Question

我有20个阵列图像。添加包含滚动视图的图像imageview.scroll垂直20图像。现在我的要求是给滚动的循环效果

例如20 1 2 3 4之后的示例..同样显示图像。

我试过那个但不适合我

- (void)scrollViewDidEndDecelerating:(UIScrollView *)sender
{
    NSLog(@"%f",scrollView.contentOffset.x);
    // The key is repositioning without animation
    if (scrollView.contentOffset.x == 0) {
        // user is scrolling to the left from image 1 to image 4
        // reposition offset to show image 4 that is on the right in the scroll view
    //  [scrollView scrollRectToVisible:CGRectMake(1280,0,320,416) animated:NO];

        [scrollView scrollRectToVisible:CGRectMake(6080, 0, 320, 416) animated:NO];

    }
    else if (scrollView.contentOffset.x == 6400) {
        // user is scrolling to the right from image 4 to image 1
        // reposition offset to show image 1 that is on the left in the scroll view


        [scrollView scrollRectToVisible:CGRectMake(0,0,320,416) animated:NO];

        //[scrollView scrollRectToVisible:CGRectMake(0, 0, 0, 0) animated:YES];
    }
}

提前帮助我，谢谢。

Answer 1

将Apple的示例代码用于循环ScrollView http://developer.apple.com/library/ios/#samplecode/StreetScroller/Introduction/Intro.html#//apple_ref/doc/uid/DTS40011102

否则

通过以下

替换您的代码

- (void)scrollViewDidEndDecelerating:(UIScrollView *)sender
{
    NSLog(@"%f",self.scrollView.contentOffset.x);
    // The key is repositioning without animation
    if (self.scrollView.contentOffset.x == 0) {
        // user is scrolling to the left from image 1 to image 4
        // reposition offset to show image 4 that is on the right in the scroll view
        //  [scrollView scrollRectToVisible:CGRectMake(1280,0,320,416) animated:NO];

//        [self.scrollView scrollRectToVisible:CGRectMake(6080, 0, 320, 416) animated:NO];
         [self.scrollView setContentOffset:CGPointMake(6080, 0) animated:YES];
    }
    else if (self.scrollView.contentOffset.x == 6080) {
        // user is scrolling to the right from image 4 to image 1
        // reposition offset to show image 1 that is on the left in the scroll view

        [self.scrollView setContentOffset:CGPointMake(0, 0) animated:YES];
//        [self.scrollView scrollRectToVisible:CGRectMake(0,0,320,416) animated:NO];

        //[scrollView scrollRectToVisible:CGRectMake(0, 0, 0, 0) animated:YES];
    }
}

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给滚动视图赋予循环效果

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