我使用核心图来生成使用webservices的各种类型的图。但是在生成大约60个图之后，图形scren看起来是空白的，在设备日志中给出了一条消息“核心动画未能分配9997432字节” 我们只在设备上遇到此问题，因为应用程序在模拟器上正常运行。
以下是代码片段，我们将数据从另一个类传递给下面的类。 .h文件
//
// LineGraph.h
// Graphs
//
// Created by Pawan on 12/12/11.
// Copyright 2011 __MyCompanyName__. All rights reserved.
//
#import <UIKit/UIKit.h>
#import "CorePlot-CocoaTouch.h"
@interface LineGraph1 : UIViewController<CPTPlotDataSource,UIPopoverControllerDelegate,CPTScatterPlotDelegate,CPTPlotSpaceDelegate> {
NSMutableArray *xAxisValuesArray;
NSMutableArray *yAxisValuesArray;
NSMutableArray *identifierArray;
NSMutableArray *xAxisScaleArray;
NSMutableArray *formattedDataLabelArray;
NSString *graphTitleLabel;
NSString *lineType;
NSString *xAxisTitleLabel;
NSString *yAxisMin;
NSString *yAxisMax;
NSString *yAxisIntervalLength;
NSString *yAxisTitle;
NSString *yAxisTitleLocation;
UILabel *valueLabel2;
float xAxiscount;
float intervalLength;
@private
CPTXYGraph *lineGraph;
CPTMutableTextStyle *titleTextStyle;
CPTLayerAnnotation *symbolTextAnnotation;
NSMutableArray *plotSymbolColoursArray;
NSMutableArray *plotLineColoursArray;
IBOutlet CPTGraphHostingView *lineGraphtView;
IBOutlet UILabel *lineGraphLabel;
IBOutlet UISlider *lineGraphValueSlider;
IBOutlet UIButton *drillUpButton;
IBOutlet UIButton *drillDownButton;
IBOutlet UIButton *helpButton;
}
@property(nonatomic,retain) IBOutlet CPTGraphHostingView *lineGraphtView;
@property(nonatomic,retain) CPTXYGraph *lineGraph;
@property(nonatomic,retain) NSMutableArray *xAxisValuesArray;
@property(nonatomic,retain) NSMutableArray *yAxisValuesArray;
@property(nonatomic,retain) IBOutlet UILabel *lineGraphLabel;
@property(nonatomic,retain) NSString *graphTitleLabel;
@property(nonatomic,retain) NSString *lineType;
@property(nonatomic,retain) NSString *xAxisTitleLabel;
@property(nonatomic,retain) NSString *yAxisTitleLocation;
@property(nonatomic,retain) NSString *yAxisMin;
@property(nonatomic,retain) NSString *yAxisMax;
@property(nonatomic,retain) NSString *yAxisIntervalLength;
@property(nonatomic,retain) NSString *yAxisTitle;
@property(nonatomic,retain) NSMutableArray *identifierArray;
@property(nonatomic,retain) NSMutableArray *plotSymbolColoursArray;
@property(nonatomic,retain) NSMutableArray *plotLineColoursArray;
@property(nonatomic,retain) NSMutableArray *xAxisScaleArray;
@property(nonatomic,retain) NSMutableArray *formattedDataLabelArray;
@property(nonatomic,retain) CPTMutableTextStyle *titleTextStyle;
- (void)constructLineGraphForSingleLineGraph:(NSString *)type;
-(IBAction)helpButtonPressed:(id)sender;
-(void)plotDataActionSlider:(id)sender;
-(void)setplotDataActionSlider;
@end
.m file
// LineGraph.m
// Graphs
//
// Created by Pawan on 12/12/11.
// Copyright 2011 __MyCompanyName__. All rights reserved.
