我查看了大多数似乎最相关的问题，但没有一个真正触及我目前遇到的一些麻烦。我的问题是，虽然我知道无论我如何更新它都需要更新plotSpace.xRange，但是没有任何反应，或者我发生了崩溃。
我目前正在做的是我在RealTimeScatterPlot.m文件中声明了2个全局变量（xMinVal，xMaxVal），这些是我在绘图初始化时用于plotSpace.xRange的计算。然后，我托管绘图视图的viewcontroller包含一个每秒生成并绘制一个随机点的函数。在这个函数里面，我跟踪我是否有超过25个（我的默认x轴范围从0到50），如果我这样做，我会尝试将RealTimeScatterPlot.m中的全局值递增1，理论上应该将我的图形视图移动1.第一次增量发生，虽然视图没有移动，但我也不能再次增加，因为值保持不变。如果看到代码会让我知道，我会编辑它，但它非常简单/通用。我认为这可能不是我应该实现的方式而不是编码问题。
非常感谢任何见解！
答案 0 :(得分：4)
您可以像tableview数据更新一样轻松地执行您想要的操作。 这是代码的一部分，我已经完成了你可以用它作为参考。希望这可以帮到你。
-(void) fetchArrayOffeedback {
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Pulse"
inManagedObjectContext:appDelegate.managedObjectContext];
[fetchRequest setEntity:entity];
NSPredicate *predictate = [NSPredicate predicateWithFormat:@"sessionKey == %@", appDelegateiPhone.strSessionId];
[fetchRequest setPredicate:predictate];
NSSortDescriptor *sort = [[NSSortDescriptor alloc]
initWithKey:@"date" ascending:YES];
[fetchRequest setSortDescriptors:[NSArray arrayWithObject:sort]];
[sort release];
NSError *error;
chartData = (NSMutableArray*)[appDelegate.managedObjectContext
executeFetchRequest:fetchRequest error:&error];
[chartData retain];
NSLog(@"array count :%d", [chartData count]);
[graph reloadData];
CPXYPlotSpace *plotSpace = (CPXYPlotSpace *)graph.defaultPlotSpace;
plotSpace.xRange = [CPPlotRange plotRangeWithLocation:CPDecimalFromFloat(0.0) length:CPDecimalFromFloat(fiveHour*3)];
}
- (void)constructScatterPlotForFeedback
{
[graph release];
graph = [[CPXYGraph alloc] initWithFrame:CGRectZero];
graph.delegate = self;
CPTheme *theme = [CPTheme themeNamed:kCPPlainWhiteTheme];
[graph applyTheme:theme];
feedbackChart.hostedGraph = graph;
[feedbackChart setBackgroundColor:[UIColor clearColor]];
graph.paddingLeft = 0.0;
graph.paddingTop = 0.0;
graph.paddingRight = 0.0;
graph.paddingBottom = 0.0;
graph.plotAreaFrame.paddingLeft = 5.0;
graph.plotAreaFrame.paddingTop = 10.0;
graph.plotAreaFrame.paddingRight = 10.0;
graph.plotAreaFrame.paddingBottom = 10.0;
NSTimeInterval oneHour = 60 * 60;
CPXYPlotSpace *plotSpace = (CPXYPlotSpace *)graph.defaultPlotSpace;
plotSpace.allowsUserInteraction = YES;
plotSpace.delegate = self;
float xRange;
xRange = [chartData count] + 1.0;
if (xRange>5) {
xRange = 5.0;
}
plotSpace.xRange = [CPPlotRange plotRangeWithLocation:CPDecimalFromFloat(0.0) length:CPDecimalFromFloat(fiveHour*3)];
plotSpace.yRange = [CPPlotRange plotRangeWithLocation:CPDecimalFromFloat(-20.0) length:CPDecimalFromFloat(40.0)];
CPLineStyle *gridline = [CPLineStyle lineStyle];
gridline.lineColor = [CPColor grayColor];
gridline.lineWidth = 1.0f;
CPXYAxisSet *axisSet = (CPXYAxisSet *)graph.axisSet;
CPXYAxis *x = axisSet.xAxis;
x.majorIntervalLength = CPDecimalFromFloat(fiveHour);
x.minorTicksPerInterval = 0;
x.labelOffset=0;
