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[无需解决]UICollectionViewFlowLayout中设置每个单元水平距离的最大值

iOS crifan 1389浏览 0评论

已经通过:

        //collection view layout

        let flowLayout:UICollectionViewFlowLayout = UICollectionViewFlowLayout()

//        flowLayout.scrollDirection = .Horizontal

        flowLayout.scrollDirection = .Vertical

        flowLayout.sectionInset = OptionCellInsets

        flowLayout.minimumInteritemSpacing = 10

        flowLayout.minimumLineSpacing = 5

设置了:minimumInteritemSpacing

两个单元的最小间距

但是对于显示效果中的:

距离太大

想要去设置,两个cell 的最大水平距离

UICollectionViewFlowLayout max item spacing

ios – UICollectionView Max Cell Spacing? – Stack Overflow

ios – Cell spacing in UICollectionView – Stack Overflow

ios – UICollectionView distance between cells? – Stack Overflow

其实想要设置最大的spacing的话,可以参考:

ios – Cell spacing in UICollectionView – Stack Overflow

去重写layoutAttributesForElementsInRect

– (NSArray *) layoutAttributesForElementsInRect:(CGRect)rect {

    NSArray *answer = [super layoutAttributesForElementsInRect:rect];

    for(int i = 1; i < [answer count]; ++i) {

        UICollectionViewLayoutAttributes *currentLayoutAttributes = answer[i];

        UICollectionViewLayoutAttributes *prevLayoutAttributes = answer[i – 1];

        NSInteger maximumSpacing = 4;

        NSInteger origin = CGRectGetMaxX(prevLayoutAttributes.frame);

        if(origin + maximumSpacing + currentLayoutAttributes.frame.size.width < self.collectionViewContentSize.width) {

            CGRect frame = currentLayoutAttributes.frame;

            frame.origin.x = origin + maximumSpacing;

            currentLayoutAttributes.frame = frame;

        }

    }

    return answer;

}

但是此处,暂时不去弄了。

因为可以通过:

减少frame的宽度

   func getCollectionFrameSize(itemIndex:Int) -> CGSize {

        var frameSize = CGSizeMake(FilterCustomerTableViewWidth, 0)

        switch itemIndex {

        case 0:

            //frameSize.height = 120

            frameSize.height = 130

        case 1:

            frameSize.height = 50

        case 2:

            frameSize.height = 50

        case 3:

            frameSize.width = MainScreenWidth * 0.7

            //frameSize.height = 80

            frameSize.height = 90

        default:

            break

        }

        return frameSize

    }

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

        let curCustomerOption = self.customerOptionList[indexPath.row]

        let curItemSize = getCollectionItemSize(indexPath.row)

        let frameSize = getCollectionFrameSize(indexPath.row)

        let cell = OptionTableViewCell(title: curCustomerOption.type, optionList: curCustomerOption.optionList, reuseIdentifier: OptionTableViewCellId, itemSize: curItemSize, frameSize: frameSize) as OptionTableViewCell

        return cell

    }

    convenience init(title:String, optionList:[String], reuseIdentifier:String?, itemSize:CGSize = CGSizeZero, frameSize:CGSize = CGSizeZero){

        self.init(style: UITableViewCellStyle.Subtitle, reuseIdentifier:reuseIdentifier)

        self.title = title

        self.optionList = optionList

        self.itemSize = itemSize

        if frameSize != CGSizeZero {

            self.frameSize = frameSize

            gLog.verbose("optionListCollectionView.frame=\(optionListCollectionView.frame)")

            //(0.0, 30.0, 0.0, 0.0)

            self.optionListCollectionView.frame.size = self.frameSize

            gLog.verbose("optionListCollectionView.frame=\(optionListCollectionView.frame)")

            //(0.0, 30.0, 256.0, 120.0)

        }

  }

使得可以显示起来,很好看,对齐了:

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