//
#import "LineGraph1.h"
#import "CommonMethodForGraphs.h"
#import "GraphDescription.h"
@implementation LineGraph1
@synthesize lineGraph;
@synthesize xAxisValuesArray;
@synthesize yAxisValuesArray;
@synthesize graphTitleLabel;
@synthesize lineGraphLabel;
@synthesize lineType;
@synthesize xAxisTitleLabel;
@synthesize yAxisMin;
@synthesize yAxisMax;
@synthesize yAxisIntervalLength;
@synthesize yAxisTitle;
@synthesize yAxisTitleLocation;
@synthesize identifierArray;
@synthesize plotLineColoursArray;
@synthesize plotSymbolColoursArray;
@synthesize xAxisScaleArray;
@synthesize formattedDataLabelArray;
@synthesize titleTextStyle;
@synthesize lineGraphtView;
//Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
[self setplotDataActionSlider];
self.lineGraphLabel.text=self.graphTitleLabel;
NSMutableArray *identifierLocalArray=[[NSMutableArray alloc]init];
[identifierLocalArray insertObject:@"Port In" atIndex:0];
self.identifierArray=identifierLocalArray;
[identifierLocalArray release];
NSMutableArray *plotSymbolColoursLocalArray =[NSMutableArray arrayWithObjects:[CPTColor redColor],[CPTColor greenColor],nil];
NSMutableArray *plotLineColoursLocalArray =[NSMutableArray arrayWithObjects:[CPTColor greenColor],[CPTColor redColor],nil];
self.plotSymbolColoursArray=plotSymbolColoursLocalArray;
self.plotLineColoursArray=plotLineColoursLocalArray;
if ([self.xAxisValuesArray count]<=10)
{
xAxiscount = 10.0f;
}
else
{
xAxiscount = 31.0f;
}
[self constructLineGraphForSingleLineGraph:self.lineType];
}
#pragma mark -
#pragma mark constructLineGraphForSingleLineGraph
- (void)constructLineGraphForSingleLineGraph:(NSString *)type
{
// Create lineGraph from theme
CPTXYGraph *lineGraphLocalObject = [[CPTXYGraph alloc] initWithFrame:CGRectZero];
self.lineGraph = lineGraphLocalObject;
[lineGraphLocalObject release];
CPTTheme *theme = [CPTTheme themeNamed:kCPTPlainWhiteTheme];
self.lineGraph = (CPTXYGraph *)[theme newGraph];
/*
UIImage *image = [UIImage imageNamed:@"BackgroundforGraph.png"];
CGImageRef mycgimage = [image CGImage];
CPTImage *image1 = [CPTImage imageWithCGImage:mycgimage];
self.lineGraph.fill=[CPTFill fillWithImage:image1];
self.lineGraph.borderLineStyle = nil;
image = [UIImage imageNamed:@"PlotAreaImageNew.png"];
mycgimage = [image CGImage];
image1 = [CPTImage imageWithCGImage:mycgimage];
self.lineGraph.plotAreaFrame.fill = [CPTFill fillWithImage:image1];
*/
lineGraphtView.hostedGraph = self.lineGraph;
lineGraphtView.allowPinchScaling = NO;
self.lineGraph.plotAreaFrame.masksToBorder = NO;
//padding for plot area
self.lineGraph.paddingLeft = 110.0;
self.lineGraph.paddingTop = 20.0;
self.lineGraph.paddingRight = 10.0;
self.lineGraph.paddingBottom = 100.0;
// Add plot space for line graph
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *)self.lineGraph.defaultPlotSpace;
plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromString(self.yAxisMin) length:CPTDecimalFromString(self.yAxisMax)];
plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(0.0f) length:CPTDecimalFromFloat(xAxiscount)];
CPTXYAxisSet *axisSet = (CPTXYAxisSet *)self.lineGraph.axisSet;
CPTXYAxis *x = axisSet.xAxis;
x.majorIntervalLength = CPTDecimalFromString(@"1");
x.orthogonalCoordinateDecimal = CPTDecimalFromString(self.yAxisMin);
x.title =self.xAxisTitleLabel;
x.titleLocation = CPTDecimalFromFloat(5.0f);
x.titleOffset = 65.0f;
x.labelOffset=0.0f;
//text style initialized for both x and y axis....
