ios - Core-Plot iOS - 仅每隔一秒图表显示一次将多个图表添加到屏幕

Question

我有一个包含 6 个 UIView 的父 View ，我向其中添加了我的核心绘图图表(这工作正常，但由于某种原因仅每隔一秒钟显示一次图表!)

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
if(!chartVC1){
    chartVC1 = [[ChartVC alloc] initWithIdentifier:@"plot1"];
    //[chartVC1 setKPlotIdentifier:@"plot1"];
    [chartVC1.view setFrame:self.Panel1.frame];
}
[self.Panel1 addSubview:chartVC1.view];

if(!chartVC3){
    chartVC3 = [[ChartVC alloc] initWithIdentifier:@"plot2"];
    [chartVC3.view setFrame:self.Panel3.frame];
}
[self.Panel3 addSubview:chartVC3.view];

if(!chartVC2){
    chartVC2 = [[ChartVC alloc] initWithIdentifier:@"plot3"];
    [chartVC2.view setFrame:self.Panel2.frame];
}

[self.Panel2 addSubview:chartVC2.view];

if(!chartVC4){
    chartVC4 =  [[ChartVC alloc] initWithIdentifier:@"plot4"];
    [chartVC4.view setFrame:self.Panel4.frame];
}
[self.Panel4 addSubview:chartVC4.view];

if(!chartVC5){
    chartVC5 =  [[ChartVC alloc] initWithIdentifier:@"plot5"];
    [chartVC5.view setFrame:self.Panel5.frame];

}
[self.Panel5 addSubview:chartVC5.view];

if(!chartVC6){
    chartVC6 = [[ChartVC alloc] initWithIdentifier:@"plot6"];
    [chartVC6.view setFrame:self.Panel6.frame];
}
[self.Panel6 addSubview:chartVC6.view];
}

这是我为类 ChartVC 编写的一些代码

-(void)renderInLayer{ CPTXYGraph *graph = [[[CPTXYGraph alloc] initWithFrame:self.view.bounds] autorelease];

[self addGraph:graph toHostingView:self.view];
[self applyTheme:nil toGraph:graph withDefault:[CPTTheme themeNamed:kCPTDarkGradientTheme]];

//[self setTitleDefaultsForGraph:graph withBounds:self.view.bounds];
//[self setPaddingDefaultsForGraph:graph withBounds:self.view.bounds];

graph.plotAreaFrame.paddingTop    = -20.0;
 graph.plotAreaFrame.paddingRight  = -20.0;
 graph.plotAreaFrame.paddingBottom = -20.0;
 graph.plotAreaFrame.paddingLeft      = -20.0;

graph.plotAreaFrame.plotArea.frame = self.view.bounds;

graph.backgroundColor = [[UIColor whiteColor] CGColor];
// Grid line styles
CPTMutableLineStyle *majorGridLineStyle = [CPTMutableLineStyle lineStyle];
majorGridLineStyle.lineWidth = 0.75;
majorGridLineStyle.lineColor = [[CPTColor colorWithGenericGray:0.2] colorWithAlphaComponent:0.75];

CPTMutableLineStyle *minorGridLineStyle = [CPTMutableLineStyle lineStyle];
minorGridLineStyle.lineWidth = 0.25;
minorGridLineStyle.lineColor = [[CPTColor whiteColor] colorWithAlphaComponent:0.1];

// Axes
// X axis
CPTXYAxisSet *axisSet = (CPTXYAxisSet *)graph.axisSet;
CPTXYAxis *x          = axisSet.xAxis;
x.labelingPolicy              = CPTAxisLabelingPolicyAutomatic;
x.orthogonalCoordinateDecimal = CPTDecimalFromUnsignedInteger(0);
x.majorGridLineStyle          = majorGridLineStyle;
x.minorGridLineStyle          = minorGridLineStyle;
x.minorTicksPerInterval       = 9;
//x.title                         = @"X Axis";
//x.titleOffset               = 35.0;
NSNumberFormatter *labelFormatter = [[NSNumberFormatter alloc] init];
labelFormatter.numberStyle = NSNumberFormatterNoStyle;
x.labelFormatter           = labelFormatter;
[labelFormatter release];

// Y axis
CPTXYAxis *y = axisSet.yAxis;
y.labelingPolicy              = CPTAxisLabelingPolicyAutomatic;
y.orthogonalCoordinateDecimal = CPTDecimalFromUnsignedInteger(0);
y.majorGridLineStyle          = majorGridLineStyle;
y.minorGridLineStyle          = minorGridLineStyle;
y.minorTicksPerInterval       = 3;
//y.labelOffset               = 5.0;
//y.title                         = @"Y Axis";
//y.titleOffset               = 30.0;
y.axisConstraints             = [CPTConstraints constraintWithLowerOffset:0.0];

// Rotate the labels by 45 degrees, just to show it can be done.
x.labelRotation = M_PI * 0.25;

// Create the plot
CPTScatterPlot *dataSourceLinePlot1 = [[[CPTScatterPlot alloc] init] autorelease];
dataSourceLinePlot1.identifier    = [self kPlotIdentifier];
//NSLog(@"set identifier: %@", [self kPlotIdentifier]);
dataSourceLinePlot1.cachePrecision = CPTPlotCachePrecisionDouble;

CPTMutableLineStyle *lineStyle1 = [[dataSourceLinePlot1.dataLineStyle mutableCopy] autorelease];
lineStyle1.lineWidth                 = 1.0;
lineStyle1.lineColor                 = [CPTColor redColor];
dataSourceLinePlot1.dataLineStyle = lineStyle1;

dataSourceLinePlot1.dataSource = self;
[graph addPlot:dataSourceLinePlot1];

 // Plot space
 CPTXYPlotSpace *plotSpace = (CPTXYPlotSpace *)graph.defaultPlotSpace;
 plotSpace.xRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromUnsignedInteger(0) length:CPTDecimalFromUnsignedInteger(kMaxDataPoints - 1)];
 plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromUnsignedInteger(0) length:CPTDecimalFromUnsignedInteger(100)];

}

如果只显示第一个图表，我会认为问题是我自己的错，但因为每隔一个图表显示它对我来说没有任何意义..

我唯一的猜测是这是某种时间问题，但我对其进行了调试并延迟了每个图表的创建，但没有任何区别。

我什至删除了第 3、5 个图表以查看其他图表现在是否呈现，但之前未显示的相同 3 个图表仍然不可见，这真的让我失望了..(即只有第一个图表显示在4 个启用!)

非常感谢任何帮助...

我可能只使用 Apple Developer Library 中的代码来呈现加速度计数据，因为它非常轻量级，一次可以毫无问题地在屏幕上支持 6 个图表...

Core-Plot 似乎不能胜任我猜想的任务......

Answer 1

您没有说哪些图表没有显示，但由于它们总是相同的，我怀疑 View 层次结构存在问题。尝试改变

`[chartVC1.view setFrame:self.Panel1.frame];`

到

`[chartVC1.view setFrame:self.Panel1.bounds];`

对于每个图表。