iphone中的核心plot图形绘制问题

Question

当我使用这条线绘制图形时，我的应用退出

CPGraphHostingView *hostingView = (CPGraphHostingView *)self.view;
         hostingView.hostedGraph = barChart;

错误

[UIView setHostedGraph:]: unrecognized selector sent to instance 0x595fb20
2011-06-11 11:00:14.452 CGH[4909:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIView setHostedGraph:]: unrecognized selector sent to instance 0x595fb20'

如何解决此问题，我已正确包含所有库

＃＃＃＃ 更新

我再次使用它，但出现此错误，我已在 nib 文件中连接了 class

 2011-09-28 14:53:06.791 Ihope_test_sql[9307:707] Unknown class CPTGraphHostingView in Interface Builder file. 2011-09-28 14:53:06.795 Ihope_test_sql[9307:707] Unknown class CPTGraphHostingView in Interface Builder file. 2011-09-28 14:53:06.797 Ihope_test_sql[9307:707] Unknown class CPTGraphHostingView in Interface Builder file. 2011-09-28 14:53:06.800 Ihope_test_sql[9307:707] Unknown class CPTGraphHostingView in Interface Builder file. 2011-09-28 14:53:06.847 Ihope_test_sql[9307:707] -[UIView setHostedGraph:]: unrecognized selector sent to instance 0x1cd920 2011-09-28 14:53:06.875 Ihope_test_sql[9307:707] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIView setHostedGraph:]: unrecognized selector sent to instance 0x1cd920' *** Call stack at first throw:

Answer 1

您似乎在普通视图中托管图表。 您是否遵循核心情节样本？ 尝试在 interfaceBuilder 中将 UIView Class 更改为 CPGraphHostingView。 您不会因为界面生成器的警告而崩溃。