CPTMutableTextStyle *titleTextStyleLocalObject = [[CPTMutableTextStyle alloc] init];
self.titleTextStyle = titleTextStyleLocalObject;
[titleTextStyleLocalObject release];
self.titleTextStyle.fontSize = 15;
x.titleTextStyle = self.titleTextStyle;
self.titleTextStyle.fontSize = 12;
x.labelTextStyle = self.titleTextStyle;
// Define some custom labels for the data elements
x.labelRotation = M_PI/4;
x.labelingPolicy = CPTAxisLabelingPolicyNone;
int labelLocation = 0;
NSMutableArray *customLabelsForXaxis = [NSMutableArray arrayWithCapacity:[self.xAxisScaleArray count]];
for (NSNumber *tickLocation in self.xAxisScaleArray)
{
CPTAxisLabel *newLabel = [[CPTAxisLabel alloc] initWithText: [self.xAxisScaleArray objectAtIndex:labelLocation++] textStyle:x.labelTextStyle];
newLabel.tickLocation = [[NSNumber numberWithInt:labelLocation] decimalValue] ;//[tickLocation decimalValue];
newLabel.offset =0.0;
newLabel.rotation = M_PI/4;
[customLabelsForXaxis addObject:newLabel];
[newLabel release];
}
x.axisLabels = [NSSet setWithArray:customLabelsForXaxis];
NSNumberFormatter *yAxisFormat = [[NSNumberFormatter alloc] init];
[yAxisFormat setNumberStyle:NSNumberFormatterNoStyle];
CPTXYAxis *y = axisSet.yAxis;
y.axisLineStyle = nil;
y.majorIntervalLength = CPTDecimalFromString(self.yAxisIntervalLength);
y.orthogonalCoordinateDecimal = CPTDecimalFromString(@"0");
y.titleOffset = 50.0f;
y.titleLocation = CPTDecimalFromString(self.yAxisTitleLocation);
y.labelOffset = 0.0f;
y.labelFormatter=yAxisFormat;
[yAxisFormat release];
y.title = self.yAxisTitle;
y.labelTextStyle = self.titleTextStyle;
CPTScatterPlot *dataSourceLinePlot = [[[CPTScatterPlot alloc] init] autorelease];
dataSourceLinePlot.identifier = [self.identifierArray objectAtIndex:0];
CPTMutableLineStyle *lineStyle = [[dataSourceLinePlot.dataLineStyle mutableCopy] autorelease];
lineStyle.lineWidth = 2.0f;
lineStyle.lineColor = [ self.plotLineColoursArray objectAtIndex:0];//[CPTColor clearColor];for scatterplot
dataSourceLinePlot.dataLineStyle = lineStyle;
dataSourceLinePlot.labelOffset=8.0f;
dataSourceLinePlot.dataSource = self;
dataSourceLinePlot.delegate = self;
// Add plot symbols
CPTPlotSymbol *plotSymbol = [CPTPlotSymbol ellipsePlotSymbol];
plotSymbol.fill = [CPTFill fillWithColor:[ self.plotSymbolColoursArray objectAtIndex:0]];
plotSymbol.size = CGSizeMake(10.0, 10.0);
dataSourceLinePlot.plotSymbol = plotSymbol;
// Put an area gradient under the plot above
CPTColor *areaColor = [CPTColor colorWithComponentRed:0.3 green:0.8 blue:0.3 alpha:0.6];
CPTGradient *areaGradient = [CPTGradient gradientWithBeginningColor:areaColor endingColor:[CPTColor clearColor]];
areaGradient.angle = -90.0;
CPTFill* areaGradientFill = [CPTFill fillWithGradient:areaGradient];
dataSourceLinePlot.areaFill = areaGradientFill;
dataSourceLinePlot.areaBaseValue = CPTDecimalFromString(@"0.0");
[self.lineGraph addPlot:dataSourceLinePlot];
y.labelingPolicy = CPTAxisLabelingPolicyNone;
intervalLength = [CommonMethodForGraphs formattedIntervalLengthForgraph:self.yAxisIntervalLength];
double j=[self.yAxisMin intValue];
NSMutableArray *customTickLocationsForYaxis = [[NSMutableArray alloc]init];
NSMutableArray *yAxisLabels =[[NSMutableArray alloc]init];
for (int h=0; h<=10; h++)
{
[customTickLocationsForYaxis insertObject:[NSDecimalNumber numberWithLongLong:j] atIndex:h];
[yAxisLabels insertObject:[[NSNumber numberWithLongLong:j/intervalLength]stringValue] atIndex:h];
j=j+[self.yAxisIntervalLength longLongValue];
}
labelLocation = 0;
NSMutableArray *customLabelsForYaxis = [[NSMutableArray alloc] initWithCapacity:[yAxisLabels count]];
