Tuesday, 14 October 2014

Keep iOS 6 UITableView Group styles in iOS 7 Apps

There are lots of changes in UITableView in iOS 7. Earlier we have used group table view to have a rounded corner and other nice looking tables in iOS 6.
I was trying to keep my iOS 6 tables intact in my iOS 7 apps.



- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
   
    // This will remove extra separators from tableview
    self.tableViewSettings.tableFooterView = [[UIView alloc] initWithFrame:CGRectZero];

    [self.tableViewSettings setSeparatorInset:UIEdgeInsetsZero];
   

}



// Now See UITableView Delegate Methods ::


#pragma mark- UITableDataSource Delegate ::

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return 5;
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *cellIdentifier = @"CellIdentifier";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    
    if(cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault  reuseIdentifier:cellIdentifier];
        
        [cell setBackgroundColor:[UIColor clearColor]];
        
        cell.selectionStyle = UITableViewCellSelectionStyleNone;
    }
    
    [cell.textLabel setFont:[UIFont boldSystemFontOfSize:20.0f]];
    
  
    
    [cell.textLabel setText:@"test"];
    
    
    return cell;
    
}


- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    
    
}



- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 60;
    
}





- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section
{
    // This will create a "invisible" footer
    return 0.01f;
}

- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
    return [UIView new];
    
}


- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if ([cell respondsToSelector:@selector(tintColor)])
    {
        cell.backgroundColor = UIColor.clearColor;
        
        CAShapeLayer *layer = [self tableView:tableView layerForCell:cell forRowAtIndexPath:indexPath withColor:[UIColor whiteColor]];
        
        CGRect bounds = CGRectInset(cell.bounds, 5, 0);
        UIView *testView = [[UIView alloc] initWithFrame:bounds];
        [testView.layer insertSublayer:layer atIndex:0];
        testView.backgroundColor = UIColor.clearColor;
        cell.backgroundView = testView;
        cell.selectedBackgroundView = [self backgroundCellView:cell indexPath:indexPath tableView:tableView];
    }
}





- (UIView *)backgroundCellView:(UITableViewCell *)cell indexPath:(NSIndexPath *)indexPath tableView:(UITableView *)tableView
{
    CAShapeLayer *layer = [self tableView:tableView layerForCell:cell forRowAtIndexPath:indexPath withColor:[UIColor whiteColor]];
    CGRect bounds = CGRectInset(cell.bounds, 5, 0);
    UIView *testView = [[UIView alloc] initWithFrame:bounds];
    [testView.layer insertSublayer:layer atIndex:0];
    return testView;
}





- (CAShapeLayer *)tableView:(UITableView *)tableView layerForCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath withColor:(UIColor *)color
{
    CGFloat cornerRadius = 5.f;
    CAShapeLayer *layer = [[CAShapeLayer alloc] init];
    CGMutablePathRef pathRef = CGPathCreateMutable();
    CGRect bounds = CGRectInset(cell.bounds, 5, 0);
    BOOL addLine = NO;
    
    if (indexPath.row == 0 && indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1)
    {
        CGPathAddRoundedRect(pathRef, nil, bounds, cornerRadius, cornerRadius);
    }
    else if (indexPath.row == 0)
    {
        CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds));
        CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds), CGRectGetMidX(bounds), CGRectGetMinY(bounds), cornerRadius);
        CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius);
        CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds));
        addLine = YES;
    }
    else if (indexPath.row == [tableView numberOfRowsInSection:indexPath.section]-1)
    {
        CGPathMoveToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMinY(bounds));
        CGPathAddArcToPoint(pathRef, nil, CGRectGetMinX(bounds), CGRectGetMaxY(bounds), CGRectGetMidX(bounds), CGRectGetMaxY(bounds), cornerRadius);
        CGPathAddArcToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMaxY(bounds), CGRectGetMaxX(bounds), CGRectGetMidY(bounds), cornerRadius);
        CGPathAddLineToPoint(pathRef, nil, CGRectGetMaxX(bounds), CGRectGetMinY(bounds));
    }
    else
    {
        CGPathAddRect(pathRef, nil, bounds);
        addLine = YES;
    }
    
    
    
    layer.path = pathRef;
    
    CFRelease(pathRef);
    
    layer.fillColor = color.CGColor;
    
    if (addLine == YES)
    {
        CALayer *lineLayer = [[CALayer alloc] init];
        CGFloat lineHeight = (1.f / [UIScreen mainScreen].scale);
        lineLayer.frame = CGRectMake(CGRectGetMinX(bounds), bounds.size.height-lineHeight, bounds.size.width, lineHeight);

        lineLayer.backgroundColor = tableView.separatorColor.CGColor;

        [layer addSublayer:lineLayer];
    }
    
    
    return layer;

}