目前，我正在使用Coreplot的图形框架来实现条形图。
我从http://www.raywenderlich.com/13271/how-to-draw-graphs-with-core-plot-part-2中提取了教程项目。
我稍微改变了教程以提取Web服务数据而不是静态数据。
现在，当我将视图加载到视图控制器中时，一切都很好 - 条形图显示完美且一切。
此外，我在示例中使用了散点图，对数据拉取的Web服务数据做了相同的操作，并在自己的视图控制器中显示了图形。
现在，我想将散点图和条形图添加到视图控制器的子视图中。
理解两者都可以在一个视图控制器中查看，它的子类是UINavigationController（希望我的术语是正确的：/）。
无论如何，我能够在子视图中显示SCATTER PLOT图....没问题....
但最令人沮丧的是每当我为条形图做同样的事情时... BOOM CRASH CRASH CRASH !!!!
它在我在条形图的视图中添加条形图的行上崩溃了......
[graph addPlot:plot toPlotSpace:graph.defaultPlotSpace];
没有这一行...应用程序运行但没有可见的栏....
现在我没有将图形添加到我的子视图中并转到视图控制器，它显示图形，没有崩溃....但是我将BAR GRAPH添加到uiviewcontroller的子视图中内容谎言...... CRASH CRASH CRASH ......
让我如此沮丧的是散射情节图一切都很好.....不是条形图......
如果需要，我会提供更多信息....我想知道如何在uiview中添加条形图
这就是我做的......
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 140, 320, 150)];
view.backgroundColor = [UIColor clearColor];
[scroller addSubview:view];
_0DGraphViewController *BarGraphView = [[_0DGraphViewController alloc] init];
BarGraphView.hostView.frame = CGRectMake(view.bounds.origin.x, view.bounds.origin.y, view.bounds.size.width , view.bounds.size.height);
[view addSubview:BarGraph.view];
继承我的条形图类
#import "30DGraphViewController.h"
#define graphData30DRequest [NSURL URLWithString:url]
@implementation _0DGraphViewController
@synthesize hostView = hostView_;
@synthesize priceAnnotation = priceAnnotation_;
CGFloat const _0DBarWidth = 0.25f;
CGFloat const _0DBarInitialX = 0.25f;
-(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.
}
#pragma mark - UIViewController lifecycle methods
//-(void)viewDidAppear:(BOOL)animated {
// [super viewDidAppear:animated];
//}
- (void)viewDidLoad
{
//[super viewDidLoad];
graphData = [[PullEasyViewData alloc] init];
SWRevealViewController *revealController = [self revealViewController];
[self.navigationController.navigationBar addGestureRecognizer:revealController.panGestureRecognizer];
UIBarButtonItem *revealButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"reveal-icon.png"]
style:UIBarButtonItemStyleBordered target:revealController action:@selector(revealToggle:)];
self.navigationItem.leftBarButtonItem = revealButtonItem;
UIBarButtonItem *rightRevealButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"reveal-icon.png"]
style:UIBarButtonItemStyleBordered target:revealController action:@selector(rightRevealToggle:)];
self.navigationItem.rightBarButtonItem = rightRevealButtonItem;
dispatch_async(dispatch_get_main_queue(), ^{
NSString *startDate = @"20130514";
NSString *endDate = @"20130613";
NSData* data = [NSData dataWithContentsOfURL:[NSURL URLWithString:url]];
[graphData performSelectorOnMainThread:@selector(fetchGraphDataRequestData30D:) withObject:data waitUntilDone:YES];
dispatch_async(dispatch_get_main_queue(), ^{
[self initPlot];
});
});
}
#pragma mark - Rotation
-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
return (interfaceOrientation == UIInterfaceOrientationLandscapeLeft);
}
#pragma mark - Chart behavior
-(void)initPlot {
self.hostView.allowPinchScaling = NO;
[self configureHost];
[self configureGraph];
[self configurePlots];
[self configureAxes];
}
-(void)configureHost {
//self.hostView = [(CPTGraphHostingView *) [CPTGraphHostingView alloc] initWithFrame:self.view.bounds];
self.hostView = [(CPTGraphHostingView *) [CPTGraphHostingView alloc] initWithFrame:CGRectMake(0, 0, 320, 170)];
self.hostView.allowPinchScaling = YES;
[self.view addSubview:self.hostView];
}
-(void)configureGraph {
// 1 - Create the graph
CPTGraph *graph = [[CPTXYGraph alloc] initWithFrame:self.hostView.bounds];
graph.plotAreaFrame.masksToBorder = NO;