for (NSNumber *tickLocationForYaxis in customTickLocationsForYaxis)
{
CPTAxisLabel *newLabel = [[CPTAxisLabel alloc] initWithText: [yAxisLabels objectAtIndex:labelLocation++] textStyle:x.labelTextStyle];
newLabel.tickLocation = [tickLocationForYaxis decimalValue];
newLabel.offset = y.labelOffset + y.majorTickLength;
[customLabelsForYaxis addObject:newLabel];
[newLabel release];
}
y.axisLabels = [NSSet setWithArray:customLabelsForYaxis];
[customLabelsForYaxis release];
[customTickLocationsForYaxis release];
[yAxisLabels release];
}
#pragma mark -
#pragma mark delegates for Line graph
-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot
{
int recordCount = 0;
for (int i=0; i<[self.identifierArray count]; i++)
{
if ( [plot.identifier isEqual:[self.identifierArray objectAtIndex:i] ])
{
recordCount= [self.yAxisValuesArray count];
}
}
return recordCount;
}
-(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index
{
NSNumber *num = nil;
if( [plot.identifier isEqual:[self.identifierArray objectAtIndex:0] ])
{
switch (fieldEnum)
{
case CPTScatterPlotFieldX:
num = [self.xAxisValuesArray objectAtIndex:index];
break;
case CPTScatterPlotFieldY:
num = [self.yAxisValuesArray objectAtIndex:index];
break;
}
}
return num;
}
-(CPTLayer *)dataLabelForPlot:(CPTPlot *)plot recordIndex:(NSUInteger)index
{
static CPTMutableTextStyle *whiteText = nil;
if ( !whiteText)
{
whiteText = [[CPTMutableTextStyle alloc] init];
whiteText.color = [CPTColor blackColor];
whiteText.fontSize=12.0f;
}
CPTTextLayer *newLayer = nil;
if (index%2==0)
{
plot.labelOffset=-0.5;
}
else
{
plot.labelOffset=0.5;
}
if ( [plot.identifier isEqual:[self.identifierArray objectAtIndex:0]])
{
newLayer = [[[CPTTextLayer alloc] initWithText:[NSString stringWithFormat:@"%.1f%",[[self.formattedDataLabelArray objectAtIndex:index]floatValue]] style:whiteText] autorelease];
[whiteText release];
}
return newLayer;
}
-(void)scatterPlot:(CPTScatterPlot *)plot plotSymbolWasSelectedAtRecordIndex:(NSUInteger)index
{
if ( symbolTextAnnotation ) {
[self.lineGraph.plotAreaFrame.plotArea removeAnnotation:symbolTextAnnotation];
symbolTextAnnotation = nil;
}
// Setup a style for the annotation
CPTMutableTextStyle *hitAnnotationTextStyle = [CPTMutableTextStyle textStyle];
hitAnnotationTextStyle.color = [CPTColor redColor];
hitAnnotationTextStyle.fontSize = 16.0f;
hitAnnotationTextStyle.fontName = @"Helvetica-Bold";
// Determine point of symbol in plot coordinates
NSNumber *x = [self.xAxisValuesArray objectAtIndex:index];
NSString *y = [self.yAxisValuesArray objectAtIndex:index];
NSArray *anchorPoint = [NSArray arrayWithObjects:x, y, nil];
// Now add the annotation to the plot area
CPTTextLayer *textLayer = [[[CPTTextLayer alloc] initWithText:y style:hitAnnotationTextStyle] autorelease];
symbolTextAnnotation = [[CPTPlotSpaceAnnotation alloc] initWithPlotSpace:self.lineGraph.defaultPlotSpace anchorPlotPoint:anchorPoint];
symbolTextAnnotation.contentLayer = textLayer;
symbolTextAnnotation.displacement = CGPointMake(0.0f, 20.0f);
[self.lineGraph.plotAreaFrame.plotArea addAnnotation:symbolTextAnnotation];
[textLayer release];
[symbolTextAnnotation release];
}
#pragma mark -
#pragma mark method for slider action
-(void)plotDataActionSlider:(id)sender
{
if (lineGraphValueSlider.value<=[self.yAxisValuesArray count]+1)
{
//code to remove added imageView
[[self.view viewWithTag:50] removeFromSuperview];
//code to remove added label
[[self.view viewWithTag:100] removeFromSuperview];
for (int d=0; d<[self.yAxisValuesArray count]; d++)
{
if ((int)lineGraphValueSlider.value==[[self.xAxisValuesArray objectAtIndex:d]intValue])
