[TOC]
## IOS****手势
学习ios手势，先要了解响应链，ios中只要继承UIResponse对象的都能成为事件的响应者，当用户操作手机屏幕时，所操作的控件就是第一响应者，操作事件一步步向下传递（如果该控件不做处理）
- 事件响应链的传播路线：
initial view –> super view –> …..–> view controller –> window –> Application –> AppDelegate
response响应链
- UIResponse的触碰方法：
/**** 触摸事件方法，对触摸事件进行处理 *****/
- (void)touchesBegan:(NSSet *)touches withEvent:(nullableUIEvent*)event;//触摸开始
- (void)touchesMoved:(NSSet *)touches withEvent:(nullableUIEvent*)event;//触摸移动
- (void)touchesEnded:(NSSet *)touches withEvent:(nullableUIEvent*)event;//触摸结束
- (void)touchesCancelled:(nullableNSSet *)touches withEvent:(nullableUIEvent*)event;//触摸取消
ios中主要的手势：
1.UITapGestureRecognizer //单击手势
�点击作为最常用手势，用于按下或选择一个控件或条目（类似于普通的鼠标点击）
/**
添加点击手势
*/
- (void)addTapGestureWithTarget:(id)sender {
//1,tap(点击)
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapGestureAction:)];
//手势点击次数
tapGesture.numberOfTapsRequired = 1;// Default is 1
//点击手指数量
tapGesture.numberOfTouchesRequired = 1;// Default is 1
//将手势识别器添加到view上
[sender addGestureRecognizer:tapGesture];
}
/**
点击手势的响应方法
*/
-(void)tapGestureAction:(UITapGestureRecognizer*)gesture
{
NSLog(@"%s",__FUNCTION__);
UILabel *tempLabel = [self.view viewWithTag:1001];
NSInteger tapCount = gesture.numberOfTapsRequired;//点击次数
NSInteger touchCount = gesture.numberOfTouchesRequired;//手指个数
tempLabel.text = [NSString stringWithFormat:@"手指个数:%ld 点击次数:%ld",(long)touchCount,(long)tapCount];
}
2.UIPanGestureRecognizer //拖动手势
拖动用于实现一些页面的滚动，以及对控件的移动功能。
/**
添加拖拽手势
*/
- (void)addPanGestureWithView:(id)sender {
//2,pan(平移)
UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panGestureAction:)];
panGesture.minimumNumberOfTouches = 1;//最少点击次数---
[sender addGestureRecognizer:panGesture];
}
/**
拖拽手势相应方法
*/
-(void)panGestureAction:(UIPanGestureRecognizer*)gesture
{
switch (gesture.state)
{
//开始
case UIGestureRecognizerStateBegan:
{
NSLog(@"开始");
}
break;
//改变
case UIGestureRecognizerStateChanged:
{
//1,改变redView的frame
UILabel *redView = (UILabel *)gesture.view;
//2,改变的坐标-移动的距离
CGPoint point = [gesture translationInView:redView];
NSLog(@"%@",NSStringFromCGPoint(point));
//3,根据移动的距离改变redView的frame
//CGRectOffset - 根据偏移量改变view的x值和y值
redView.frame = CGRectOffset(redView.frame, point.x, point.y);
//清空偏移量的累加值
[gesture setTranslation:CGPointZero inView:redView];
}
break;
//结束
case UIGestureRecognizerStateEnded:
{
NSLog(@"结束");
}
break;
default:
break;
}
NSLog(@"%s",__FUNCTION__);
}
3.UISwipeGestureRecognizer //轻扫手势
横扫手势用于激活列表项的快捷操作菜单
/**
添加轻扫手势
*/
- (void)addSwipeGestureWithView:(UIView *)aView {
//3,swipe(轻扫)
UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeGestureAction:)];
//8个方向
//direction - 方向
/*
typedef NS_OPTIONS(NSUInteger, UISwipeGestureRecognizerDirection) {
UISwipeGestureRecognizerDirectionRight = 1 << 0,
UISwipeGestureRecognizerDirectionLeft = 1 << 1,
UISwipeGestureRecognizerDirectionUp = 1 << 2,
UISwipeGestureRecognizerDirectionDown = 1 << 3
};
UISwipeGestureRecognizerDirectionLeft|UISwipeGestureRecognizerDirectionUp = 6
UISwipeGestureRecognizerDirectionRight|UISwipeGestureRecognizerDirectionDown = 9
UISwipeGestureRecognizerDirectionLeft|UISwipeGestureRecognizerDirectionDown = 10
UISwipeGestureRecognizerDirectionRight|UISwipeGestureRecognizerDirectionUp = 5
*/
swipeGesture.direction = UISwipeGestureRecognizerDirectionRight;
[aView addGestureRecognizer:swipeGesture];
}
/**
轻扫手势响应方法
*/
-(void)swipeGestureAction:(UISwipeGestureRecognizer*)gesture
{
NSLog(@"%s",__FUNCTION__);
int direction = gesture.direction;
UILabel * tempLabel = (UILabel *)gesture.view;
if (direction == 1) {
tempLabel.text = [NSString stringWithFormat:@"滑动方向：右"];
}else if (direction == 2){
tempLabel.text = [NSString stringWithFormat:@"滑动方向：左"];
}else if (direction == 3){
tempLabel.text = [NSString stringWithFormat:@"滑动方向：上"];
}else if (direction == 4){
tempLabel.text = [NSString stringWithFormat:@"滑动方向：下"];
}
}
4.UIPinchGestureRecognizer //捏合手势
即放大缩小
/**
添加捏合手势
*/
- (void)addPinchGestureWithView:(UIView *)aView {
//4,pinch捏和
UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinchGestureAction:)];
