I found a bug

[harde1]

• (NSArray *)autoDistributeViewsAlongAxis:(ALAxis)axis withFixedSize:(CGFloat)size insetSpacing:(BOOL)shouldSpaceInsets alignment:(NSLayoutFormatOptions)alignment

then

if (shouldSpaceInsets) {
multiplier = (i * 2.0f + 2.0f) / (numberOfViews + 1.0f);
constant = (multiplier - 1.0f) * size / 2.0f;
} else {
multiplier = (i * 2.0f) / (numberOfViews - 1.0f);
constant = (-multiplier + 1.0f) * size / 2.0f;
}

when shouldSpaceInsets=NO
if i==0,then multiplier=0