{
int x=300;
valueLabel2=[[UILabel alloc]init];
valueLabel2.frame=CGRectMake(x, 620, 300, 40);
valueLabel2.tag=100;
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setNumberStyle:NSNumberFormatterDecimalStyle];
NSLocale *locale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US"];
[formatter setLocale:locale];
valueLabel2.text= [[[self.xAxisScaleArray objectAtIndex:d] stringByAppendingString:@" : "] stringByAppendingString:[formatter stringFromNumber:[NSNumber numberWithLongLong:[[self.yAxisValuesArray objectAtIndex:d]longLongValue]]]];
[self.view addSubview:valueLabel2];
[valueLabel2 release];
[formatter release];
}
}
}
else
{
[[self.view viewWithTag:50] removeFromSuperview];
[[self.view viewWithTag:100] removeFromSuperview];
}
}
-(void)setplotDataActionSlider
{
UIImage *minImage = [UIImage imageNamed:@"SliderRoll.png"];
UIImage *tumbImage= [UIImage imageNamed:@"SliderArrow.png"];
minImage=[minImage stretchableImageWithLeftCapWidth:0 topCapHeight:0];
// Setup the slider
[lineGraphValueSlider setMinimumTrackImage:minImage forState:UIControlStateNormal];
[lineGraphValueSlider setThumbImage:tumbImage forState:UIControlStateNormal];
lineGraphValueSlider.minimumValue = 0.0;
if ([self.xAxisValuesArray count]<=10)
{
lineGraphValueSlider.maximumValue = 10.0;
}
else
{
lineGraphValueSlider.maximumValue = 31.0;
}
lineGraphValueSlider.continuous = YES;
[lineGraphValueSlider addTarget:self action:@selector(plotDataActionSlider :) forControlEvents:UIControlEventValueChanged];
minImage = nil;
tumbImage = nil;
}
#pragma mark -
#pragma mark method for help drill up and drill down
-(IBAction)helpButtonPressed:(id)sender{
[CommonMethodForGraphs helpButtonActionForAllGraphs:self.view];
}
#pragma mark -
//Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations.
return ((interfaceOrientation == UIInterfaceOrientationLandscapeLeft) ||(interfaceOrientation == UIInterfaceOrientationLandscapeRight));
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc. that aren't in use.
}
- (void)viewDidUnload {
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
self.lineGraphLabel = nil;
self.lineGraphtView = nil;
}
- (void)dealloc {
[lineGraph release];
[xAxisValuesArray release];
[yAxisValuesArray release];
[xAxisTitleLabel release];
[graphTitleLabel release];
[lineGraphLabel release];
[lineType release];
[yAxisMin release];
[yAxisMax release];
[yAxisIntervalLength release];
[yAxisTitle release];
[yAxisTitleLocation release];
[identifierArray release];
[plotLineColoursArray release];
[plotSymbolColoursArray release];
[xAxisScaleArray release];
[formattedDataLabelArray release];
[lineGraphtView release];
[super dealloc];
}
@end
答案 0 :(得分：0)
不确定这是否会产生很大的不同，但这两种方法似乎使用不同的逻辑
-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot
{
int recordCount = 0;
for (int i=0; i<[self.identifierArray count]; i++)
{
if ( [plot.identifier isEqual:[self.identifierArray objectAtIndex:i] ])
{
recordCount= [self.yAxisValuesArray count];
}
}
return recordCount;
}
-(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index
{
NSNumber *num = nil;
if( [plot.identifier isEqual:[self.identifierArray objectAtIndex:0] ])
{
switch (fieldEnum)
{
case CPTScatterPlotFieldX:
num = [self.xAxisValuesArray objectAtIndex:index];
break;
case CPTScatterPlotFieldY:
num = [self.yAxisValuesArray objectAtIndex:index];
break;
}
}
return num;
}
我建议使用
中的相同逻辑-(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index
在另一种方法中
-(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index
如果你的图表可以确认只有一个图吗？
答案 1 :(得分：0)
内存中的所有60个图表是否同时存在？如果是这样，您可能会耗尽Core Animation的内存或其他GPU资源。请务必释放您不再使用的图表和/或图表以释放资源。