如何在核心情节旋转CPTGraphhostingview

Question

请指导我如何通过单手指触摸（时钟和反时钟方向）旋转CPTGraphHostingView

感谢

Answer 1

//我已经使用这个代码旋转的饼图几秒钟没有用户交互。

-(void)ConstPieChart 
{ 
    graph = [[CPXYGraph alloc] initWithFrame: CGRectZero]; 

    viewGraphHostingPie.hostedGraph=graph; 

    CPPieChart *pieChart = [[CPPieChart alloc] init]; 
    pieChart.dataSource = self; 
    pieChart.delegate = self; 
    pieChart.pieRadius = 100.0; 
    pieChart.identifier = @"PieChart1"; 
    pieChart.startAngle=0; 
    //pieChart.startAngle = M_PI_4; 
    pieChart.sliceDirection = CPPieDirectionCounterClockwise; 



    NSMutableArray *ValueArray = [[NSMutableArray alloc]init]; 
    ValueArray = [NSArray arrayWithObjects:[NSNumber numberWithDouble:57.03],[NSNumber numberWithDouble:66.00],[NSNumber numberWithDouble:77.03],nil]; 
    self.pieData = ValueArray; 




    CABasicAnimation *rotation = [CABasicAnimation animationWithKeyPath:@"transform"]; 
    CATransform3D transform = CATransform3DMakeRotation(360, 0, 0, 1); 
    rotation.toValue = [NSValue valueWithCATransform3D:transform]; 
    rotation.duration = 15.0f; 
    [pieChart addAnimation:rotation forKey:@"rotation"]; 
    [graph addPlot:pieChart]; 
    [pieChart release]; 
} 

Answer 2

看看这个链接会有帮助。只是尝试一下..

http://groups.google.com/group/coreplot-discuss/browse_thread/thread/4372a7590c474c85

的