我想在其中显示水平条形图...正条形图将从左到右设置动画，负条形图将从右到左设置动画。
我还附上了我的两种不同类型的数组...1 个用于正数，1 个用于负数
当我运行这段代码时...负条值看起来像镜面效果...对于正值，它在每个条中使用两种颜色...
请帮我解决一下.. 如果您在代码中发现任何错误...请告诉我
我也附上两张图片.. 1 张为负片，1 张为正片
是的，你可以看到值是如何显示在负栏中的……我也需要解决它……
sampleArray:
<__NSArrayM 0xbae0940>(
{
x = 0;
y = "97.71425628662109";
},
{
x = 0;
y = "-70.55500793457031";
}
)
sampleArray:
<__NSArrayM 0x12a295a0>(
{
x = 0;
y = "97.71425628662109";
},
{
x = 0;
y = "450.6826171875";
}
)
这是我的完整代码...
CPTGraphHostingView *hostingView = [[CPTGraphHostingView alloc] initWithFrame:CGRectMake(200, 100, 300, 300)];
hostingView.hostedGraph = self.barChart;
[self addSubview:hostingView];
plotSpace = (CPTXYPlotSpace *) self.barChart.defaultPlotSpace;
plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromDouble(-200.0f) length:CPTDecimalFromDouble(650.0f)];
plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromDouble(00.0f) length:CPTDecimalFromDouble(400.0f)];
- (void) animateNow
{
CPTBarPlot *barPlot = [CPTBarPlot tubularBarPlotWithColor:[CPTColor orangeColor] horizontalBars:YES];
// define the plot range - between LTM and NEW, diffrence is 200
barPlot.plotRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromDouble(0.0) length:CPTDecimalFromDouble(200)];//xAxisLength
// LTM will display at 100th point and NEW will display at 300th coz of 200 range
barPlot.barOffset = CPTDecimalFromFloat(100.00f);
barPlot.baseValue = CPTDecimalFromString(@"0");
barPlot.borderColor = [[UIColor clearColor]CGColor];
barPlot.lineStyle = nil;
// Width of the each bar
barPlot.barWidth = CPTDecimalFromFloat(30.0f);
barPlot.cornerRadius = 1.0f;
barPlot.dataSource = self;
// transform.scale.x for horizontal bar growth
CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:@"transform.scale.x"];
if([[[self.sampleArray objectAtIndex:0]valueForKey:Y_VAL]floatValue] < 0)
{
anim.toValue = [NSNumber numberWithFloat:-1.0];
anim.fromValue = [NSNumber numberWithFloat:0.0f];
}
else
{
anim.toValue = [NSNumber numberWithFloat:1.0];
anim.fromValue = [NSNumber numberWithFloat:0.0f];
}
[anim setDuration:2.0f];
anim.toValue = [NSNumber numberWithFloat:1.0];
anim.fromValue = [NSNumber numberWithFloat:0.0f];
anim.removedOnCompletion = NO;
anim.delegate = self;
anim.fillMode = kCAFillModeForwards;
barPlot.anchorPoint = CGPointMake(0.0, 0.0);
[barPlot addAnimation:anim forKey:@"grow"];
[self.barChart addPlot:barPlot toPlotSpace:plotSpace ];
}
-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot
{
/* if([plot.identifier isEqual:@"LTM"])
return [self.sampleArray count]; */
// return [self.sampleArray count];
return [self.sampleArray count];
}
-(CPTLayer *)dataLabelForPlot:(CPTPlot *)plot recordIndex:(NSUInteger)index
{
NSDictionary *bar;
CPTTextLayer *label;
if([plot.identifier isEqual:@"LTM"])
{
bar = [self.sampleArray objectAtIndex:0];
label = [[CPTTextLayer alloc] initWithText:[NSString stringWithFormat:@"%.02f", [[bar valueForKey:Y_VAL]floatValue]]];
}
else if([plot.identifier isEqual:@"NEW"])
{
bar = [self.sampleArray objectAtIndex:1];
label = [[CPTTextLayer alloc] initWithText:[NSString stringWithFormat:@"%.02f", [[bar valueForKey:Y_VAL]floatValue]]]; }
else
{
return nil;
}
float dataLabelOffset;
if([[self.sampleArray objectAtIndex:index]valueForKey:Y_VAL]> 0)
{
dataLabelOffset = -5.0f;
}
else
{
dataLabelOffset = 10.0f;
}
plot.labelOffset = dataLabelOffset;
NSLog(@"Offset = %f",plot.labelOffset);
// label.textStyle = textStyle;
return label;
}
-(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index
{
NSDictionary *sample = [self.sampleArray objectAtIndex:index];
if (fieldEnum == CPTScatterPlotFieldX)
{
return [sample valueForKey:X_VAL];
}
else
{
return [sample valueForKey:Y_VAL];
}
}
-(CPTFill *)barFillForBarPlot:(CPTBarPlot *)barPlot recordIndex:(NSUInteger)index
{
CPTColor *color = nil;
// Index = 0, for LTM and Index = 1 for NEW.
