无法在核心图中的x轴和y轴标签上显示任何内容 [英] unable to show anything on x-axis and y-axis labels in core-plot
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问题描述
我正在应用程序中使用核心图，过去一周来，我试图在x轴和y轴上显示标签。但是还没有成功。我在这里将我的代码和屏幕截图一起发布。如果有人知道解决此问题的任何解决方法，请紧急通知我。
I'm using core plot in an application and from past one week I am trying to show labels on x-axis and y-axis. But haven't succeed yet. I'm posting my code here with screen shot. If someone knows any solution to fix the problem let me know urgently.
代码-
-(void)viewDidLoad {
[super viewDidLoad];
// Initialize all graph dependent data.
//self.dataForPlot = [[NSMutableArray alloc] initWithCapacity:0];
minYValues = [[NSMutableArray alloc] initWithCapacity:0];
maxYValues = [[NSMutableArray alloc] initWithCapacity:0];
[self createGraph];
[self customizeGraph];
}
- (void) createGraph{
// Create graph
graph = [[CPXYGraph alloc] initWithFrame:CGRectZero];
CPGraphHostingView *hostingView = (CPGraphHostingView *)self.view;
hostingView.collapsesLayers = YES;
hostingView.hostedGraph = graph;
hostingView.frame = self.view.frame;
//Create a blue plot area
CPScatterPlot *boundLinePlot = [[[CPScatterPlot alloc] init] autorelease];
boundLinePlot.dataLineStyle.miterLimit = 1.0f;
boundLinePlot.dataLineStyle.lineWidth = 1.0f;
UIColor* color = [UIColor orangeColor];
boundLinePlot.dataLineStyle.lineColor = [CPColor colorWithCGColor:[color CGColor]];
boundLinePlot.dataSource = self;
[graph addPlot:boundLinePlot];
}
- (void) customizeGraph{
if(graph)
{
graph.paddingLeft = 20.0;
graph.paddingTop = 20.0;
graph.paddingRight = 20.0;
graph.paddingBottom = 20.0;
CPScatterPlot *goalWeightPlot = [[[CPScatterPlot alloc] init] autorelease];
goalWeightPlot.identifier = kGoalWeightPlot;
//boundLinePlot.dataLineStyle.miterLimit = 5.0f;
goalWeightPlot.dataLineStyle.lineWidth = 1.0f;
goalWeightPlot.dataLineStyle.lineColor = [CPColor redColor];
goalWeightPlot.dataLineStyle.dashPattern = [NSArray arrayWithObjects:[NSNumber numberWithFloat:5.0],[NSNumber numberWithFloat:2.0],nil];
goalWeightPlot.dataSource = self;
[graph addPlot:goalWeightPlot];
// Create a blue plot area
CPScatterPlot *boundLinePlot = [[[CPScatterPlot alloc] init] autorelease];
boundLinePlot.identifier = kActualWeightPlot;
//boundLinePlot.dataLineStyle.miterLimit = 5.0f;
boundLinePlot.dataLineStyle.lineWidth = 1.0f;
boundLinePlot.dataLineStyle.lineColor = [CPColor orangeColor];
boundLinePlot.dataSource = self;
// Add plot symbols
CPLineStyle *symbolLineStyle = [CPLineStyle lineStyle];
symbolLineStyle.lineColor = [CPColor orangeColor];
CPPlotSymbol *plotSymbol = [CPPlotSymbol ellipsePlotSymbol];
plotSymbol.fill = [CPFill fillWithColor:[CPColor orangeColor]];
plotSymbol.lineStyle = symbolLineStyle;
plotSymbol.size = CGSizeMake(5.0, 5.0);
boundLinePlot.plotSymbol = plotSymbol;
[graph addPlot:boundLinePlot];
}
}
- (void) resetData{
dataForPlot = nil;
}
- (void) setGraphData:(NSArray*)graphData andRefrenceValue:(float)goalValue{
self.refereceValue = goalValue;
[self setGraphData:graphData];
}
- (void) setGraphData:(NSArray*)graphData{
//Check if we have any single weight entry in the array
if(graphData && [graphData count] > 0) {
[self prepareGraphData:graphData];
[self setRangeForGraph];
[graph reloadData];
}
}
- (NSArray *)sortedWeightEntriesByWeightDate:(NSArray *)unsortedArray {
NSMutableArray *tempArray = [NSMutableArray array];
for(int i=0;i<[unsortedArray count];i++) {
NSDateFormatter *df = [[NSDateFormatter alloc]init];
WeightEntry *entry = [unsortedArray objectAtIndex:i];
[df setDateFormat:@"yyyy-MM-dd"];
NSDate *date = [df dateFromString:entry.weightDate];
NSMutableDictionary *dict = [NSMutableDictionary dictionary];
if(date) {
[dict setObject:entry forKey:@"entity"];
[dict setObject:date forKey:@"date"];
[tempArray addObject:dict];
}
[df release];
}
NSInteger counter = [tempArray count];
NSDate *compareDate;
NSInteger index;
for(int i = 0 ; i < counter; i++) {
index = i;
compareDate = [[tempArray objectAtIndex:i] valueForKey:@"date"];
NSDate *compareDateSecond;
for(int j = i+1 ; j < counter; j++)
{
compareDateSecond=[[tempArray objectAtIndex:j] valueForKey:@"date"];
NSComparisonResult result = [compareDate compare:compareDateSecond];
if(result == NSOrderedDescending)
{
compareDate = compareDateSecond;
index=j;
}
}
if(i!=index)
[tempArray exchangeObjectAtIndex:i withObjectAtIndex:index];
}
NSMutableArray *sortedArray = [NSMutableArray arrayWithCapacity:0];
NSInteger counterIndex = [tempArray count];
for(int i = 0; i < counterIndex ; i++) {
[sortedArray addObject:[[tempArray objectAtIndex:i] valueForKey:@"entity"]];
}
return [NSArray arrayWithArray:sortedArray];
}
- (void) prepareGraphData:(NSArray*)data{
data = [self sortedWeightEntriesByWeightDate:data];
NSNumber* minYValue = nil;
NSNumber* maxYValue = nil;
NSMutableArray *contentArray = [NSMutableArray arrayWithCapacity:[data count]];
NSUInteger i;
for ( i = 0; i < [data count]; i++ ) {
WeightEntry* weightEntry = [data objectAtIndex:i];
if(i == 0){
maxYValue = [NSNumber numberWithFloat:weightEntry.weight];
minYValue = [NSNumber numberWithFloat:weightEntry.weight];
}
//id x = [NSNumber numberWithFloat:weightEntry.weight];
//id y = [NSNumber numberWithFloat:1.2*rand()/(float)RAND_MAX + 1.2];
id x = [NSNumber numberWithFloat:i];
id y = [NSNumber numberWithFloat:weightEntry.weight];
if([y floatValue] > [maxYValue floatValue])
maxYValue = y;
if([y floatValue] < [minYValue floatValue])
minYValue = y;
//[contentArray addObject:[NSMutableDictionary dictionaryWithObjectsAndKeys:x, @"x", y, @"y",[NSNumber numberWithFloat:goalWeight],@"goalY",nil]];
[contentArray addObject:[NSMutableDictionary dictionaryWithObjectsAndKeys:x, @"x", y, @"y",nil]];
}
self.dataForPlot = [NSArray arrayWithArray:contentArray];
[minYValues addObject:minYValue];
[maxYValues addObject:maxYValue];
lblHighValue.text = [NSString stringWithFormat:@"High = %0.2f", [maxYValue floatValue]];
lblLowValue.text = [NSString stringWithFormat:@"Low = %0.2f", [minYValue floatValue]];
lblRefrenceValue.text = [NSString stringWithFormat:@"Goal = %0.2f", self.refereceValue];
}
// Update the Plot Space Range to cover all graphs
- (void) setRangeForGraph{
NSNumber* minimumYValue;
NSNumber* maxmumYValue;
if([minYValues count] > 0 && [maxYValues count] > 0){
minimumYValue = [minYValues objectAtIndex:0];
maxmumYValue = [maxYValues objectAtIndex:0];
// Calculate minimum y value among all graphs.
for (int i = 0 ; i < [minYValues count] ; i++) {
if([[minYValues objectAtIndex:i] floatValue] < [minimumYValue floatValue])
minimumYValue = [minYValues objectAtIndex:i];
}
// Calculate maximum y value among all graphs.
for (int i = 0 ; i < [maxYValues count] ; i++) {
if([[maxYValues objectAtIndex:i] floatValue] > [maxmumYValue floatValue])
maxmumYValue = [maxYValues objectAtIndex:i];
}
NSDecimalNumber *high = [NSDecimalNumber decimalNumberWithDecimal:[maxmumYValue decimalValue]];
high = [high decimalNumberByAdding:[NSDecimalNumber decimalNumberWithString:@"30"]];
// Modify the y range for plot space to cover all values.
CPXYPlotSpace *plotSpace = (CPXYPlotSpace *)graph.defaultPlotSpace;
plotSpace.yRange = [CPPlotRange plotRangeWithLocation:CPDecimalFromFloat(0.0) length:[high decimalValue]];
plotSpace.xRange = [CPPlotRange plotRangeWithLocation:CPDecimalFromFloat(0.0) length:CPDecimalFromInt([self.dataForPlot count])];
CPPlotAreaFrame *area = (CPPlotAreaFrame *)graph.plotAreaFrame;
area.paddingLeft = 20;
area.paddingBottom = 10;
CPXYAxisSet *axisSet = (CPXYAxisSet*)graph.axisSet;
//axis.paddingLeft = 20.0;
axisSet.xAxis.paddingBottom = 50.0;
CPXYAxis *x = axisSet.xAxis;
x.majorIntervalLength = CPDecimalFromInteger([self.dataForPlot count]);
CPXYAxis *y = axisSet.yAxis;
y.majorIntervalLength = CPDecimalFromFloat([high floatValue]);
axisSet.xAxis.orthogonalCoordinateDecimal = CPDecimalFromFloat([minimumYValue floatValue]);
//axisSet.xAxis.labelOffset = 0.0;
CPLineStyle *lineStyle = [CPLineStyle lineStyle];
lineStyle.lineColor = [CPColor colorWithCGColor:((UIColor*)kProtienColor).CGColor];
lineStyle.lineWidth = 1.0f;
// style the graph with white text and lines
CPTextStyle *whiteText = [CPTextStyle textStyle];
whiteText.color = [CPColor redColor];
//CPXYAxis *x = axisSet.xAxis;
x.majorIntervalLength = CPDecimalFromString(@"1");
x.axisLineStyle = lineStyle;
//x.majorGridLineStyle=lineStyle;
//x.minorTicksPerInterval = 0;
//x.minorTickLineStyle = lineStyle;
x.title = @"Weight";
x.titleOffset = 3.0f;
x.titleLocation = CPDecimalFromFloat(3.0f);
x.titleTextStyle = whiteText;
x.labelTextStyle = whiteText;
//y.majorIntervalLength = CPDecimalFromString(@"150");
//y.minorTicksPerInterval = 10;
y.axisLineStyle = lineStyle;
y.title = @"Date";
y.titleTextStyle = whiteText;
y.titleOffset = 0;
y.minorTickLineStyle = lineStyle;
//y.titleLocation = CPDecimalFromFloat(graph.frame.origin.y+10);
//y.majorGridLineStyle=lineStyle;
//y.labelTextStyle=whiteText;
}
}
- (NSUInteger)numberOfRecordsForPlot:(CPPlot *)plot {
int nofOfRecords = 0;
@try {
nofOfRecords = [self.dataForPlot count];
}
@catch (NSException * e) {
NSLog(@"Exception while calculating graph index : %@", [e description]);
}
@finally {
//NSLog(@"Number of Records : %d For Graph Index : %d", nofOfRecords, graphIndex);
return nofOfRecords;
}
}
- (NSNumber *)numberForPlot:(CPPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index {
NSNumber *num = 0;
//int plotIndex = [(NSString *)plot.identifier intValue];
if([self.dataForPlot count] > 0){
if(![((NSString*)[plot identifier]) isEqualToString:kGoalWeightPlot]){
num = [[dataForPlot objectAtIndex:index] valueForKey:(fieldEnum == CPScatterPlotFieldX ? @"x" : @"y")];
}else {
if(fieldEnum == CPScatterPlotFieldX)
num = [[dataForPlot objectAtIndex:index] valueForKey:@"x"];
else {
num = [NSNumber numberWithFloat:self.refereceValue];
}
}
}
return num;
}
屏幕截图-
我想显示自定义标签
编辑：
我尝试添加示例CPTest-iPhoneApp的barChart + XIB的类。出现条形图，但没有轴标签。这是CPTest-iPhone应用程序和我的屏幕截图。
I've tried adding sample class of barChart+XIB from CPTest-iPhoneApp. The bar chart appears but axis label's don't. Here is the screenshot form CPTest-iPhone app and mine.
推荐答案
我已经解决了我的问题。我要做的就是从头开始添加core-plot。我从项目中删除了核心图，再次添加瞧！工作正常
I have resolved my problem. All I have to do is start adding core-plot from beginning. I removed core-plot from my project again add voila! it's working
这篇关于无法在核心图中的x轴和y轴标签上显示任何内容的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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