問題描述

我有一個(gè) scrollview，其中有 5 個(gè)寬度為 88 的圖像視圖.

I have a scrollview with 5 image views of width 88.

我希望 scrollview 滾動(dòng)到每個(gè)圖像視圖 (非分頁)

I want the scrollview to scroll to each image view (Not Paging)

和

我想在 iPhone 中制作一個(gè)無限滾動(dòng)視圖，這意味著當(dāng)它滾動(dòng)到最后一個(gè)項(xiàng)目時(shí)，它會(huì)在它旁邊顯示第一個(gè)項(xiàng)目..

I want to make an infinite scrollview in iPhone which means the when it scroll to last item it will display a first item next to it..

我一直在嘗試按偏移量，但是當(dāng)按偏移量移動(dòng)它時(shí)它會(huì)停止，而且 我使用了蘋果街道滾動(dòng)條，它不允許我將每個(gè)元素停止在中心(就像選擇器視圖)..>

I have been trying by offset but it stops when move it by offset and also I have used apple street scroller which does not allow me to stop each element in center(just like Picker view)..

推薦答案

首先，我推薦使用 UITableView，這樣可以保持較低的內(nèi)存使用率.我在一個(gè)項(xiàng)目中成功使用的方法如下:

First of all, I recommend to use a UITableView so you can maintain the memory usage low. An approach that I had used successfully in a project is the following:

1.列表項(xiàng)

復(fù)制單元格的內(nèi)容，我的意思是如果你有 5 個(gè)這樣的項(xiàng)目:

Duplicate the content of your cells, I mean if you have 5 items in this way:

|1 |2 |3 |4 |5 |

| 1 | 2 | 3 | 4 | 5 |

您應(yīng)該在表格末尾添加相同的內(nèi)容(在具有可重用引擎的表格視圖中，這不是什么大問題)，以便看起來像這樣:

You should add the same (In a table view with reusable engine that's not a big deal) at the end of the table in order to look like this:

|1 |2 |3 |4 |5 |1 |2 |3 |4 |5 |

| 1 | 2 | 3 | 4 | 5 | 1 | 2 | 3 | 4 | 5 |

2.修改 scrollViewDidScroll 如下:

2. modify the scrollViewDidScroll with the following:

-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    if (scrollView == _yourScrollView) {
        CGFloat currentOffsetX = scrollView.contentOffset.x;
        CGFloat currentOffSetY = scrollView.contentOffset.y;
        CGFloat contentHeight = scrollView.contentSize.height;

        if (currentOffSetY < (contentHeight / 6.0f)) {
            scrollView.contentOffset = CGPointMake(currentOffsetX,(currentOffSetY + (contentHeight/2)));
        }
        if (currentOffSetY > ((contentHeight * 4)/ 6.0f)) {
            scrollView.contentOffset = CGPointMake(currentOffsetX,(currentOffSetY - (contentHeight/2)));
        }
    }
}

如果您幾乎到達(dá)滾動(dòng)的最后，上面的代碼將滾動(dòng)位置移動(dòng)到頂部；或者，如果您幾乎在頂部，則將您移至底部...

The code above move the scroll position at top if you almost reach the final of the scrolling; Or if you are almost on the top, moves you to the bottom...

3.就是這樣.

這篇關(guān)于如何在 iPhone 中制作無限滾動(dòng)視圖?的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，也希望大家多多支持html5模板網(wǎng)！