IOS-UIView的移动

- (void)initAdditionalControl
{
self.moveView = [[UIView alloc] initWithFrame:CGRectMake(100, 300, 100, 100)];
self.moveView.backgroundColor = [UIColor redColor];
[self.view addSubview:self.moveView];
}

- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint cup = [touch locationInView:self.moveView];
CGPoint bef = [touch previousLocationInView:self.moveView];
self.moveView.transform = CGAffineTransformTranslate(self.moveView.transform, cup.x - bef.x, cup.y - bef.y);
}