VBPieChart - removeFromSuperView not working (hide chart) - ios

Question

I'm using VBPieChart, in Objective C language. I'm showing the chart on valueChange of a segmented control, like :
- (IBAction)segmentControlAction:(UISegmentedControl *)sender
{
switch ([sender selectedSegmentIndex])
{
case 0:
[self showPieChart:NO];
_tableViewForCount.hidden = NO;
[_tableViewForCount reloadSections:[NSIndexSet indexSetWithIndex:0] withRowAnimation:UITableViewRowAnimationRight];
break;
case 1:
_tableViewForCount.hidden = YES;
[self showPieChart:YES];
break;
default:
NSLog(#"None");
break;
}
}
and the showPieChart method goes like :
- (void) showPieChart:(Boolean)visible
{
VBPieChart *chart = [[VBPieChart alloc] initWithFrame:CGRectMake(0, 0, 250, 250)];
chart.center = self.view.center;
// Setup some options:
[chart setHoleRadiusPrecent:0.3]; /* hole inside of chart */
// Prepare your data
NSMutableArray *chartValues = [[NSMutableArray alloc]initWithObjects: #{#"name":#"Apples", #"value":#50, #"color":[UIColor redColor]},
#{#"name":#"Pears", #"value":#20, #"color":[UIColor blueColor]},
#{#"name":#"Oranges", #"value":#40, #"color":[UIColor orangeColor]},
#{#"name":#"Bananas", #"value":#70, #"color":[UIColor purpleColor]}, nil
];
if (visible)
{
chart.center = self.view.center;
// Present pie chart with animation
[chart setChartValues:chartValues animation:YES duration:0.4 options:VBPieChartAnimationFan];
[self.view addSubview:chart];
}
else
{
// remove chart
[chart removeFromSuperView];
}
}
Since VBPieChart is just a custom subclass of UIView, this should work. But i'm not getting any success.
I've also tried [chart setHidden:YES]; as well as [chart setAlpha:0.0]; , but still no luck.
Any help would is appreciated. I just want to hide/remove the chart when user switched back to segment index 0.
Thanks.

Answer 1

VBPieChart *chart create this object on the .h file then
- (void) showPieChart:(Boolean)visible
{
if(chart == nil)
{
chart = [[VBPieChart alloc] initWithFrame:CGRectMake(0, 0, 250, 250)];
[self.view addSubview:chart];
}
chart.center = self.view.center;
// Setup some options:
[chart setHoleRadiusPrecent:0.3]; /* hole inside of chart */
// Prepare your data
NSMutableArray *chartValues = [[NSMutableArray alloc]initWithObjects: #{#"name":#"Apples", #"value":#50, #"color":[UIColor redColor]},
#{#"name":#"Pears", #"value":#20, #"color":[UIColor blueColor]},
#{#"name":#"Oranges", #"value":#40, #"color":[UIColor orangeColor]},
#{#"name":#"Bananas", #"value":#70, #"color":[UIColor purpleColor]}, nil
];
if (visible)
{
chart.center = self.view.center;
// Present pie chart with animation
[chart setChartValues:chartValues animation:YES duration:0.4 options:VBPieChartAnimationFan];
chart.alpa = 1.0
}
else
{
// remove chart
chart.alpa = 0.0
}
}

Answer 2

You need to create variable as below.
static VBPieChart *chart = nil
if(!chart)
chart = [[VBPieChart alloc] initWithFrame:CGRectMake(0, 0, 250, 250)];
}
if (visible)
{
chart.hidden = NO;
}
else
{
// hide chart
chart.hidden = YES;
}