UIcollectionView详解自定义间距列距

-(void)initBaseDatas{
    self.view.backgroundColor=[UIColor whiteColor];
    CGRect rect=CGRectMake(0, 72, self.view.frame.size.width, self.view.frame.size.height-80);
    self.colleView=[[UICollectionView alloc]initWithFrame:rect collectionViewLayout:[[UICollectionViewFlowLayout alloc]init]];
    self.colleView.dataSource=self;
    self.colleView.delegate=self;
    self.colleView.backgroundColor=[UIColor whiteColor];
    [self.colleView registerNib:[UINib nibWithNibName:@"PictureMessageCell" bundle:nil] forCellWithReuseIdentifier:ID];
    [self.view addSubview:self.colleView];
}
#pragma mark ---de

-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
    return 10;
}
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    
    PictureMessageCell *cell=(PictureMessageCell *)[self.colleView dequeueReusableCellWithReuseIdentifier:ID forIndexPath:indexPath];
    cell.iconImg.image=[UIImage imageNamed:@"messligh"];
    return cell;
}
-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
    PictureMessageCell * cell = (PictureMessageCell *)[collectionView cellForItemAtIndexPath:indexPath];
//    cell.backgroundColor = [UIColor whiteColor];
}
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
    return CGSizeMake(self.view.frame.size.width/3.0-15, self.view.frame.size.width/3.0-15);
    
}
- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section
{
    return 10.0;
}
-(UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section
{
    return UIEdgeInsetsMake(8, 10, 8, 10);
}