ios - Instagram 等图片列表
<p><p>我想制作一个可滚动的图像列表,例如带有 4 列的 instagram。我创建了一个带有 ImageView 的 Collection View<a href="http://prntscr.com/d15rnx" rel="noreferrer noopener nofollow">http://prntscr.com/d15rnx</a> .但我得到了这个结果 - <a href="http://prntscr.com/d15tsq" rel="noreferrer noopener nofollow">http://prntscr.com/d15tsq</a>
代码 - </p>
<pre><code>// MARK: - UICollectionViewDataSource protocol
// tell the collection view how many cells to make
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.items.count
}
// make a cell for each cell index path
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
// get a reference to our storyboard cell
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath as IndexPath) as! MyCollectionViewCell
// Use the outlet in our custom class to get a reference to the UILabel in the cell
cell.imageView.image = UIImage(named: "main/p\(self.items.code)/main/main.jpg")
print("main_card_images/p\(self.items.code)/main/main")
return cell
}
// MARK: - UICollectionViewDelegate protocol
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
// handle tap events
print("You selected cell #\(indexPath.item)!")
print(self.items)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
let yourNextViewController = (segue.destination as! ViewControllerCard)
let indexPath = collectionView.indexPath(for: sender as! UICollectionViewCell)
yourNextViewController.mainCardImage = self.items[(indexPath?.item)!]
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>确保您已将单元间距设置为 0,然后您所要做的就是实现:</p>
<pre><code>func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
return(collectionView.bounds.size.width/4,collectionView.bounds.size.height/4)
}
</code></pre>
<p>这会将所有单元格的大小调整为等于 <code>UICollectionView</code> 宽度的 1/4,从而在每行中创建 4 个单元格(高度值的 1/4 只是因为我喜欢这些类型的对称性用户界面)。如果单元格的数量似乎比这少,那是因为项目间的间距没有设置为 0。如果你想要项目间的间距,只需从上面函数中返回的宽度值中减去该值</p>
<p><strong>或者</strong></p>
<p>您可以实现自己的自定义流布局,但上述解决方案要简单得多。 </p></p>
<p style="font-size: 20px;">关于ios - Instagram 等图片列表,我们在Stack Overflow上找到一个类似的问题:
<a href="https://stackoverflow.com/questions/40342212/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/40342212/
</a>
</p>
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