Question

我在基于标签的应用程序中使用简单的Textview来显示一些文本:)我使用以下代码找出了如何更改动画文本：

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint currentTouchPosition = [touch locationInView:self];

// To be a swipe, direction of touch must be horizontal and long enough.
if (fabsf(startTouchPosition.x - currentTouchPosition.x) >= HORIZ_SWIPE_DRAG_MIN &&
    fabsf(startTouchPosition.y - currentTouchPosition.y) <= VERT_SWIPE_DRAG_MAX)
{
    // It appears to be a swipe.
    if (startTouchPosition.x < currentTouchPosition.x){
        NSString *string = [[NSString alloc]initWithFormat:@"..."];
        self.text = string;
    }
    else{
        CGContextRef context = UIGraphicsGetCurrentContext();
        [UIView beginAnimations:nil context:context];
        //[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:[self superview] cache:YES];
        [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:[self superview] cache:YES];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
        [UIView setAnimationDuration:0.5];
        [[self superview] exchangeSubviewAtIndex:0 withSubviewAtIndex:1];
        [UIView commitAnimations];
        [self displayNewText];
    }
}

但是现在UIViewAnimationTransition中定义了“幻灯片转换”。我知道分页，但我不想用它。检测水平滑动时是否还有其他可能的水平幻灯片动画？

Answer 1

我想你差不多了。拦截touchesMoved:withEvent方法就像在当前代码中一样，并更新UIScrollView对象的可见区域。

Answer 2

我希望您不必检测您的需求的触摸使用UIScrollView作为UITextView的父视图。

    scroll=[[UIScrollView alloc]initWithFrame:CGRectMake(0,40, 320,200)];
    [scroll setContentSize:CGSizeMake(640, 200)];

或者，如果您想为视图设置动画，则可以使用仿射变换。


        [UIView beginAnimations:nil context:NULL];
        [UIView setAnimationDuration:1];
        someview.transform=CGAffineTransformMakeTranslation(-100, 0);
        [UIView commitAnimations];

不使用分页将textview水平滑动

2 个答案: