BarPlot.hとBarPlot.m、BarPlotViewController.hとBarPlotViewController.mの4つのファイルがありますが、グラフを表示するためにBarplotViewControllerを取得できません。
ストーリーボードで正しいViewControllerが呼び出されていることを確認しました。
コードを何度も調べましたが、シミュレーターでアプリを実行したときにビューが表示されない理由がわかりません。
以下のファイルを含めました。
ありとあらゆる助けを大いに感謝します。
BarPlotViewController.h
#import <UIKit/UIKit.h>
#import "CorePlot-CocoaTouch.h"
#import "BarPlot.h"
@interface BarPlotViewController : UIViewController {
CPTGraphHostingView *_graphHostingView;
}
@property (nonatomic, retain) BarPlot *barPlot;
@end
BarPlotViewController.m
#import "BarPlotViewController.h"
@implementation BarPlotViewController
@synthesize barPlot = _barPlot;
- (void)viewWillAppear:(BOOL)animated
{
self.barPlot = [[BarPlot alloc] initWithHostingView:_graphHostingView];
[self.barPlot generateBarPlot];
}
@end
BarPlot.h
#import <UIKit/UIKit.h>
#import "CorePlot-CocoaTouch.h"
@interface BarPlot : UIViewController <CPTBarPlotDataSource, CPTBarPlotDelegate> {
CPTGraphHostingView *_hostingView;
CPTXYGraph *_graph;
}
@property (nonatomic, retain) NSMutableArray *data;
@property (nonatomic, retain) CPTGraphHostingView *hostingView;
@property (nonatomic, retain) CPTXYGraph *graph;
// Methods to create this object and attach it to it's hosting view.
-(id)initWithHostingView:(CPTGraphHostingView *)hostingView;
// Generate the bar plot
- (void) generateBarPlot;
@end
BarPlot.m
#import "BarPlot.h"
@implementation BarPlot
#define BAR_POSITION @"POSITION"
#define BAR_HEIGHT @"HEIGHT"
#define COLOR @"COLOR"
#define CATEGORY @"CATEGORY"
#define AXIS_START 0
#define AXIS_END 50
@synthesize data;
@synthesize hostingView = _hostingView;
@synthesize graph = _graph;
// Initialise the bar plot in the provided hosting
-(id)initWithHostingView:(CPTGraphHostingView *)hostingView
{
self = [super init];
if ( self != nil ) {
self.hostingView = hostingView;
self.graph = nil;
}
NSLog(@"Bar Plot: I'm in the initWithHostingView (in the barplot.m file)");
return self;
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.data = [NSMutableArray array];
int bar_heights[] = {20,30};
UIColor *colors[] = {
[UIColor redColor],
[UIColor blueColor],
[UIColor orangeColor],
[UIColor purpleColor]};
NSString *categories[] = {@"", @""};
for (int i = 0; i < 2 ; i++){
double position = i*20; //Bars will be 10 pts away from each other
double height = bar_heights[i];
NSDictionary *bar = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithDouble:position],BAR_POSITION,
[NSNumber numberWithDouble:height],BAR_HEIGHT,
colors[i],COLOR,
categories[i],CATEGORY,
nil];
[self.data addObject:bar];
}
[self generateBarPlot];
}
return self;
}
- (void)generateBarPlot
{
//Create host view
/*self.hostingView = [[CPTGraphHostingView alloc]
initWithFrame:[[UIScreen mainScreen]bounds]];
[self.view addSubview:self.hostingView];
//Create graph and set it as host view's graph
self.graph = [[CPTXYGraph alloc] initWithFrame:self.hostingView.bounds];
[self.hostingView setHostedGraph:self.graph];*/
// Create a graph object which we will use to host just one scatter plot.
CGRect frame = [self.hostingView bounds];
self.graph = [[CPTXYGraph alloc] initWithFrame:frame];
// Tie the graph we've created with the hosting view.
self.hostingView.hostedGraph = self.graph;
//set graph padding and theme
self.graph.plotAreaFrame.paddingTop = 20.0f;
self.graph.plotAreaFrame.paddingRight = 20.0f;
self.graph.plotAreaFrame.paddingBottom = 70.0f;
self.graph.plotAreaFrame.paddingLeft = 70.0f;
[self.graph applyTheme:[CPTTheme themeNamed:kCPTDarkGradientTheme]];
// Gets rid of decimal on years
NSNumberFormatter *labelFormatter = [[NSNumberFormatter alloc] init];
labelFormatter.maximumFractionDigits = 0;
//set axes ranges
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *)self.graph.defaultPlotSpace;
plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:
CPTDecimalFromFloat(AXIS_START)
length:CPTDecimalFromFloat((AXIS_END - AXIS_START))];
plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:
CPTDecimalFromFloat(AXIS_START)
length:CPTDecimalFromFloat((AXIS_END - AXIS_START))];
CPTXYAxisSet *axisSet = (CPTXYAxisSet *)self.graph.axisSet;
//set axes' title, labels and their text styles
CPTMutableTextStyle *textStyle = [CPTMutableTextStyle textStyle];
textStyle.fontName = @"Helvetica";
textStyle.fontSize = 14;
textStyle.color = [CPTColor whiteColor];
axisSet.xAxis.title = @"A";
axisSet.yAxis.title = @"B";
axisSet.xAxis.titleTextStyle = textStyle;
axisSet.yAxis.titleTextStyle = textStyle;
axisSet.xAxis.titleOffset = 30.0f;
axisSet.yAxis.titleOffset = 40.0f;
axisSet.xAxis.labelTextStyle = textStyle;
axisSet.yAxis.labelTextStyle = textStyle;
axisSet.xAxis.labelOffset = 3.0f;
axisSet.yAxis.labelOffset = 3.0f;
//set axes' line styles and interval ticks
CPTMutableLineStyle *lineStyle = [CPTMutableLineStyle lineStyle];
lineStyle.lineColor = [CPTColor whiteColor];
lineStyle.lineWidth = 3.0f;
axisSet.xAxis.axisLineStyle = lineStyle;
axisSet.yAxis.axisLineStyle = lineStyle;
axisSet.xAxis.majorTickLineStyle = lineStyle;
axisSet.yAxis.majorTickLineStyle = lineStyle;
axisSet.xAxis.majorIntervalLength = CPTDecimalFromFloat(5.0f);
axisSet.yAxis.majorIntervalLength = CPTDecimalFromFloat(5.0f);
axisSet.xAxis.majorTickLength = 10.0f;
axisSet.yAxis.majorTickLength = 10.0f;
axisSet.xAxis.minorTickLineStyle = lineStyle;
axisSet.yAxis.minorTickLineStyle = lineStyle;
axisSet.xAxis.minorTicksPerInterval = 1;
axisSet.yAxis.minorTicksPerInterval = 1;
axisSet.xAxis.minorTickLength = .0f;
axisSet.yAxis.minorTickLength = .0f;
axisSet.xAxis.labelFormatter = labelFormatter;
axisSet.yAxis.labelFormatter = labelFormatter;
// Create bar plot and add it to the graph
CPTBarPlot *plot = [[CPTBarPlot alloc] init] ;
plot.delegate = self;
plot.dataSource = self;
plot.barWidth = [[NSDecimalNumber decimalNumberWithString:@"5.0"]
decimalValue];
plot.barOffset = [[NSDecimalNumber decimalNumberWithString:@"10.0"]
decimalValue];
plot.barCornerRadius = 5.0;
// Remove bar outlines
CPTMutableLineStyle *borderLineStyle = [CPTMutableLineStyle lineStyle];
borderLineStyle.lineColor = [CPTColor clearColor];
plot.lineStyle = borderLineStyle;
// Identifiers are handy if you want multiple plots in one graph
plot.identifier = @"chocoplot";
[self.graph addPlot:plot];
}
-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot
{
if ( [plot.identifier isEqual:@"chocoplot"] )
{
return [self.data count];
}
return 0;
}
-(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index
{
if ( [plot.identifier isEqual:@"chocoplot"] )
{
NSDictionary *bar = [self.data objectAtIndex:index];
if( fieldEnum == 2 ) {
return [bar valueForKey:BAR_POSITION];
//return [NSNumber numberWithDouble:20];
}
else if( fieldEnum == 3 ) {
return [bar valueForKey:BAR_HEIGHT];
//return [NSNumber numberWithDouble:20];
}
}
NSLog(@"numberForPlot return before");
return [NSNumber numberWithDouble:15];
}
@end