self.hostView.hostedGraph = graph;
// 2 - Configure the graph
[graph applyTheme:[CPTTheme themeNamed:kCPTPlainBlackTheme]];
graph.paddingBottom = 30.0f;
graph.paddingLeft = 30.0f;
graph.paddingTop = -1.0f;
graph.paddingRight = -5.0f;
// 3 - Set up styles
CPTMutableTextStyle *titleStyle = [CPTMutableTextStyle textStyle];
titleStyle.color = [CPTColor whiteColor];
titleStyle.fontName = @"Helvetica-Bold";
titleStyle.fontSize = 16.0f;
// 4 - Set up title
NSString *title = @"Portfolio Prices: April 23 - 27, 2012";
graph.title = title;
graph.titleTextStyle = titleStyle;
graph.titlePlotAreaFrameAnchor = CPTRectAnchorTop;
graph.titleDisplacement = CGPointMake(0.0f, -16.0f);
// 5 - Set up plot space
CGFloat xMin = 0.0f;
CGFloat xMax = [[graphData getGraphDates30D] count];//[[[CPDStockPriceStore sharedInstance] datesInWeek] count];
CGFloat yMin = 0.0f;
CGFloat yMax = 20.0f; // should determine dynamically based on max price
CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *) graph.defaultPlotSpace;
plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(xMin) length:CPTDecimalFromFloat(xMax)];
plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(yMin) length:CPTDecimalFromFloat(yMax)];
}
-(void)configurePlots {
// 1 - Set up the three plots
CPTBarPlot *aaplPlot = [CPTBarPlot tubularBarPlotWithColor:[CPTColor redColor] horizontalBars:NO];
aaplPlot.identifier = CPDTickerSymbolAAPL;
//CPTBarPlot *googPlot = [CPTBarPlot tubularBarPlotWithColor:[CPTColor greenColor] horizontalBars:NO];
//googPlot.identifier = CPDTickerSymbolGOOG;
//CPTBarPlot *msftPlot = [CPTBarPlot tubularBarPlotWithColor:[CPTColor blueColor] horizontalBars:NO];
//msftPlot.identifier = CPDTickerSymbolMSFT;
// 2 - Set up line style
CPTMutableLineStyle *barLineStyle = [[CPTMutableLineStyle alloc] init];
barLineStyle.lineColor = [CPTColor lightGrayColor];
barLineStyle.lineWidth = 0.5;
// 3 - Add plots to graph
CPTGraph *graph = self.hostView.hostedGraph;
CGFloat barX = _0DBarInitialX;
//NSArray *plots = [NSArray arrayWithObjects:aaplPlot, googPlot, msftPlot, nil];
NSArray *plots = [NSArray arrayWithObjects:aaplPlot, nil];
for (CPTBarPlot *plot in plots) {
plot.dataSource = self;
plot.delegate = self;
plot.barWidth = CPTDecimalFromDouble(_0DBarWidth);
plot.barOffset = CPTDecimalFromDouble(barX);
plot.lineStyle = barLineStyle;
[graph addPlot:plot toPlotSpace:graph.defaultPlotSpace];
barX += _0DBarWidth;
}
}
-(void)configureAxes {
// 1 - Configure styles
CPTMutableTextStyle *axisTitleStyle = [CPTMutableTextStyle textStyle];
axisTitleStyle.color = [CPTColor whiteColor];
axisTitleStyle.fontName = @"Helvetica-Bold";
axisTitleStyle.fontSize = 12.0f;
CPTMutableLineStyle *axisLineStyle = [CPTMutableLineStyle lineStyle];
axisLineStyle.lineWidth = 2.0f;
axisLineStyle.lineColor = [[CPTColor whiteColor] colorWithAlphaComponent:1];
// 2 - Get the graph's axis set
CPTXYAxisSet *axisSet = (CPTXYAxisSet *) self.hostView.hostedGraph.axisSet;
// 3 - Configure the x-axis
axisSet.xAxis.labelingPolicy = CPTAxisLabelingPolicyNone;
axisSet.xAxis.title = @"Days of Week (Mon - Fri)";
axisSet.xAxis.titleTextStyle = axisTitleStyle;
axisSet.xAxis.titleOffset = 10.0f;
axisSet.xAxis.axisLineStyle = axisLineStyle;
// 4 - Configure the y-axis
axisSet.yAxis.labelingPolicy = CPTAxisLabelingPolicyNone;
axisSet.yAxis.title = @"Price";
axisSet.yAxis.titleTextStyle = axisTitleStyle;
axisSet.yAxis.titleOffset = 5.0f;
axisSet.yAxis.axisLineStyle = axisLineStyle;
}
-(void)hideAnnotation:(CPTGraph *)graph {
if ((graph.plotAreaFrame.plotArea) && (self.priceAnnotation)) {
[graph.plotAreaFrame.plotArea removeAnnotation:self.priceAnnotation];
