橫向等間隙的排列一組view

1.橫向等間隙的排列一組view

//橫向等間隙的排列一組view
- (void) distributeSpacingHorizontallyWith:(NSArray*)views
{
    NSMutableArray *spaces = [NSMutableArray arrayWithCapacity:views.count+1];
    
    for ( int i = 0 ; i < views.count+1 ; ++i )
    {
        UIView *v = [UIView new];
        [spaces addObject:v];
        [self addSubview:v];
        
        [v mas_makeConstraints:^(MASConstraintMaker *make) {
            make.width.equalTo(v.mas_height);
        }];
    }
    
    UIView *v0 = spaces[0];
    
    [v0 mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.mas_left);
        make.centerY.equalTo(((UIView*)views[0]).mas_centerY);
    }];
    
    UIView *lastSpace = v0;
    for ( int i = 0 ; i < views.count; ++i )
    {
        UIView *obj = views[i];
        UIView *space = spaces[i+1];
        
        [obj mas_makeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(lastSpace.mas_right);
        }];
        
        [space mas_makeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(obj.mas_right);
            make.centerY.equalTo(obj.mas_centerY);
            if (i != views.count-1 ) {
                make.width.equalTo(@(marginL*2));//間隙
            } else {
                make.width.equalTo(v0);
            }
        }];
        lastSpace = space;
    }
    //最後一個填充塊
    [lastSpace mas_makeConstraints:^(MASConstraintMaker *make) {
        make.right.equalTo(self.mas_right).with.offset(20);
    }];
}