[英]how can we set Button title labels exactly at center of both x-axis and y-axis
[英]How to show x-axis title?
我使用Xcode将应用程序开发到iOS8。我想创建一个温度图。 我在图形中添加了值,该图形向我显示了图形,但是x轴和x-title被隐藏了。
我该如何解决这个问题?
这是我的职能:
#import "CorePlot-CocoaTouch.h"
@property CPTScatterPlot *linePlot;
@property (nonatomic, strong) CPTGraphHostingView *hostView;
@property (nonatomic, strong) CPTGraph *graph;
在里面
-(void)initLinePlotTmp
{
//Initialize and display Graph (x and y axis lines)
self.graph = [[CPTXYGraph alloc] initWithFrame:self.graphView.bounds];
self.hostView = [[CPTGraphHostingView alloc] initWithFrame:self.graphView.bounds];
self.hostView.hostedGraph = self.graph;
[self.graphView addSubview:hostView];
//apply styling to Graph
[self.graph applyTheme:[CPTTheme themeNamed:kCPTPlainWhiteTheme]];
//set graph backgound area transparent
self.graph.backgroundColor = nil;
self.graph.fill = nil;
self.graph.plotAreaFrame.fill = nil;
self.graph.plotAreaFrame.plotArea.fill = nil;
//This removes top and right lines of graph
self.graph.plotAreaFrame.borderLineStyle = nil;
//This shows x and y axis labels from 0 to 1
self.graph.plotAreaFrame.masksToBorder = NO;
// set padding for graph from Left and Bottom
self.graph.paddingBottom = 10;
self.graph.paddingLeft = 50;
self.graph.paddingRight = 0;
self.graph.paddingTop = 10;
//Define x and y axis range
// x-axis from 0 to 100
// y-axis from 0 to 300
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *)self.graph.defaultPlotSpace;
plotSpace.allowsUserInteraction = YES;
plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromInt(plotXMinRange)
length:CPTDecimalFromInt(plotXMaxRange)];
plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromInt(plotYMinRange)
length:CPTDecimalFromInt(plotYMaxRange)];
CPTXYAxisSet *axisSet = (CPTXYAxisSet *)self.graph.axisSet;
NSNumberFormatter *axisLabelFormatter = [[NSNumberFormatter alloc]init];
[axisLabelFormatter setGeneratesDecimalNumbers:NO];
[axisLabelFormatter setNumberStyle:NSNumberFormatterDecimalStyle];
//Define x-axis properties
//x-axis intermediate interval 2
axisSet.xAxis.majorIntervalLength = CPTDecimalFromInt(plotXInterval);
axisSet.xAxis.minorTicksPerInterval = 1;
axisSet.xAxis.minorTickLength = 5;
axisSet.xAxis.majorTickLength = 7;
axisSet.xAxis.title = @"Time(Hours)";
axisSet.xAxis.titleOffset = 25;
axisSet.xAxis.labelFormatter = axisLabelFormatter;
//Define y-axis properties
//y-axis intermediate interval = 50;
axisSet.yAxis.majorIntervalLength = CPTDecimalFromInt(plotYInterval);
axisSet.yAxis.minorTicksPerInterval = 4;
axisSet.yAxis.minorTickLength = 5;
axisSet.yAxis.majorTickLength = 7;
axisSet.yAxis.title = @"Temperature";
axisSet.yAxis.titleOffset = 30;
axisSet.yAxis.labelFormatter = axisLabelFormatter;
//Define line plot and set line properties
self.linePlot = [[CPTScatterPlot alloc] init];
self.linePlot.dataSource = self;
[self.graph addPlot:self.linePlot toPlotSpace:plotSpace];
//set line plot style
CPTMutableLineStyle *lineStyle = [self.linePlot.dataLineStyle mutableCopy];
lineStyle.lineWidth = 2;
lineStyle.lineColor = [CPTColor blackColor];
self.linePlot.dataLineStyle = lineStyle;
CPTMutableLineStyle *symbolineStyle = [CPTMutableLineStyle lineStyle];
symbolineStyle.lineColor = [CPTColor blackColor];
CPTPlotSymbol *symbol = [CPTPlotSymbol ellipsePlotSymbol];
symbol.fill = [CPTFill fillWithColor:[CPTColor blackColor]];
symbol.lineStyle = symbolineStyle;
symbol.size = CGSizeMake(3.0f, 3.0f);
self.linePlot.plotSymbol = symbol;
//set graph grid lines
CPTMutableLineStyle *gridLineStyle = [[CPTMutableLineStyle alloc] init];
gridLineStyle.lineColor = [CPTColor grayColor];
gridLineStyle.lineWidth = 0.5;
axisSet.xAxis.majorGridLineStyle = gridLineStyle;
axisSet.yAxis.majorGridLineStyle = gridLineStyle;
}
向图形添加值
-(void)addHRValueToGraph:(int)data
{
[tmpValues addObject:[NSDecimalNumber numberWithInt:data]];
if ([tmpValues count] > plotXMaxRange) {
plotXMaxRange = plotXMaxRange + plotXMaxRange;
plotXInterval = plotXInterval + plotXInterval;
[self updatePlotSpace];
}
[self.graph reloadData];
}
viewDidLoad中
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
LogDebug(@"viewDidLoad");
tmpValues = [[NSMutableArray alloc]init];
tmpDBvalues= [[NSMutableArray alloc]init];
plotXMaxRange = 24;
plotXMinRange = 1;
plotYMaxRange = 5;
plotYMinRange = 35
plotYInterval = 1;
plotXInterval = 2;
}
X轴需要知道相对于Y轴的绘制位置。
尝试添加以下行:
axisSet.xAxis.orthogonalCoordinateDecimal = CPTDecimalFromUnsignedInteger(35);
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