我试图在我的iOS应用中实现条形图。我正在使用JBChartView。一切都很好,但是除非我使用touchEvent按下它们,否则没有颜色。
有没有人有使用此特定插件的经验来帮助我让它正常工作?
谢谢
- (void)viewDidLoad
{
_barChartView = [[JBBarChartView alloc] init];
_barChartView.delegate = self;
_barChartView.dataSource = self;
_tableView.backgroundColor =[UIColor clearColor];
_barChartView.frame = CGRectMake(0,0,200,200);
_barChartView.backgroundColor = [UIColor clearColor];
[_barChartView reloadData];
[_barChart addSubview: _barChartView];
}
- (UIColor *)barSelectionColorForBarChartView:(JBBarChartView *)barChartView
{
return [UIColor greenColor]; // color of selection view
}
- (BOOL)slideNavigationControllerShouldDisplayLeftMenu
{
return YES;
}
- (UIColor *)barChartView:(JBBarChartView *)barChartView colorForBarViewAtIndex:(NSUInteger)index
{
return [UIColor greenColor];
}
- (NSUInteger)numberOfBarsInBarChartView:(JBBarChartView *)barChartView
{
return 4;
}
- (CGFloat)barChartView:(JBBarChartView *)barChartView heightForBarViewAtAtIndex:(NSUInteger)index
{
return 100.0;
}
答案 0 :(得分:2)
问题似乎与JBBarChartView
"规范化"价值。根据{{1}}的头文件:
JBBarChartView.h
因为这"正常化"当所有值都相同(/**
* Height for a bar at a given index (left to right). There is no ceiling on the the height;
* the chart will automatically normalize all values between the overal min and max heights.
*
* @param barChartView The bar chart object requesting this information.
* @param index The 0-based index of a given bar (left to right, x-axis).
*
* @return The y-axis height of the supplied bar index (x-axis)
*/
)时,它会将它们全部标准化为0,因此没有要显示的条形图。幸运的是,它是开源的,所以你只需要打开实现文件并进行一些修改:
100.0f
答案 1 :(得分:0)
解决问题的正确方法是在图表上提供最小值。
请查看@JBChartView的文档:
/**
* The minimum and maxmimum values of the chart.
* If no value(s) are supplied:
*
* minimumValue = chart's data source min value.
* maxmimumValue = chart's data source max value.
*
* If value(s) are supplied, they must be >= 0, otherwise an assertion will be thrown.
* The min/max values are clamped to the ceiling and floor of the actual min/max values of the chart's data source;
* for example, if a maximumValue of 20 is supplied & the chart's actual max is 100, then 100 will be used.
*
* For min/max modifications to take effect, reloadData must be called.
*/
@property (nonatomic, assign) CGFloat minimumValue;
@property (nonatomic, assign) CGFloat maximumValue;
如果您的所有数据都等于单个值(即100),则提供最小值0将确保所有条形均以相等(可见)高度(相对于0)绘制。
希望这有帮助。