iOS触控与手势识别详解-优快云博客

================================================================

//<1> 获取点击按钮点击按钮的字符串名称

NSString *name_str = [NSString stringWithFormat:@"ViewController%d",btn.tag];

// <2>将字符串名称转换成类名

Class name_class = NSClassFromString(name_str);

// <3>创建类名对应的对象

UIViewController *controller = [[name_class alloc] init];

// <4> 设置视图控制器导航条的标题

controller.navigationItem.title = btn.currentTitle;

// <5>进行页面切换

[self.navigationController pushViewController:controller animated:YES];

// 触摸时间包含四个非常重要的方法触摸开始，触摸移动，触摸结束，触摸终至

========================触摸========================================

//<1>触摸开始当你手指触摸屏幕的时候就会触发刚方法

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

UILabel *label1 = (UILabel *)[self.view viewWithTag:1];

UILabel *label2 = (UILabel *)[self.view viewWithTag:2];

label1.text = @"触摸开始";

// <1>获取屏幕上获取触摸手指跟数

int fingerNUm = touches.count;

// <2>获取屏幕触摸屏幕的次数

UITouch *touch = [touches anyObject];

int tapCount = touch.tapCount;

NSString *str = [NSString stringWithFormat:@"%d fingers tap screen %d",fingerNUm ,tapCount];

label2.text = str;

// <3>当前视图吧支持多点触摸必须开启多点触摸这个权限

self.view.multipleTouchEnabled = YES;

}

// <2>触摸移动点击屏幕的手指发生移动的时候就会调用该方法

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event

{

UILabel *label = (UILabel *)[self.view viewWithTag:1];

label.text = @"触摸移动";

}

//<3>触摸结束点击屏幕的手指离开屏幕就会触发该方法

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event

{

UILabel *label = (UILabel *)[self.view viewWithTag:1];

label.text = @"触摸结束";

}

// <4>触摸终止当有电话或者其他信息进入的时候迫使触发终止

-(void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event

{

NSLog(@"触摸终止");

}

========================轻扫========================================

/ 所有手势都继承一个父类叫UIGestureRecognizer

// 所有所有手势都能自动开始视图的多点触摸模式无需手动设置

/ <1>创建轻扫手势对象

UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swiperAction:)];

// <2>设置手指跟数

swipe.numberOfTouchesRequired = 1;

// 默认触摸屏幕的次数为一次

// <3>设置轻扫的方向

// [注意] 一个轻扫手势只能设置一个轻扫方向如果设置多个轻扫方向最后值会将前面设置的值全部覆盖掉

UISwipeGestureRecognizerDirectionRight = 1 << 0,

UISwipeGestureRecognizerDirectionLeft = 1 << 1,

UISwipeGestureRecognizerDirectionUp = 1 << 2,

UISwipeGestureRecognizerDirectionDown = 1 << 3

swipe.direction = UISwipeGestureRecognizerDirectionRight;

// <4>为当前视图添加手势

[self.view addGestureRecognizer:swipe];

是向多中轻扫结合的

-(void)swiperAction:(UISwipeGestureRecognizer *)swipe

{

UILabel *label = (UILabel *)[self.view viewWithTag:100];

// 形参的类型可以是UISwipeGestureRecognizer * 也可以是UIGestureRecognizer * 类型

if (swipe.direction == UISwipeGestureRecognizerDirectionLeft) {

label.text = @"向左扫";

}

else if (swipe.direction == UISwipeGestureRecognizerDirectionRight){

label.text = @"向右轻扫";

}

========================轻击========================================

// 点击

UITapGestureRecognizer *tap1 = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapAtion1:)];

//<1>设置单机屏幕的手指跟数

tap1.numberOfTouchesRequired = 1;

// <2> 设置点击屏幕的次数

tap1.numberOfTapsRequired = 1;

[self.view addGestureRecognizer:tap1];

/ 设置轻击的优先级

[tap1 requireGestureRecognizerToFail:tap2];

========================长按========================================

//<1>创建长按手势的对象

UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressAction:)];

// <2>设置长按的手指跟数

longPress.numberOfTouchesRequired = 1;

// <3>设置长按手势的最短时间

longPress.minimumPressDuration = 1;

[self.view addGestureRecognizer:longPress];

========================捏合===============================

// <1>创建

UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinchAction:)];

改变视图第一种方式

// <1>获取添加手手势的视图

UILabel *label = (UILabel *)pinch.view;

// <2>使视图的宽高等比例改变

label.transform = CGAffineTransformMakeScale(pinch.scale, pinch.scale);

改变视图第二种方式

UIView *view = pinch.view;

view.transform = CGAffineTransformScale(view.transform, pinch.scale, pinch.scale);

// 设置捏合的倍数

pinch.scale = 1.0

========================旋转===============================

// 创建旋转对象

UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotationAtion:)];

// 2 旋转手势手指数默认两根

UILabel *label = (UILabel *)[self.view viewWithTag:100];

[label addGestureRecognizer:rotation];

// 进行旋转一种方式

label.transform = CGAffineTransformMakeRotation(rotation.rotation);

// 第二种方式

view.transform = CGAffineTransformRotate(view.transform, rotation.rotation);

====================多中手势同时器作用==========================

遵守的协议

协议中得方法

/ 同时起作用

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer

{

if (gestureRecognizer.view == otherGestureRecognizer.view) {

return YES;

}

return NO;

}

====================拖拽==========================

//<1>创建拖拽对象

UIPanGestureRecognizer * pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panAction:)];

//<2>获取拖拽路线的方向这个点的x值为正数表示向右拖拽 x值为负数表示向左拖拽

CGPoint tranlition = [pan translationInView:self.view];

//<3>重新设置label的显示位置

label.center = CGPointMake(oldCenter.x + tranlition.x, oldCenter.y + tranlition.y);

/<5>将translition的值置为0 这样就会避免在上一次拖拽的距离后继续累加

if(pan.state == UIGestureRecognizerStateChanged)

{

[pan setTranslation:CGPointZero inView:self.view];

}

====================摇晃事件=====================

- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event

-(void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event

转载于:https://www.cnblogs.com/xzguo/p/4753396.html

手势总结