iphone - touchesMoved 工作速度不够快

Question

我希望当用户从左向右滑动时，标签计数器从 1 更新到 5。如果我滑动得很慢，它会很慢地工作，然后再快一点，但它不工作，对吗？还有其他方法可以实现吗？

我有这个代码:

-(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...它有开始状态、更改状态和结束状态，就像 touchEvents...

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

    if (panGR.state == UIGestureRecognizerStateBegan) {

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

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

    }
}

它可能对你有帮助....