是否有任何功能或算法在绘画时抓住所有的点iPhone
? 像在Android上,在那里我们有gethistoical点。
Answer 1:
检查方法touchesBegan:withEvent:
, touchesMoved:withEvent:
, touchesEnded:withEvent:
和touchesCancelled:withEvent:
来检测运动
例如使用该方法-touchesMoved:withEvent:方法
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [touches anyObject];
CGPoint currentPosition = [touch locationInView:self.view];
NSLog(@"%@", NSStringFromCGPoint(currentPosition));
}
欲了解更多信息检查文件的UIResponder类的
文章来源: Get historcial points ios