CorePlot在iOS7 app/Xcode5中抛出异常

Question

我有一个iOS7应用程序,我试图将CorePlot 1.4集成到(从属项目安装).

@property (nonatomic) CPTGraphHostingView *hostingView;

和

_hostingView = [[CPTGraphHostingView alloc] initWithFrame:CGRectNull];

(_hostingView受自动布局限制.)如果我然后添加图表:

CPTXYGraph *graph = [[CPTXYGraph alloc] initWithFrame:CGRectZero];
_hostingView.hostedGraph = graph;

我首先得到这个例外:

-[CPTTextStyle attributes]: unrecognized selector sent to instance 0xa392900
 *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[CPTTextStyle attributes]: unrecognized selector sent to instance 0xa392900'
5   myapp                     0x00074325 -[CPTAxis updateAxisLabelsAtLocations:inRange:useMajorAxisLabels:] + 1141
6   myapp                     0x00075662 -[CPTAxis relabel] + 1202

无奈之下,我已经updateAxisLabelsAtLocations:inRange:useMajorAxisLabels通过以下方式解决了这个问题:

NSDictionary *textAttributes = nil;
BOOL hasAttributedFormatter  = FALSE;

然后得到下一个异常:

-[__NSCFString sizeWithTextStyle:]: unrecognized selector sent to instance 0x9591e90
 *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString sizeWithTextStyle:]: unrecognized selector sent to instance 0x9591e90'
5   myapp                     0x00081520 -[CPTTextLayer sizeThatFits] + 320
6   myapp                     0x0008163c -[CPTTextLayer sizeToFit] + 108
7   myapp                     0x00080559 -[CPTTextLayer initWithText:style:] + 313
8   myapp                     0x00074b87 -[CPTAxis updateAxisLabelsAtLocations:inRange:useMajorAxisLabels:] + 3159
9   myapp                     0x00075672 -[CPTAxis relabel] + 1202

然后我通过评论这一行来"修复"这个sizeThatFits:

    else {
     //   textSize = [myText sizeWithTextStyle:self.textStyle];
    }

然后是下一个例外:

-[__NSCFString drawInRect:withTextStyle:inContext:]: unrecognized selector sent to instance 0xa162bd0
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString drawInRect:withTextStyle:inContext:]: unrecognized selector sent to instance 0xa162bd0'
5   myapp                     0x00081dc8 -[CPTTextLayer renderAsVectorInContext:] + 1144
6   myapp                     0x00063f60 -[CPTLayer drawInContext:] + 112

通过在下面的代码中注释掉来修复renderAsVectorInContext:

    else {
     //   [myText drawInRect:newBounds
     //        withTextStyle:self.textStyle
     //            inContext:context];
    }

现在最后不会抛出任何异常并显示图形边框.但是,如果我然后开始添加数据/图例等,则抛出新的异常:(

轴上没有显示文字等.当然这是因为我已经注释掉了代码.但任何线索为什么抛出这些异常？我很绝望; S

似乎我错过了整合中的一些基本信息.但是我的集成(虽然CorePlot 1.3)在Xcode4上的iOS6应用程序中运行良好.

Answer 1

检查应用程序项目中的链接器标志.Core Plot需要-ObjC和-all_load.有关更多信息,请参阅Core Plot wiki.