UI----Touch

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView:self.viewL.touchView];
CGPoint point2 = [touch previousLocationInView:self.viewL.touchView];
NSLog(@"%.2f %.2f",point2.x,point2.y);
NSLog(@"%.2f %.2f",point.x,point.y);
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
NSLog(@"结束");
}

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch *touch = [touches anyObject];
CGPoint point1 = [touch locationInView:self.viewL.touchView];
CGPoint point2 = [touch previousLocationInView:self.viewL.touchView];
//    NSLog(@"point1 : %.2f %.2f",point1.x,point1.y);
//    NSLog(@"point2 : %.2f %.2f",point2.x,point2.y);
CGPoint center = self.viewL.touchView.center;
CGFloat x = point1.x - point2.x;
CGFloat y = point1.y - point2.x;
center.x += x;
center.y += y;
//保持在屏幕内移动
//    if (center.x < 100 ) {
//        center.x = 100;
//    }else if (center.x > CGRectGetMaxX(self.viewL.frame) - 100){
//        center.x = CGRectGetMaxX(self.viewL.frame) - 100;
//    }
//    if (center.y < 100) {
//        center.y = 100;
//    }else if (center.y > CGRectGetMaxY(self.viewL.frame) - 100){
//        center.y = CGRectGetMaxY(self.viewL.frame) - 100;
//    }
self.viewL.touchView.center = CGPointMake(center.x, center.y);

//
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event{
NSLog(@"cancel %s",__FUNCTION__);
}