我正在使用目标C语言使用VBPIECHART。我正在分段控件的valueChange
上显示图表,例如:
- (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;
}
}
和 showPieChart
方法呈:
- (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];
}
}
由于VBPieChart
只是Uiview的自定义子类,因此应该有效。但是我没有任何成功。
我还尝试了[chart setHidden:YES];
以及[chart setAlpha:0.0];
,但仍然没有运气。
任何帮助将不胜感激。当用户切换回细分索引0时,我只想隐藏/删除图表。
谢谢。
vbpiechart *图表在.h文件上创建此对象然后
- (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
}
}
您需要如下创建变量。
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;
}