NSDate *refDate = [NSDate date];
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
dateFormatter.dateFormat = @"HH:mm:ss";
CPTimeFormatter *timeFormatter = [[[CPTimeFormatter alloc] initWithDateFormatter:dateFormatter] autorelease];
timeFormatter.referenceDate = refDate;
x.labelFormatter = timeFormatter;
CPXYAxis *y = axisSet.yAxis;
y.minorTicksPerInterval = 0;
y.orthogonalCoordinateDecimal = CPDecimalFromString(@"0.0");
y.majorIntervalLength = CPDecimalFromString(@"5");
y.majorGridLineStyle = nil;
y.visibleRange = [CPPlotRange plotRangeWithLocation:CPDecimalFromFloat(-20.0f) length:CPDecimalFromFloat(40.0f)];
CPConstraints yConstraints = {CPConstraintNone, CPConstraintFixed};
y.isFloatingAxis=YES;
y.constraints=yConstraints;
CPScatterPlot *dataSourceLinePlot = [[[CPScatterPlot alloc] init] autorelease];
dataSourceLinePlot.identifier = @"FeedBack Plot";
dataSourceLinePlot.dataLineStyle.lineWidth = 3.f;
dataSourceLinePlot.dataLineStyle.lineColor = [CPColor blackColor];
dataSourceLinePlot.dataLineStyle.dashPattern = [NSArray arrayWithObjects:[NSNumber numberWithFloat:1.0f], [NSNumber numberWithFloat:1.0f], nil];
dataSourceLinePlot.dataSource = self;
dataSourceLinePlot.opacity = 0.0f;
dataSourceLinePlot.cachePrecision = CPPlotCachePrecisionDecimal;
CABasicAnimation *fadeInAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
fadeInAnimation.duration = 1.0f;
fadeInAnimation.removedOnCompletion = NO;
fadeInAnimation.fillMode = kCAFillModeForwards;
fadeInAnimation.toValue = [NSNumber numberWithFloat:1.0];
[dataSourceLinePlot addAnimation:fadeInAnimation forKey:@"animateOpacity"];
CPColor *areaColor1 = [CPColor colorWithComponentRed:0.3 green:0.3 blue:1.0 alpha:0.8];
CPGradient *areaGradient1 = [CPGradient gradientWithBeginningColor:areaColor1 endingColor:[CPColor clearColor]];
areaGradient1.angle = -90.0f;
NSUInteger i;
[graph addPlot:dataSourceLinePlot];
NSMutableArray *contentArray1 = [NSMutableArray arrayWithCapacity:100];
NSMutableArray *customTickLocations = [[NSMutableArray alloc] init];
NSMutableArray *xAxisLabels = [[NSMutableArray alloc] init];
for ( i = 0; i < [chartData count]; i++ ) {
//for ( i = 0; i < 10; i++ ) {
[customTickLocations addObject:[NSDecimalNumber numberWithInt:i]];
[xAxisLabels addObject:[NSString stringWithFormat:@"%0.1f", 5.0 * i]];
Pulse *objPulse1 = (Pulse *)[chartData objectAtIndex:i];
// id x = [NSNumber numberWithFloat:i*fiveHour];
id x = [NSNumber numberWithFloat:i];
id y = [NSNumber numberWithFloat:[objPulse1.feedBack floatValue]];
NSLog(@"point of gragh for Performance x:%@, y : %@ ", x, y);
[contentArray1 addObject:[NSMutableDictionary dictionaryWithObjectsAndKeys:x, @"x", y, @"y", nil]];
}
NSLog(@"Axis lable count : %d", [xAxisLabels count]);
NSMutableArray *customLabels = [NSMutableArray arrayWithCapacity:[chartData count]];
