Decrease Space between UICollectionViewCells

问题:

Objective

I am trying to decrease the space between my UICollectionViewCells

What I tried

I tried subclassing UICollectionViewFlowLayout and overriding this method:

- (NSArray *) layoutAttributesForElementsInRect:(CGRect)rect {
    NSArray *answer = [[super layoutAttributesForElementsInRect:rect] mutableCopy];

    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;
}

and then in my UICollectionViewController viewDidLoad:

SublassedcollectionViewLayout *space = [[SublassedcollectionViewLayout alloc]init];
self.collectionView.collectionViewLayout = space;

Problem

That just makes my UICollectionViewCells smaller.

EDIT: I want to decrease the spacing from left to right instead of top to bottom.

Any help will be appreciated!

回答1:

VERTICAL SPACING

Select your collection view in the storyboard.

Then change...

Changing

To

I also found this answer, might also be useful

HORIZONTAL SPACING

For Left to Right Spacing, from my testing you can only change the distance from the screen edge to first cell, called Section Insets. You can also change the min spacing between the cells, from 0 to x using Min Spacing For Cells

Setting the collection view to these settings produces

Changing the Min Cell Spacing to:

From this, it appears that you can only adjust the insets on the left and right (padding) from the first and last cell and then the minimum distance between cell. The rest is automatically calculated.

So to get the desired effect you need to alter these values, Min Spacing For Cells and the Section Insets