相关疑难解决方法(0)

I am currently using UICollectionView for the user interface grid, and it works fine. However, I'd like to be enable horizontal scrolling. The grid supports 8 items per page and when the total number of items are, say 4, this is how the items should be arranged with horizontal scroll direction enabled:

0 0 x x
0 0 x x

Here 0 -> Collection Item and x -> Empty Cells

有没有办法使它们居中对齐,如:

x 0 0 x
x 0 0 x

这样内容看起来更干净？ …

我有一个流式布局的UICollectionView,每个单元格都是一个正方形.如何确定每行上每个单元格之间的间距？我似乎找不到适合的设置.我看到nib文件中有一个min间距属性用于集合视图,但我将其设置为0并且单元格甚至没有粘贴.

还有其他想法吗？

我有UICollectionView随机细胞.有没有什么方法可以让我居中行？

这是默认情况下的外观:

[ x x x x x x ]  
[ x x x x x x ]  
[ x x         ]  

这是所需的布局:

[ x x x x x ]  
[ x x x x x ]  
[    x x    ]  

这是导致警告的代码:

private override func layoutAttributesForItemAtIndexPath(indexPath: NSIndexPath) -> UICollectionViewLayoutAttributes? {
    let attributes = super.layoutAttributesForItemAtIndexPath(indexPath)
    let distance = CGRectGetMidX(attributes!.frame) - self.midX;
    var transform = CATransform3DIdentity;
    transform = CATransform3DTranslate(transform, -distance, 0, -self.width);
    attributes!.transform3D = CATransform3DIdentity;
    return attributes
}

控制台还打印:

这可能是因为流布局"xyz"正在修改UICollectionViewFlowLayout返回的属性而不复制它们.

我该如何修复此警告？

我有一个位于 tableView 单元格内的 collectionView。collectionView 有多个部分。如果一节只有一个单元格，则该单元格会居中显示。如何将单个单元格与左侧对齐？

collectionView 具有以下内容flowLayout：

let flowLayout = UICollectionViewFlowLayout()
flowLayout.scrollDirection = .vertical
flowLayout.sectionInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)
flowLayout.minimumInteritemSpacing = 0
flowLayout.minimumLineSpacing = 0
flowLayout.estimatedItemSize = UICollectionViewFlowLayout.automaticSize
collectionView.setCollectionViewLayout(flowLayout, animated: true)

我想实现一个TokenView(芯片视图)样式视图.为此我在UITableViewCell中使用了一个集合视图,CollectionView有自定义cell.Inside自定义单元格UILabel.现在,单元格的宽度取决于内容UILabel.

下面是自定义UITableViewCell Cell的代码

import UIKit

class LanguageTableViewCell: UITableViewCell,UICollectionViewDataSource,UICollectionViewDelegate,UICollectionViewDelegateFlowLayout{

        var arr:[String] = ["English","Intermediate","English","Intermediate","English","Intermediate","English","Intermediate","English","Intermediate","English","Intermediate","English","Intermediate","English","Intermediate","English","Intermediate","English","Intermediate","English","Intermediate"]
    @IBOutlet weak var collectionView: UICollectionView!

    override func awakeFromNib() {
        super.awakeFromNib()
        collectionView.dataSource = self
        collectionView.delegate = self
        let layout = UICollectionViewFlowLayout()
        layout.minimumInteritemSpacing = 0
        layout.minimumLineSpacing = 0
        layout.scrollDirection = .vertical
        self.collectionView.collectionViewLayout = layout
        // Initialization code
    }


    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)

        // Configure the view for the selected state
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> …

如何使UlCollectionView的项目位于行内左侧

这种位置(上方屏幕截图)只能在线路上有唯一项目的情况下进行; 如果线上有多个元素(项目较小或屏幕较宽),则元素在行内左对齐并且位置看起来像所需:

UICollectionViewFlowLayout的设置如下:

UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];

flowLayout.minimumLineSpacing = 20.;
flowLayout.minimumInteritemSpacing = 5.;
flowLayout.sectionInset = UIEdgeInsetsMake(23., 15., 23., 15.);
flowLayout.scrollDirection = UICollectionViewScrollDirectionVertical;

self.collectionView.collectionViewLayout = flowLayout;

如何删除两个单元格之间的空间UiCollectionView？最小间距不起作用.

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
    if (collectionView.tag==101)
    {
        return CGSizeMake((_collView.frame.size.width),(_collView.frame.size.height));

    }
    else
    {
       return CGSizeMake((_collView2.frame.size.width/3)-20,300);
    }
}

但这不起作用.

我有一个像这样的UICollectionView:

这是三种不同的情况.浅灰色显示集合视图的边框,深灰色显示单元格.我已经将min spacing和section insets设置为0.但是我仍然得到这些不需要的插入内容,并且它似乎只有在有超过1个单元格时才会发生.

我像这样计算项目大小:

func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
    guard let item = place?.publicTransports?[indexPath.row] else {
        return CGSize.zero
    }

    var lines = ""
    for (i, line) in item.lines.enumerate() {
        lines.appendContentsOf(line)
        if i != item.lines.count - 1 {
            lines.appendContentsOf(", ")
        }
    }

    let linesString = lines as NSString
    return CGSize(width: linesString.sizeWithAttributes(nil).width + 35 + 20, height: collectionView.bounds.height/2)
}

有什么建议？