLE_IOS(3_2); /** 输入助手配置键盘的快捷方式栏时使用 */ @property (nonnull, nonatomic, readonly, strong) UITextInputAssistantItem *inputAssistantItem NS_AVAILABLE_IOS(9_0) __TVOS_PROHIBITED __WATCHOS_PROHIBITED; /** 键盘输入视图控制器 */ @property (nullable, nonatomic, readonly, strong) UIInputViewController *inputViewController NS_AVAILABLE_IOS(8_0); /** 弹出键盘时附带的视图的视图控制器 */ @property (nullable, nonatomic, readonly, strong) UIInputViewController *inputAccessoryViewController NS_AVAILABLE_IOS(8_0); /** 文本输入模式 */ @property (nullable, nonatomic, readonly, strong) UITextInputMode *textInputMode NS_AVAILABLE_IOS(7_0); /** 文本输入模式标识 */ @property (nullable, nonatomic, readonly, strong) NSString *textInputContextIdentifier NS_AVAILABLE_IOS(7_0); /** 根据设置的标识清除指定的文本输入模式 */ + (void)clearTextInputContextIdentifier:(NSString *)identifier NS_AVAILABLE_IOS(7_0); /** 重新刷新键盘输入视图 */ - (void)reloadInputViews NS_AVAILABLE_IOS(3_2); @end /** 特殊快捷辅键定义 */ UIKIT_EXTERN NSString *const UIKeyInputUpArrow NS_AVAILABLE_IOS(7_0); //!< 上按键. UIKIT_EXTERN NSString *const UIKeyInputDownArrow NS_AVAILABLE_IOS(7_0); //!< 下按键. UIKIT_EXTERN NSString *const UIKeyInputLeftArrow NS_AVAILABLE_IOS(7_0); //!< 左按键. UIKIT_EXTERN NSString *const UIKeyInputRightArrow NS_AVAILABLE_IOS(7_0); //!< 右按键 UIKIT_EXTERN NSString *const UIKeyInputEscape NS_AVAILABLE_IOS(7_0); //!< Esc按键. #pragma mark - 响应者活动 @interface UIResponder (ActivityContinuation) /** 用户活动 */ @property (nullable, nonatomic, strong) NSUserActivity *userActivity NS_AVAILABLE_IOS(8_0); /** 更新用户活动 */ - (void)updateUserActivityState:(NSUserActivity *)activity NS_AVAILABLE_IOS(8_0); /** 恢复用户活动 */ - (void)restoreUserActivityState:(NSUserActivity *)activity NS_AVAILABLE_IOS(8_0); @end NS_ASSUME_NONNULL_END
Demo地址:https://github.com/zeng-zhiming/ZMResponderDemo
原文地址:http://blog.csdn.net/zeng_zhiming/article/details/71747881
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