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我要让这样一件事:http://youtu.be/PeRhxSCx2xM核心情节禁用轴和y轴缩放,滚动
我尝试实现这个方法:
//viewDidLoad
//plotSpace.delegate = self;
- (CPTPlotRange *)plotSpace:(CPTPlotSpace *)space
willChangePlotRangeTo:(CPTPlotRange *)newRange
forCoordinate:(CPTCoordinate)coordinate {
NSLog(@"WillChangePlotRangeTo");
// only allows scrolling to the right
// remove this to have scrolling in both directions
if (newRange.locationDouble < 0.0F) {
newRange.location = CPTDecimalFromFloat(0.0);
}
// Adjust axis to keep them in view at the left and bottom;
// adjust scale-labels to match the scroll.
CPTXYAxisSet *axisSet = (CPTXYAxisSet *)graph.axisSet;
if (coordinate == CPTCoordinateX) {
axisSet.yAxis.orthogonalCoordinateDecimal = newRange.location;
axisSet.xAxis.titleLocation = CPTDecimalFromFloat(newRange.locationDouble +
(newRange.lengthDouble/2.0F));
} else {
axisSet.xAxis.orthogonalCoordinateDecimal = newRange.location;
axisSet.yAxis.titleLocation = CPTDecimalFromFloat(newRange.locationDouble +
(newRange.lengthDouble/2.0F));
}
return newRange;
}
,我尝试这,这个解决方案的工作时,我缩小,而不是当我放大工作。
plotSpace.yRange = [CPTPlotRange plotRangeWithLocation:CPTDecimalFromFloat(1.0) length:CPTDecimalFromFloat(3.0)];
plotSpace.globalYRange = plotSpace.yRange;
谁能请解释我,什么是正确的结果,其工作实际上是如何。
感谢的答复
完美的答案它的工作,非常感谢你,只有一件事:当我做出一个大的缩小应用程序崩溃与此消息: - [CPTPlotRange mutableCopyWithZone:]:无法识别的选择器发送到实例0xd876030 2012-03-01 07:41:58.676 SSDev [823:11f03] ***由于未捕获异常'NSInvalidArgumentException',原因:' - [CPTPlotRange mutableCopyWithZone :]:无法识别的选择器发送到实例0xd876030' ***第一次抛出调用堆栈: – flatronka 2012-03-01 05:44:22