手势总结
================================================================
//<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
<UIGestureRecognizerDelegate>
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
