当我尝试编译以下代码时出现以下错误:
由于未捕获的异常“NSInvalidArgumentException”而终止应用程序,原因:“-[UIView setHostedGraph:]:无法识别的选择器发送到实例 0x6768c10”
Code:
UIView *ChartView;
ChartView = [[UIView alloc] init];
graph = [[CPXYGraph alloc] initWithFrame: ChartView.bounds];
CPGraphHostingView *hostingView = (CPGraphHostingView *)ChartView;
hostingView.hostedGraph = graph;
可能出什么问题了?
您正在投射一个UIView
实例(这确实not回应-setHostedGraph:
) to a CPGraphHostingView
。 - 这会not work.
您需要创建一个实际的CPGraphHostingView
目的,then invoke -setHostedGraph:
on it.
所以,你的代码应该是这样的:
CGRect someFrame = ...;
CPGraphHostingView *hostingView = [[CPGraphHostingView alloc] initWithFrame:someFrame];
graph = [[CPXYGraph alloc] initWithFrame: hostingView.bounds];
hostingView.hostedGraph = graph;
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