NSUInteger labelLocation = 0;
for (NSNumber *tickLocation in customTickLocations) {
NSLog(@">>>>>>>>>>>>>>>>> tick location");
CPAxisLabel *newLabel = [[CPAxisLabel alloc] initWithText: [xAxisLabels objectAtIndex:labelLocation++] textStyle:x.labelTextStyle];
newLabel.tickLocation = [tickLocation decimalValue];
newLabel.offset = x.labelOffset + x.majorTickLength - 5.0f;
newLabel.rotation = 0;
[customLabels addObject:newLabel];
[newLabel release];
}
x.axisLabels = [NSSet setWithArray:customLabels];
arrScatter = contentArray1;
[arrScatter retain];
}
-(NSUInteger)numberOfRecordsForPlot:(CPPlot *)plot
{
if ( [(NSString *)plot.identifier isEqualToString:@"FeedBack Plot"] ) {
return [chartData count];
}
return 0;
}
-(NSNumber *)numberForPlot:(CPPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index
{
switch ( fieldEnum ) {
case CPScatterPlotFieldX:
return (NSDecimalNumber *)[NSDecimalNumber numberWithUnsignedInteger:index*fiveHour];
case CPScatterPlotFieldY:
{
Pulse *objPulse1 = (Pulse *)[chartData objectAtIndex:index];
return [NSNumber numberWithFloat:[objPulse1.feedBack floatValue]];
}
}
return nil;
}
-(CGPoint)plotSpace:(CPPlotSpace *)space willDisplaceBy:(CGPoint)displacement {
return CGPointMake(displacement.x, 0);
}
/*
-(NSNumber *)numberForPlot:(CPPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index
{
NSDecimalNumber *num = nil;
if ( [(NSString *)plot.identifier isEqualToString:@"FeedBack Plot"] ) {
if ( [arrScatter count] != 0) {
num = [[arrScatter objectAtIndex:index] valueForKey:(fieldEnum == CPScatterPlotFieldX ? @"x" : @"y")];
}
}
return num;
}
*/
-(CPLayer *)dataLabelForPlot:(CPPlot *)plot recordIndex:(NSUInteger)index {
Pulse *objPulse1 = (Pulse *)[chartData objectAtIndex:index];
float value = [objPulse1.feedBack floatValue];
//CPTextLayer *textLayer = [[CPTextLayer alloc] initWithText:[NSString stringWithFormat:@"%d", value]];
CPTextStyle *textStyle = [CPTextStyle textStyle];
textStyle.color = [CPColor blackColor];
CPTextLayer *textLayer = [[CPTextLayer alloc] initWithText:[NSString stringWithFormat:@"%0.1f", value] style:textStyle];
return textLayer;
}
答案 1 :(得分：1)
我将这样的真实情节图划分为：
注意：我没有在这里使用一些方法来绘制标签并确定图表的清晰度 我把现在的代码展示给创建实时情节的想法。
#import <CorePlot/CorePlot.h>
#import <Cocoa/Cocoa.h>
#import "sharedPrefferences.h"
#import "RMBlurredView.h"//Not really needed I am just using it for my custom label
@interface GenericCPTGraphView : NSView <CPTPlotDataSource,CPTPlotSpaceDelegate>
{
CPTGraphHostingView *hostView;
CPTXYGraph *graph;
NSMutableArray *plotData;
NSTextField* percentLabel;
CPTMutableLineStyle *lineStyle;
CPTScatterPlot *dataSourceLinePlot;
NSInteger currentIndex;
NSTimer* dataTimer;
BOOL animated;
}
-(void)updateGraph :(NSNumber*)Load;//method that will add the new Dots to the plot.
