touchesMoved运行速度不够快

Question

我希望当用户从左到右滑动时，标签计数器从1更新到5。如果我滑动得很慢，非常慢，它就能工作，比这更快，但它不能工作，对吧？有没有其他方法来实现这一点？

我有这样的代码：

-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];
    gestureStartPoint = [touch locationInView:self.view];
}

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

    UITouch *touch = [touches anyObject];
    CGPoint currentPosition = [touch locationInView:self.view];

    if ((int)(currentPosition.x)%40 == 0 && counter < 5) {
        counter++;
    }

    [label setText:[NSString stringWithFormat:@"%d", counter]];

}

Answer 1

您可以使用UIPanGestureRecognizer...它有像touchEvents一样的开始状态、改变状态和结束状态。

- (void)onDraggingLetter:(UIPanGestureRecognizer *)panGR {

    if (panGR.state == UIGestureRecognizerStateBegan) {

    } else if (panGR.state == UIGestureRecognizerStateChanged) {  

    } else if (panGR.state == UIGestureRecognizerStateEnded) {

    }
}

它可能会帮助你..。