NSLog(@"%@",barPlot.identifier);
switch ( index )
{
case 0:
color = [CPTColor colorWithComponentRed:147.0/255.0 green:149.0/255.0 blue:152.0/255.0 alpha:1.0];
break;
case 1:
color = [CPTColor colorWithComponentRed:255.0/255.0 green:160.0/255.0 blue:47.0/255.0 alpha:1.0];
break;
default:
break;
}
CPTGradient *fillGradient = [CPTGradient gradientWithBeginningColor:color endingColor:color];
return [CPTFill fillWithGradient:fillGradient];
}
最佳答案
设置绘图时，不要使用plotRange 或barOffset。如果您使用纯色填充而不是渐变(您的渐变具有相同的开始和结束颜色)，您将获得更好的绘图性能。
- (void) animateNow
{
CPTBarPlot *barPlot = [CPTBarPlot tubularBarPlotWithColor:[CPTColor orangeColor] horizontalBars:YES];
barPlot.lineStyle = nil;
barPlot.barWidth = CPTDecimalFromFloat(30.0f);
barPlot.cornerRadius = 1.0f;
barPlot.dataSource = self;
CPTColor *color = [CPTColor colorWithComponentRed:147.0/255.0 green:149.0/255.0 blue:152.0/255.0 alpha:1.0];
barPlot.fill = [CPTFill fillWithColor:color];
CPTBarPlot *barPlot1 = [CPTBarPlot tubularBarPlotWithColor:[CPTColor blueColor] horizontalBars:YES];
barPlot1.barWidth = CPTDecimalFromFloat(30.0f);
barPlot1.lineStyle = nil;
barPlot1.cornerRadius = 1.0f;
barPlot1.dataSource = self;
CPTColor *color1 = [CPTColor colorWithComponentRed:255.0/255.0 green:160.0/255.0 blue:47.0/255.0 alpha:1.0];
barPlot1.fill = [CPTFill fillWithColor:color1];
barPlot.identifier = @"LTM";
[self.barChart addPlot:barPlot toPlotSpace:plotSpace ];
barPlot1.identifier = @"NEW";
[self.barChart addPlot:barPlot1 toPlotSpace:plotSpace ];
}
以这种方式配置绘图，绘图空间设置更简单:
plotSpace = (CPTXYPlotSpace *) self.barChart.defaultPlotSpace;
plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromDouble(0.0) length:CPTDecimalFromDouble(450.0)];
plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromDouble(-0.5) length:CPTDecimalFromDouble(1.0)];
我假设您想要使用两个图构建一个水平条以获得不同的颜色。如果是这样，我将如何编写数据源方法:
// datasource
-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot
{
return 1;
}
-(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index
{
NSDictionary *sample = nil;
if([plot.identifier isEqual:@"LTM"])
{
sample = self.sampleArray[0];
}
else if([plot.identifier isEqual:@"NEW"])
{
sample = self.sampleArray[1];
}
switch (fieldEnum) {
case CPTBarPlotFieldBarLocation:
return @(index);
break;
case CPTBarPlotFieldBarTip:
return sample[Y_VAL];
break;
}
return nil;
}
请注意，绘图字段标识符是条形图位置和提示，而不是散点图枚举值。对于水平条形图，位置值沿 y 轴，尖端和底部位于 x 轴上。
关于ios - 在单个条形图中同时显示负水平和正水平，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21045038/