self.priceAnnotation = nil;
}
}
#pragma mark - CPTPlotDataSource methods
-(NSUInteger)numberOfRecordsForPlot:(CPTPlot *)plot {
//return [[[CPDStockPriceStore sharedInstance] datesInWeek] count];
return [[graphData getGraphDates30D] count];
}
-(NSNumber *)numberForPlot:(CPTPlot *)plot field:(NSUInteger)fieldEnum recordIndex:(NSUInteger)index {
//if ((fieldEnum == CPTBarPlotFieldBarTip) && (index < [[[CPDStockPriceStore sharedInstance] datesInWeek] count])) {
if ((fieldEnum == CPTBarPlotFieldBarTip) && (index < [[graphData getGraphDates30D] count])) {
if ([plot.identifier isEqual:CPDTickerSymbolAAPL]) {
return [[graphData getGraphValues30D] objectAtIndex:index];
//return [[[CPDStockPriceStore sharedInstance] weeklyPrices:CPDTickerSymbolAAPL] objectAtIndex:index];
} else if ([plot.identifier isEqual:CPDTickerSymbolGOOG]) {
//return [[[CPDStockPriceStore sharedInstance] weeklyPrices:CPDTickerSymbolGOOG] objectAtIndex:index];
} else if ([plot.identifier isEqual:CPDTickerSymbolMSFT]) {
//return [[[CPDStockPriceStore sharedInstance] weeklyPrices:CPDTickerSymbolMSFT] objectAtIndex:index];
}
}
return [NSDecimalNumber numberWithUnsignedInteger:index];
}
#pragma mark - CPTBarPlotDelegate methods
-(void)barPlot:(CPTBarPlot *)plot barWasSelectedAtRecordIndex:(NSUInteger)index {
// 1 - Is the plot hidden?
if (plot.isHidden == YES) {
return;
}
// 2 - Create style, if necessary
static CPTMutableTextStyle *style = nil;
if (!style) {
style = [CPTMutableTextStyle textStyle];
style.color= [CPTColor yellowColor];
style.fontSize = 16.0f;
style.fontName = @"Helvetica-Bold";
}
// 3 - Create annotation, if necessary
NSNumber *price = [self numberForPlot:plot field:CPTBarPlotFieldBarTip recordIndex:index];
if (!self.priceAnnotation) {
NSNumber *x = [NSNumber numberWithInt:0];
NSNumber *y = [NSNumber numberWithInt:0];
NSArray *anchorPoint = [NSArray arrayWithObjects:x, y, nil];
self.priceAnnotation = [[CPTPlotSpaceAnnotation alloc] initWithPlotSpace:plot.plotSpace anchorPlotPoint:anchorPoint];
}
// 4 - Create number formatter, if needed
static NSNumberFormatter *formatter = nil;
if (!formatter) {
formatter = [[NSNumberFormatter alloc] init];
[formatter setMaximumFractionDigits:2];
}
// 5 - Create text layer for annotation
NSString *priceValue = [formatter stringFromNumber:price];
CPTTextLayer *textLayer = [[CPTTextLayer alloc] initWithText:priceValue style:style];
self.priceAnnotation.contentLayer = textLayer;
// 6 - Get plot index based on identifier
NSInteger plotIndex = 0;
if ([plot.identifier isEqual:CPDTickerSymbolAAPL] == YES) {
plotIndex = 0;
} else if ([plot.identifier isEqual:CPDTickerSymbolGOOG] == YES) {
plotIndex = 1;
} else if ([plot.identifier isEqual:CPDTickerSymbolMSFT] == YES) {
plotIndex = 2;
}
// 7 - Get the anchor point for annotation
CGFloat x = index + _0DBarInitialX + (plotIndex * _0DBarWidth);
NSNumber *anchorX = [NSNumber numberWithFloat:x];
CGFloat y = [price floatValue] + 40.0f;
NSNumber *anchorY = [NSNumber numberWithFloat:y];
self.priceAnnotation.anchorPlotPoint = [NSArray arrayWithObjects:anchorX, anchorY, nil];
// 8 - Add the annotation
[plot.graph.plotAreaFrame.plotArea addAnnotation:self.priceAnnotation];
}
@end
请帮忙!!!!当添加到uiviewcontroller中的uiview时，散点图类工作.....但不是这个条形图!!!!
修改
崩溃不会给我任何除此之外的任何信息
0x1a3209f: movl (%edi), %esi Thread 1: EXC_BAD_ACCESS (code=1, address=0x5489c855)
答案 0 :(得分：1)
经过几天的等待和Coreplot成员的帮助......问题得到了解决......
显然，对于条形图，我必须确保在图表生命周期的整个生命周期内不会发布图表。
在为CPTBarplot分配和实例化空间后添加这一行代码确保了这一点，
[barplot.datasource retain];
一行代码总能帮助：）.....
这让我的日子在我的子视图中看到我的图表....现在让轴看起来很漂亮.....