@end
in my.m
#define SECTION_COUNT 15 //maybe will be changed to 16 who knows.
static const double kAlpha = 0.25; // smoothing constant
static const NSUInteger kMaxDataPoints = 40;
static NSString *const kPlotIdentifier = @"Data Source Plot";
@implementation GenericCPTGraphView
- (id)initWithFrame:(NSRect)frame
{
self = [super initWithFrame:frame];
if (self)
{
plotData = [[NSMutableArray alloc] initWithCapacity:kMaxDataPoints];
[self generateData];//create plot method
[self checkGraph];
}
return self;
}
-(void)checkGraph
{
currentIndex=0;
NSDate *refDate = [NSDate dateWithNaturalLanguageString:@"12:00 Oct 29, 2009"];
NSTimeInterval oneDay = 1;
// Create graph from theme
graph = [[CPTXYGraph alloc] initWithFrame:CGRectZero];
CPTTheme *theme = [CPTTheme themeNamed:kCPTSlateTheme];
[graph applyTheme:theme];
graph.paddingLeft = 1.0;
graph.paddingTop = 1.0;
graph.paddingRight = 1.0;
graph.paddingBottom = 1.0;
graph.fill = [CPTFill fillWithColor:[CPTColor clearColor]];
graph.plotAreaFrame.fill = [CPTFill fillWithColor:[self getCPTColorObjectFromHexString:@"062118" alpha:1.0]];
graph.plotAreaFrame.borderLineStyle = nil;
graph.plotAreaFrame.cornerRadius = 0;
hostView = [[CPTGraphHostingView alloc]initWithFrame:CGRectMake(0,0,self.frame.size.width,self.frame.size.height)];
hostView.hostedGraph = graph;
RMBlurredView *LabelView = [[RMBlurredView alloc]initWithFrame:CGRectMake(1,0+hostView.frame.size.height-16 , hostView.frame.size.width-2, 15)];
[LabelView setTintColor:[sharedPrefferences colorWithHexColorString:@"000000" alpha:0.5]];
NSTextField* textLabel = [[NSTextField alloc]initWithFrame:CGRectMake(0, 1, LabelView.frame.size.width, 15)];
dataSourceLinePlot.identifier = (__bridge id<NSCopying,NSCoding,NSObject>)(kMDItemIdentifier);
[textLabel setTextColor:[NSColor whiteColor]];
// textLabel
[textLabel setBezeled:NO];
[textLabel setDrawsBackground:NO];
[textLabel setEditable:NO];
[textLabel setSelectable:NO];
[textLabel setStringValue:@"LOAD"];
[textLabel sizeToFit];
percentLabel = [[NSTextField alloc]initWithFrame:CGRectMake(0, 1, LabelView.frame.size.width, 15)];
[percentLabel setTextColor:[NSColor whiteColor]];
[percentLabel setBezeled:NO];
[percentLabel setDrawsBackground:NO];
[percentLabel setEditable:NO];
[percentLabel setSelectable:NO];
// [percentLabel setStringValue:@"X%"];
//[percentLabel sizeToFitWithAlignmentRight];
LabelView.blurRadius = 0;
dataSourceLinePlot = [[CPTScatterPlot alloc] init];
dataSourceLinePlot.dataSource = self;
[graph addPlot:dataSourceLinePlot];
// Setup scatter plot space
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *)graph.defaultPlotSpace;
plotSpace.allowsUserInteraction = NO;
plotSpace.delegate = self;
CABasicAnimation *fadeInAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
fadeInAnimation.duration = 1.0f;
fadeInAnimation.removedOnCompletion = NO;
fadeInAnimation.fillMode = kCAFillModeForwards;
fadeInAnimation.toValue = [NSNumber numberWithFloat:1.0];
[dataSourceLinePlot addAnimation:fadeInAnimation forKey:@"animateOpacity"];
[graph addPlot:dataSourceLinePlot];
NSTimeInterval xLow = 0.0;
plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromDouble(xLow) length:CPTDecimalFromDouble(oneDay * 40.0)];
plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromDouble(0.0) length:CPTDecimalFromDouble(100.0)];
// Axes
CPTXYAxisSet *axisSet = (CPTXYAxisSet *)graph.axisSet;
CPTXYAxis *x = axisSet.xAxis;
x.hidden = YES;
x.majorIntervalLength = CPTDecimalFromFloat(oneDay);
x.orthogonalCoordinateDecimal = CPTDecimalFromDouble(0.0);
x.minorTicksPerInterval = 0;
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.dateStyle = kCFDateFormatterShortStyle;
CPTTimeFormatter *timeFormatter = [[CPTTimeFormatter alloc] initWithDateFormatter:dateFormatter];
timeFormatter.referenceDate = refDate;
x.labelFormatter = timeFormatter;
CPTXYAxis *y = axisSet.yAxis;
y.hidden = YES;
y.majorIntervalLength = CPTDecimalFromDouble(0.5);
y.minorTicksPerInterval = 1;
y.orthogonalCoordinateDecimal = CPTDecimalFromFloat(oneDay);
// Create a plot that uses the data source method
//CPTScatterPlot *dataSourceLinePlot = [[CPTScatterPlot alloc] init];
y.minorTicksPerInterval = 0;
[LabelView addSubview:percentLabel];
[LabelView addSubview:textLabel];
[graph.hostingView addSubview:LabelView];
[self addSubview:hostView];
}
-(void)updateGraph :(NSNumber*)Load
{
if ( dataSourceLinePlot ) {
if ( plotData.count >= 40 ) {
[plotData removeObjectAtIndex:0];
[dataSourceLinePlot deleteDataInIndexRange:NSMakeRange(0, 1)];
}
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *)graph.defaultPlotSpace;
plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromUnsignedInteger(0) length:CPTDecimalFromUnsignedInteger(kMaxDataPoints - 2)];
plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromUnsignedInteger(0) length:CPTDecimalFromUnsignedInteger(1)];
NSUInteger location = (currentIndex >= kMaxDataPoints ? currentIndex - kMaxDataPoints + 2 : 0);
CPTPlotRange *newRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromUnsignedInteger(location)
length:CPTDecimalFromUnsignedInteger(kMaxDataPoints - 2)];
plotSpace.xRange = newRange;
currentIndex++;
[plotData addObject:[NSNumber numberWithDouble:((Load.doubleValue - kAlpha) / 100.0)]];
[percentLabel setStringValue:[NSString stringWithFormat:@"%ld%%",(Load.integerValue) ]];
graph.borderWidth = 0.0 ;
dataSourceLinePlot.borderWidth = 0.0;
[dataSourceLinePlot setBorderWidth:0.0];
dataSourceLinePlot.identifier = @"Date Plot";
lineStyle = [dataSourceLinePlot.dataLineStyle mutableCopy];
lineStyle.lineWidth = 2.0;
[percentLabel sizeToFitWithAlignmentRight];
lineStyle.lineColor = [self decideColor: [self numberOfSectionsToHighlight:Load.doubleValue]];
dataSourceLinePlot.dataLineStyle = lineStyle;
[dataSourceLinePlot insertDataAtIndex:(plotData.count - 1) numberOfRecords:1];//inserting object to the plot.
}
}
#pragma mark -
#pragma mark Plot Data Source Methods
-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot
{
NSLog(@"%lu",(unsigned long)plotData.count);
return plotData.count;
}
-(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index
{
NSNumber *num = nil;
switch ( fieldEnum ) {
case CPTScatterPlotFieldX:
num = [NSNumber numberWithUnsignedInteger:index + currentIndex - plotData.count];
break;
case CPTScatterPlotFieldY:
num = [plotData objectAtIndex:index];
break;
default:
break;
}
return num;
}
@end