There are no friends used the core plot? Have a question to ask

I now need a frame to display multiple charts simultaneously, but I used subview, the program would crash, and the direct use self.view okay, this is why? I tracked the problem did not find anything about it? Who are so used? Seeking advice.
Code is as follows

UIView * subv = [self.view.subviews objectAtIndex: 0];
graph = [[CPTXYGraph alloc] initWithFrame: subv.bounds];
CPTTheme * theme = [CPTTheme themeNamed: kCPTDarkGradientTheme];

CPTGraphHostingView * hostingView = (CPTGraphHostingView *) subv;
hostingView.hostedGraph = graph; / / this line the error.

------- The following error
not directly self.viewgraph = [[CPTXYGraph alloc] initWithFrame: self.view.bounds];
CPTTheme * theme = [CPTTheme themeNamed: kCPTDarkGradientTheme];

CPTGraphHostingView * hostingView = (CPTGraphHostingView *) self.view;
hostingView.hostedGraph = graph;


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subview is a subview and self.view is the default view of this controller, but the graph may be because of the sub-view does not exist Failed to initialize an error
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Get their own, want to replace the original view into graphview core plot provided
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The landlord Hello, I would like to ask how the core plot also shows a view controller inside a line chart, bar chart, pie chart, ah, I use another view controller to load a core plot graph controller, but always loaded not, what is the reason ah
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reference to the third floor of the reply:

landlord Hello, I would like to ask how to display core plot line graph, bar graph, pie at the same time inside a view controller like figure ah, I use another view controller to load a core plot graph controller, but not always loaded on what ah

Allow a controller to control multiple sub-views (CPTGraphHostingView) on the line
Reply:

references, 4th Floor reply:

allow a controller to control multiple sub-views (CPTGraphHostingView) on the line

Thank you, you can load came in, but CPTGraphHostingView is reversed, you can set it up yet?

Reply:

references, 5th Floor reply:

references, 4th Floor reply:
Allow a controller to control multiple sub-views (CPTGraphHostingView) on the line


Thank you, you can load came in, but CPTGraphHostingView is reversed, you can set it up right?

How will the anti-ah? I use are positive ah. CPTGraphHostingView coordinate origin in the lower left corner of the coordinate system origin, UIView in the upper left corner, you are not this confused?
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references 6th Floor reply:

how would be counter-ah? I use are positive ah. CPTGraphHostingView coordinate origin in the lower left corner of the coordinate system origin, UIView in the upper left corner, you are not this confused? ......

I was in a UIviewcontroller which added a CPTGraphHostingView and a segmented controls, CPTGraphHostingView to display maps, segmented controls to switch (line charts, bar charts, pie charts), CPTGraphHostingView which is loaded Other UIviewcontroller controller (there is figure painting)
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reference to the 7th floor of replies:

references 6th Floor reply:
How will the anti-ah? I use are positive ah. CPTGraphHostingView coordinate origin in the lower left corner of the coordinate system origin, UIView in the upper left corner, you are not this confused? ......


I was in a UIviewcontroller which added a CPTGraphHostingView and a segmented controls, CPTGraphHostingView to display maps, segmented controls to switch (line charts, bar charts, pie charts), CPTG ......

You say one view controller plus a few CPTGraphHostingView, line charts and bar charts but creates a view controller inside - [- (double *) doublesForPlot: (CPTPlot *) plot field: (NSUInteger) fieldEnum recordIndexRange: (NSRange ) indexRange] This method generates a line chart is not an error, but a plus histogram on the error, should not the same as line charts and bar charts inside approach, I do not know when this method is inside the histogram how to deal with