[self.pinchImg addGestureRecognizer:pinchGesture];
}
/**
捏合手势响应方法
*/
-(void)pinchGestureAction:(UIPinchGestureRecognizer*)gesture
{
switch (gesture.state)
{
case UIGestureRecognizerStateBegan:
{
//手势开始
//记录,当前view的frame,作为原始frame
redViewRect = gesture.view.frame;
}
break;
case UIGestureRecognizerStateChanged:
{
//1,拿到view
UIView *redView = gesture.view;
//2,改变view的frame
//scale 缩放后的比例,跟1(原来的frame)
CGFloat dx = CGRectGetWidth(redViewRect)*(1-gesture.scale); //宽度变化量
CGFloat dy = CGRectGetHeight(redViewRect)*(1-gesture.scale);//高度变化量
//dx dy 缩放的偏移量
redView.frame = CGRectInset(redViewRect, dx, dy);
}
break;
case UIGestureRecognizerStateEnded:
{
}
break;
default:
break;
}
}
5.UIScreenEdgePanGestureRecognizer//边缘滑入
滑动用于实现页面的快速滚动和翻页的功能。
/**
添加边缘滑入手势
*/
- (void)addScreenEdgePanGestureWithView:(UIView *)aView {
//5,ScreenEdgePan边缘划入
UIScreenEdgePanGestureRecognizer *sePanGesture = [[UIScreenEdgePanGestureRecognizer alloc]initWithTarget:self action:@selector(seGestureAction:)];
//划入的位置-(边缘的位置)
/*
typedef NS_OPTIONS(NSUInteger, UIRectEdge) {
UIRectEdgeNone = 0,
UIRectEdgeTop = 1 << 0,
UIRectEdgeLeft = 1 << 1,
UIRectEdgeBottom = 1 << 2,
UIRectEdgeRight = 1 << 3,
UIRectEdgeAll = UIRectEdgeTop | UIRectEdgeLeft | UIRectEdgeBottom | UIRectEdgeRight
}*/
sePanGesture.edges = UIRectEdgeLeft;
[aView addGestureRecognizer:sePanGesture];
}
/**
边缘划入响应方法
*/
-(void)seGestureAction:(UIScreenEdgePanGestureRecognizer*)gesture
{
NSLog(@"%s",__FUNCTION__);
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"边缘滑入" message:nil preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *action = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDestructive handler:nil];
[alert addAction:action];
[self presentViewController:alert animated:YES completion:nil];
}
6.UIRotationGestureRecognizer //旋转手势
即将视图围绕中心点转动
/**
添加旋转手势
*/
- (void)addRotationGestureWithView:(UIView *)aView {
//6,rotation旋转
UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotationGestureAction:)];
[aView addGestureRecognizer:rotationGesture];
}
/**
旋转手势响应方法
*/
-(void)rotationGestureAction:(UIRotationGestureRecognizer*)gesture
{
CGFloat rotation = gesture.rotation;//旋转的弧度
CGFloat velocity = gesture.velocity;//旋转速度 (radians/second)
gesture.view.transform = CGAffineTransformMakeRotation(rotation);
UILabel *tempLabel = (UILabel *)gesture.view;
tempLabel.text = [NSString stringWithFormat:@"旋转弧度：%f \n 旋转速度：%f",rotation,velocity];
}
7.UILongPressGestureRecognizer //长按手势
将出现编辑菜单
/**
添加长按手势
*/
- (void)addLongPressGestureWithView:(UIView *)aView {
//7,longPress长按
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressAction:)];
/* numberOfTouchesRequired这个属性保存了有多少个手指点击了屏幕,因此你要确保你每次的点击手指数目是一样的,默认值是为 0. */
longPress.numberOfTouchesRequired = 1;//手指个数
//longPress.minimumPressDuration = 2;//按的最少时长
/*最大100像素的运动是手势识别所允许的 Default is 10.*/
longPress.allowableMovement = 100; //
/*这个参数表示,两次点击之间间隔的时间长度。Default is 0.5.*/
longPress.minimumPressDuration = 1.0;
[aView addGestureRecognizer:longPress];
}
/**
长按相应方法
*/
-(void)longPressAction:(UILongPressGestureRecognizer *)gesture
{
NSLog(@"%s",__FUNCTION__);
//弹出menu
switch (gesture.state) {
case UIGestureRecognizerStateBegan:
{
//UIMenuController menu控制器
//系统的粘贴复制的小弹框
//menuController 单例
UIMenuController *ctr = [UIMenuController sharedMenuController];
/*自定义Menu按钮
//menu按钮
UIMenuItem *mItem = [[UIMenuItem alloc]initWithTitle:@"自定义" action:@selector(longPressMenuAction)];
UIMenuItem *mItem1 = [[UIMenuItem alloc]initWithTitle:@"复制" action:@selector(longPressMenuAction)];
UIMenuItem *mItem2 = [[UIMenuItem alloc]initWithTitle:@"粘贴" action:@selector(longPressMenuAction)];
//将item添加到controller中
ctr.menuItems = [NSArray arrayWithObjects:mItem,mItem1,mItem2,nil];//@[mItem,mItem1,mItem2];
*/
//获得手指点击的位置
CGPoint point = [gesture locationInView:gesture.view];
//设置显示的位置
[ctr setTargetRect:CGRectMake(point.x, point.y, 0, 0) inView:gesture.view];
//显示menu工具条
[ctr setMenuVisible:YES animated:YES];
}
break;
default:
break;
}
}
##****参考文档：
浅谈iOS手势
ios事件处理