UIResponder类的作用与方法介绍

UIResponder类是UIApplication、UIView、UIViewController的超类。
其实例方法包括：

第一、(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event：

当一个触摸事件结束时发出的UITouch实例对象

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

NSLog(@"touchesEnded");

}

第二、touchesBegan:withEvent:

通知调用者当有一根或者多根手指触摸到了视图或者窗口

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

{

UITouch*touch=[touchesanyObject];

NSUIntegertapCount=touch.tapCount;

if(tapCount ==1)

{

NSLog(@"单击");

}

elseif(tapCount ==2)

{

[NSObjectcancelPreviousPerformRequestsWithTarget:selfselector:@selector(singleTap)object:nil];

NSLog(@"双击");

}

CGPointpoint = [touchlocationInView:self];

NSLog(@"%@",NSStringFromCGPoint(point));

if ([touches count] ==2)

{

NSArray *touchArray = [touches allObjects];

UITouch *firstTouch = [touchArray objectAtIndex:0];

UITouch *secondTouch = [touchArray objectAtIndex:1];

CGPoint point1=[firstTouch locationInView:self];

CGPoint point2=[secondTouch locationInView:self];

NSLog(@"%@",NSStringFromCGPoint(point1));

NSLog(@"%@",NSStringFromCGPoint(point2));

}

}

第三、- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event ：

告诉接收者一个或者多个手指在视图或者窗口上触发移动事件。

self.multipleTouchEnabled =YES; //开启多点触摸

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

{

NSLog(@"touchesMoved");

UITouch*touch=[touchesanyObject];

CGPointpoint=[touchlocationInView:self];

NSLog(@"%@",NSStringFromCGPoint(point));

}

第四、- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event：

通知接收者当系统发出取消事件的时候